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Debonding Analysis of Adhesively Bonded Pipe Joints Subjected to Combined Thermal and Mechanical Loadings Int. J. Comput. Methods (IF 1.716) Pub Date : 20210412
Hong Yuan, Jun Han, Huanliang Zhang, Lan ZengIn order to better understand the interfacial debonding behavior of pipe joints during the whole loading process, an analytical solution for the fullrange behavior of adhesively bonded pipe joints under combined thermal and mechanical tensile loadings is presented in this paper. The solution was developed based on a simplified rigidsoftening bond–slip model, and two cases with different softening

Contact Analysis Based on a Linear Strain NodeBased Smoothed Finite Element Method with Linear Complementarity Formulations Int. J. Comput. Methods (IF 1.716) Pub Date : 20210412
Yan Li, Junhong YueThis paper presents the nodebased smoothed finite element method with linear strain functions (NSFEML) for solving contact problems using triangular elements. The smoothed strains are formulated by a complete order of polynomial functions and normalized with reference to the central points of smoothing domains. They are one order higher than those adopted in the finite element method (FEM) and the

FullScale Bounds Estimation for the Nonlinear Transient Heat Transfer Problems with Interval Uncertainties Int. J. Comput. Methods (IF 1.716) Pub Date : 20210412
Ruifei Peng, Haitian Yang, Yanni XueA package solution is presented for the fullscale bounds estimation of temperature in the nonlinear transient heat transfer problems with small or large uncertainties. When the interval scale is relatively small, an efficient Taylor series expansionbased bounds estimation of temperature is stressed on the acquirement of first and secondorder derivatives of temperature with high fidelity. When the

Iterative Approximation of Preconditioning Matrices Through KrylovType Solver Iterations Int. J. Comput. Methods (IF 1.716) Pub Date : 20210412
Noriyuki Kushida, Hiroshi OkudaLinear equation solvers require considerable computational time in many computer simulation methods, such as the stress analysis using the finite element method (FEM), or the fluid dynamics using an implicit time integration scheme. Because of their favorable nature to modern supercomputers, Krylovtype linear equation solvers have become dominant. Krylovtype solvers are usually used with preconditioners

An Equivalent Identification Method for Dynamic Loads Acting on Nonlinear Structures Int. J. Comput. Methods (IF 1.716) Pub Date : 20210412
Zhongbo Yu, Kun Li, Jie Liu, Cheng Lu, Xiaobing BuAn efficient dynamic load identification method for nonlinear structures is proposed. Assuming that the nonlinear elements of a structure can be separated, or the structural kinetic equation can be available, the whole structural damping and stiffness matrices can be divided into linear and nonlinear sub matrices. Regarding the effects of the nonlinear elements on the linear ones as dynamic load constraints

Effect of Elevated Temperature on Concrete Structures by Discontinuous Boundary Element Method Int. J. Comput. Methods (IF 1.716) Pub Date : 20210407
Petr P. ProchazkaChanges in the thermomechanical properties of fiberreinforced concrete (FRC) exposed to fire are fundamentally affected by the type and volume fraction of fibers. Because the loss of FRC loadbearing capacity is mainly caused by structural damage, a new numerical procedure based on a modified method of discontinuous boundary elements (DBEM) is proposed, which is modified to include thermomechanical

Heat Transfer in Periodically Laminated Structures – Third Type Boundary Conditions Int. J. Comput. Methods (IF 1.716) Pub Date : 20210316
Ewelina PazeraThis work is about a heat transfer phenomenon in relation to the periodically laminated composite. The specific type of thermal loading, analyzed in this paper, require formulation of Robin boundary conditions. To consider a layered structure of analyzed composite, the tolerance averaging technique is used. This method allows to take into account a thickness of the layers and obtain the equations with

Calculation of Stress/Displacement Field of Mechanical Joint Structure Based on Layered Elastic Theory Int. J. Comput. Methods (IF 1.716) Pub Date : 20210129
Yang Yang, Qingchao Sun, Zhihao Fan, Xianlian Zhang, Lintao WangVarious types of machinery are not a continuous whole, but are assembled from various parts according to specific requirements. The surfaces that contact each other between different parts are often called mechanical joints. The stress/displacement field of the mechanical joint structure is the basis for predicting the mechanical properties of the assembly, optimizing the structure and the assembly

αFinite Element Method for Frictionless and Frictional Contact Including Large Deformation Int. J. Comput. Methods (IF 1.716) Pub Date : 20210330
Sandeep Kshirsagar, Changkye Lee, Sundararajan NatarajanIn this paper, one of the variants of the smoothed finite element method, αFEM is adopted for hyperelastic material with large deformation and contact nonlinearity in two dimensions. The salient feature of the αFEM is that it is stable and this is accomplished by using the scale factor α∈[0,1] to combine the compatible finite element method and the nodebased smoothed finite element method. The framework

Numerical Simulations Using Eulerian Schemes for the Vlasov–Poisson Model Int. J. Comput. Methods (IF 1.716) Pub Date : 20210330
Denis Lorenzon, Sergio A. Elaskar, Andrés M. CiminoThe Vlasov equation describes the temporal evolution of the distribution function of particles in a collisionless plasma and, if magnetic fields are negligible, the mean electric field is prescribed by Poisson equation. Eulerian numerical methods discretize and directly solve the Vlasov equation on a mesh in phase space and can provide high accuracy with low numerical noise. In this paper, we present

Wavelet Lifting Scheme for the Numerical Solution of Dynamic Reynolds Equation for Micropolar Fluid Lubrication Int. J. Comput. Methods (IF 1.716) Pub Date : 20210330
S. C. Shiralashetti, M. H. Kantli, A. B. DeshiRecently, wavelet theory has become a well recognized promising tool in science and engineering field; especially, wavelets are successfully used in fast algorithms for easy execution. In this paper, we developed wavelet lifting scheme using orthogonal and biorthogonal wavelets for the numerical solution of dynamic Reynolds equation for micropolar fluid lubrication. The numerical results gained through

A Multidisciplinary Approach for Optimization Design of CNC Machine Tools Int. J. Comput. Methods (IF 1.716) Pub Date : 20210320
ThiNa Ta, YunnLin Hwang, JengHaur HorngThe main objective of this research is to propose a multidisciplinary approach for the development and design of Computer Numerical Control (CNC) machine tools using numerical optimization methods combined MultiBody Dynamic (MBD) analysis and to control design cosimulation. Metamodels based Sequential Approximate Optimization (SAO) for the cosimulation optimization problems are developed. The metamodels

HighLow Level Support Vector Regression Prediction Approach (HLSVR) for Data Modeling with Input Parameters of Unequal Sample Sizes Int. J. Comput. Methods (IF 1.716) Pub Date : 20210320
Maolin Shi, Liye Lv, Zhenggang Guo, Wei Sun, Xueguan Song, Hongyou LiSupport vector regression (SVR) has been widely used to reduce the high computational cost of computer simulation. SVR assumes the input parameters have equal sample sizes, but unequal sample sizes are often encountered in engineering practices. To solve this issue, a new prediction approach based on SVR, namely as highlow level SVR approach (HLSVR) is proposed for data modeling of input parameters

On the Topology Update of the Numerical Manifold Method for Multiple Crack Propagation Int. J. Comput. Methods (IF 1.716) Pub Date : 20210320
Jun He, Shuling Huang, Xiuli Ding, Yuting Zhang, Dengxue LiuCrack initiation and propagation are the two key issues of concern in the geotechnical engineering. In this study, the numerical manifold method (NMM) is applied to simulate crack propagation and the topology update of the NMM for multiple crack propagation is studied. The cracktip asymptotic interpolation function is incorporated into the NMM to increase the accuracy of the cracktip stress field

Numerical Simulation of a 2D Layered Anode for use in LithiumIon Batteries Int. J. Comput. Methods (IF 1.716) Pub Date : 20210320
Alexander GalashevAn important technological problem is solved by numerical methods. Doping of silicene with phosphorus allows changing the morphology of the walls of the silicene channel without reducing their strength. The structure of lithium packings in the channels is studied in detail. The distribution of normal stresses in the walls of the channel before lithium intercalation and after complete lithium filling

Simpson’s Rule Revisited Int. J. Comput. Methods (IF 1.716) Pub Date : 20210312
Slavko Simić, Bandar BinMohsinIn this paper, we give some refinements of Simpson’s rule in cases when it is not applicable in its classical form i.e., when the target function is not four times differentiable on a given interval. Some sharp twosided inequalities for an extended form of Simpson’s rule are also proven.

Meshless Numerical Simulation of Singular Fields at Crack Tips of Branched Crack Int. J. Comput. Methods (IF 1.716) Pub Date : 20210312
Yinghua Bai, Ran Tian, Xu Tang, LinHao Kong, JiaHui Liu, Fenghua NieOne of the most important tasks in the numerical analysis of the fracture problem is to achieve a highprecision approximation of the singular stress fields at crack tips. Partially or fully enriched basis functions are often used as enhancements on the whole problem domain or just near the crack tips when constructing the meshless shape functions to simulate the singularity fields at crack tips, namely:

A Novel CellCentered Approach of Upwind Types for Convection Diffusion Equations on General Meshes Int. J. Comput. Methods (IF 1.716) Pub Date : 20210312
Hung Vu, Nguyen Huu Du, Thanh Hai OngIn this paper, we present novel cellcentered finite element methods for the convectiondominated convection–diffusion problems on the general meshes. The proposed schemes can be constructed from a general mesh by building with a dual mesh and its triangular submesh. Moreover, the schemes are based on piecewise linear functions combined with two upwind techniques on the dual submesh in order to stabilize

A Novel Family of TwoStage Implicit Time Integration Schemes for Structural Dynamics Int. J. Comput. Methods (IF 1.716) Pub Date : 20210312
Wooram Kim, J. N. ReddyIn this paper, a new family of composite implicit time schemes is developed to overcome some shortcomings of the existing composite schemes. In the development, unconventional time approximations are used for the displacement and velocity vectors. The algorithmic parameters of the approximations are optimized to have improved numerical characteristics. This study also explains some difficulties of

TwoLevel DefectCorrection Stabilized Finite Element Method for the Incompressible Navier–Stokes Equations Based on Pressure Projection Int. J. Comput. Methods (IF 1.716) Pub Date : 20210312
Juan Wen, Yu WangIn this paper, we propose the twolevel defectcorrection stabilized finite element method based on pressure projection for solving the incompressible Navier–Stokes equations. The new method combines the twolevel method and the defectcorrection strategy with the stabilized method based on pressure projection. It has the good properties of these three methods, such as high efficiency, good stability

Meshless Numerical Analysis of Phase Change Problems in Artificial Freezing Technology Applied in GeoMedia Int. J. Comput. Methods (IF 1.716) Pub Date : 20210312
Peipei Chen, Guangchang Yang, Nan WuNumerical solutions to heat conduction problems involving phase change have traditionally been obtained using the gridbased finite difference or finite element methods. However, due to the unique mathematical form of the equations and the limitations of the grid algorithm, difficulties may arise in solutions. In this study, smooth particle hydrodynamics (SPH) method is used to calculate heat conduction

Monitoring and Analysis of Ancient Building Columns on the Basis of Relative Dynamic Method Int. J. Comput. Methods (IF 1.716) Pub Date : 20210308
Xiufang Wang, Guohua Li, Jun Dong, Jihang LiDuring the service period of ancient building structures, due to the cumulative development of local damage to loadbearing members such as columns, the structural strength and stiffness will decrease, which may lead to catastrophic accidents. The traditional damage recognition method based on modal parameters is sometimes not effective. In this study, the vibration analysis combined with the relative

Dynamic Response of the Piezoelectric Materials Based on CellBased Smoothed Finite Element Method in Hygrothermal Environment Int. J. Comput. Methods (IF 1.716) Pub Date : 20210308
Liming Zhou, Jinghao Tang, Yuan Wei, Ming Li, Xiaolin LiIn this paper, the dynamic response of piezoelectric structures under hygrothermal environment is studied by using cellbased smoothed finite element method (CSFEM). Ignoring the influence of temperature and moisture on the response of elastic matrix, we derive the basic equations of the piezoelectric materials under hygrothermal environment. Then the CSFEM equations of piezoelectric problem are

Contact Analysis Within the BiPotential Framework Using CellBased Smoothed Finite Element Method Int. J. Comput. Methods (IF 1.716) Pub Date : 20210308
Qianwei Chen, Yan Li, Zhiqiang Feng, Huijian ChenThis paper presents a cellbased smoothed finite element method (CSFEM) for solving twodimensional contact problems with the bipotential formulation. The contact force and the relative displacements on the contact surface are coupled with each other. The Uzawa algorithm, which is a local iterative technique, is used to solve the contact force. The classic Coulomb friction rule and a unilateral contact

A Global Sensitivity Analysis Method for MultiInput MultiOutput System and its Application in Structural Design Int. J. Comput. Methods (IF 1.716) Pub Date : 20210308
Qiming Liu, Nichen Tong, Xu HanCommonly, variancebased global sensitivity analysis methods are popular and applicable to quantify the impact of a set of input variables on output response. However, for many engineering practical problems, the output response is not single but multiple, which makes some traditional sensitivity analysis methods difficult or unsuitable. Therefore, a novel global sensitivity analysis method is presented

Optimization Method of the Multistage Axial Compressors Using CFD Simulation Int. J. Comput. Methods (IF 1.716) Pub Date : 20210308
Grigorii Popov, Igor Egorov, Evgenii Goriachkin, Oleg Baturin, Daria Kolmakova, Valery MatveevThe current level of numerical methods of gas dynamics makes it possible to optimize compressors using 3D CFD models. However, the methods and means are not sufficiently developed for their wide application. This paper describes a new method for the optimization of multistage axial compressors based on 3D CFD modeling and summarizes the experience of its application. The developed method is a complex

Evaluation of Rounding Functions in Nearest Neighbor Interpolation Int. J. Comput. Methods (IF 1.716) Pub Date : 20210308
Olivier RukundoA novel evaluation study of the most appropriate round function for nearest neighbor image interpolation is presented. Evaluated rounding functions are selected among the five rounding rules defined by the Institute of Electrical and Electronics Engineers IEEE 7542008 standard. Both full and noreference image quality assessment metrics are used to evaluate the influence of rounding functions on

Thermal Elastic–Plastic Analysis of ThreeDimensional Structures Using FaceBased Smoothed Point Interpolation Method Int. J. Comput. Methods (IF 1.716) Pub Date : 20210308
Yudong Zhong, Guizhong Xie, JunJian Hou, Wenbin He, Yuan LiIn this work, a facebased smoothed point interpolation method (FSPIM) is formulated for threedimensional (3D) thermal elasticplastic analysis of structures. For this method, field functions are approximated using second order PIM shape functions and the facebased smoothing domains are used to perform the numerical integration. The material properties are considered to be temperaturedependent

Transient Response Analysis of Underwater Structures Based on Total Field Formulas and Modified Highorder Transmission Boundary Int. J. Comput. Methods (IF 1.716) Pub Date : 20210303
Zibin Zhao, S. M. Li, Yihui YinThe scaled boundary finite element method (SBFEM) has obvious advantages in simulating both finite and infinite domains. However, the present highorder transmission boundary of SBFEM has a problem in numerical stability, especially for 3D fluid–structure interaction (FSI) problems. In this paper, a modified method is put forward to improve the numerical stability of the highorder transmission boundary

An Improved Reflectance Prediction Model for Halftone Printing Dot Based on Monte Carlo Method Int. J. Comput. Methods (IF 1.716) Pub Date : 20210225
Honghao Liu, Kaixing Zhang, Xianxi Liu, Jinxing Wang, Heow Pueh LeeThe improved reflectance prediction model for printing dot was established with the Monte Carlo method. Reflectance model is a useful approach to predict and control printing quality, which was widely used in color duplication field. The Monte Carlo prediction model for printing dot is a simulation model, satisfying industrial virtual reality needs, which could simulate reflectance data as well as

A Relation of Preconditioners in Domain Decomposition Method for Magnetostatic Problems Int. J. Comput. Methods (IF 1.716) Pub Date : 20210225
Hiroshi Kanayama, Masao Ogino, ShinIchiro Sugimoto, Hongjie Zheng, Kaworu YodoAn iterative domain decomposition method is proposed for numerical analysis of 3dimensional (3D) linear magnetostatic problems taking the magnetic vector potential as an unknown function. The iterative domain decomposition method is combined with the preconditioned conjugate gradient (PCG) procedure and the hierarchical domain decomposition method (HDDM) which is adopted in parallel computing. Our

A CellBased Smoothed Finite Element Method for Arbitrary Polygonal Element to Solve Incompressible Laminar Flow Int. J. Comput. Methods (IF 1.716) Pub Date : 20210225
Mingyang Liu, Guangjun Gao, Huifen Zhu, Chen Jiang, Guirong LiuIn this paper, a cellbased smoothed finite element method using the arbitrary nsided polygonal element (CSFEMPoly) is developed to solve fluid mechanics problems. A stabilization method, characteristicbased split coupled with stabilized pressure gradient projection (CBS/SPGP), is employed to deal with numerical oscillations for CSFEMPoly. We validate CSFEMPoly and test its numerical behaviors

A Comparison Between WeaklyCompressible Smoothed Particle Hydrodynamics (WCSPH) and Moving Particle SemiImplicit (MPS) Methods for 3D DamBreak Flows Int. J. Comput. Methods (IF 1.716) Pub Date : 20210108
Rubens A. Amaro Junior, LiangYee Cheng, Sergei K. BuruchenkoLagrangian particlebased methods have opened new perspectives for the investigation of complex problems with large freesurface deformation. Some wellknown particlebased methods adopted to solve nonlinear hydrodynamics problems are the smoothed parti cle hydrodynamics (SPH) and the moving particle semiimplicit (MPS). Both methods model the continuum by a system of Lagrangian particles (points)

An Ecological Equilibrium Dynamics Optimization Approach Int. J. Comput. Methods (IF 1.716) Pub Date : 20210120
Yifan LiaoIn order to solve the problem of complex function optimization, the ecological balance dynamicsbased optimization (EBDO) algorithm is proposed based on the Lotka–Volterra ecological balance dynamics. The algorithm assumes that there are three populations of nurturers, consumers, and decomposers in an ecosystem. The selfplowing is mainly the plant; the consumer is mainly the animal who feeds on the

A Hybrid FundamentalSolutionBased Finite Element Method for Transient Heat Conduction Analysis of TwoDimensional Orthotropic Materials Int. J. Comput. Methods (IF 1.716) Pub Date : 20210129
Huan Liu, Keyong Wang, Qing Liu, Peichao LiA new hybrid fundamentalsolutionbased finite element method (HFSFEM) is developed for the transient heat conduction analysis of twodimensional orthotropic materials. By using coordinate transformation and timestepping approximation, the governing equation of the original problem is converted to the modified Helmholtz equation. In the solution procedure, the homogeneous solutions of the problem

On the Stress Fluctuation in the Smoothed Finite Element Method for 2D Elastoplastic Problems Int. J. Comput. Methods (IF 1.716) Pub Date : 20210129
Peng Zhi, Yuching WuIn this study, the unusual stress fluctuation in the smoothed finite element method (SFEM) for 2D elastoplastic problems is investigated. The governing equation of the 2D elastoplastic problem based on SFEM is presented. The mysterious stress fluctuations from different SFEM approaches are explored. It is demonstrated that conventional finite element method might experience the same symptom. It is

Optimal Routing and Deep Regression Neural Network for Rice Leaf Disease Prediction in IoT Int. J. Comput. Methods (IF 1.716) Pub Date : 20210129
S. Vimala, N. R. Gladiss Merlin, L. Ramanathan, R. CristinTo meet the increasing food demand, production of rice is increased. Unfortunately, rice leaf disease has caused a major problem in the agricultural yield. Various disease prediction strategies are developed in the Internet of Things (IoT) agricultural applications, but accurately predicting the disease causes substantial environmental issues. Therefore, an effective method named Sunflower EarthWorm

Structural Shape Optimization By Coupled FE–MM and Swarm IntelligenceBased Algorithm Int. J. Comput. Methods (IF 1.716) Pub Date : 20210120
Gaurang R. Rohit, Jagdish M. Prajapati, Vikram B. PatelThis paper sets propelling a more current strategy for mechanical shape optimization by joining a coupled finite element (FE) method–meshfree method (MM) with swarm intelligence (SI)based stochastic ‘zeroorder’ search procedure. The arranged gathering massively fits as a structural shape optimization since MM is utilized here for structural examination shape analysis and to avoid a remeshing in view

A Meshless Local Radial Point Collocation Method for Simulating the TimeFractional ConvectionDiffusion Equations on Surfaces Int. J. Comput. Methods (IF 1.716) Pub Date : 20210120
Yuanyang Qiao, Xinlong Feng, Yinnian HeThe timefractional problem is a class of important models to represent the real world. It is an open problem to study how the fractional operator acts on the surface. In this work, we present and analyze a meshless local radial point collocation method for numerically solving timefractional convectiondiffusion equations on closed surfaces embedded in ℝ3. The secondorder shifted Grünwald scheme

Nonlinear Interval Optimization of Asymmetric Damper Parameters for a Racing Car Int. J. Comput. Methods (IF 1.716) Pub Date : 20210120
Tian Chai, Xu Han, Jie Liu, Bing Zhou, Fei Lei, Fan LiUncertainties in parameters can affect racing car performance. In this study, a nonlinear interval suspension damping optimization method is proposed to improve the road holding of a racing car. To evaluate the dynamic responses of racing cars under a random road input and a bump input with interval uncertain parameters, a quarter car model with a twostage asymmetric damper is established. Then, a

Solving Engineering Optimization Problems Without Penalty Int. J. Comput. Methods (IF 1.716) Pub Date : 20210118
Sihem Zaoui, Abderrahim BelmadaniThis paper presents a constraint handling approach without the need to use a penalty function, namely Optimization Without Penalty (OWP). This approach is used on a recent optimization algorithm based on morphological filters, called Optimization by Morphological Filters (OMF). This work consists of providing a simple and effective constrainthandling approach without the necessity of the penalty for

Simulation and Optimization of Nonlinear Structures on Low Frequency Vibration and Noise of Lightweight Car Body Int. J. Comput. Methods (IF 1.716) Pub Date : 20210108
X. P. Xie, T. Chai, Q. SunAccurate models, optimization methods and improvement measures are three key issues in the design and optimization of complex structures in the field of vibration and noise. Due to the increase of passenger vehicle structure complexity and lightweight demand, nonlinear materials and structures increase obviously in the whole system. Not only different structural adhesives are used to strong body structures

ReliabilityBased Robust Design Optimization in Consideration of Manufacturing Tolerance by MultiObjective Evolutionary Optimization with Repair Algorithm Int. J. Comput. Methods (IF 1.716) Pub Date : 20210108
Gang Li, Ye Liu, Gang Zhao, Yan ZengThere are inherently various uncertainties in practical engineering, and reliabilitybased design optimization (RBDO) and robust design optimization (RDO) are two wellestablished methodologies when considering the uncertainties. Naturally, reliabilitybased robust design optimization (RBRDO) is a methodology developed recently by combining RBDO and RDO, in which the tolerances of random design variables

SteadyState Responses of Functionally Graded Piezoelectric Structures by the Coupled ThermalElectricalMechanical Inhomogeneous CellBased Smoothed Finite Element Method (CICSFEM) Int. J. Comput. Methods (IF 1.716) Pub Date : 20201228
Han Chen, Liheng Wang, Dongqi Li, Liming Zhou, Peng LiuTo accurately simulate the steadystate responses of a functionally graded piezoelectric structure (FGPS) and cure the “overlystiff” of finite element method (FEM), the coupled thermalelectricalmechanical inhomogeneous cellbased smoothed finite element method (CICSFEM) is proposed. The gradient smoothing technique is introduced into FEM and a “closetoexact” stiffness is obtained. Based on the

Regularization Strategies for Contiguous and Noncontiguous Damage Detection of Structures Int. J. Comput. Methods (IF 1.716) Pub Date : 20201228
Ziwei Luo, Ling YuRegularization strategies have attracted attention in the structural damage detection (SDD) field. However, there is lack of studies on regularization strategies for damage patterns in the existing methods. This paper proposes regularization strategies for contiguous and noncontiguous damages of structures and performs comparative studies. The objective functions are first defined to consider effects

Multiobjective Optimization of TwoDimensional Phononic Bandgap Materials and Structures Using Genetic Algorithms Int. J. Comput. Methods (IF 1.716) Pub Date : 20201228
Kepeng Qiu, Jianqiang JinIn this paper, twodimensional phononic bandgap materials are designed through multiobjective optimization using the genetic algorithm. Two cases are given. In Case I, 2D phononic crystals (PnCs) with maximum bandgap and minimum mass are optimized. The optimal results show that the thirdorder relative bandgaps become large, along with the increase in mass. In Case II, 2D local resonance phononic crystals

Overlapping MultiDomain Spectral Method for MHD Mixed Convection Slip Flow Over an Exponentially Decreasing Mainstream with Nonuniform Heat Source/Sink and Convective Boundary Conditions Int. J. Comput. Methods (IF 1.716) Pub Date : 20201228
Musawenkhosi P. Mkhatshwa, Sandile S. Motsa, Precious SibandaOverlapping multidomain bivariate spectral quasilinearization method is applied on magnetohydrodynamic mixed convection slip flow over an exponentially decreasing mainstream with convective boundary conditions and nonuniform heat source/sink effects. The method is employed in solving the transformed flow equations. The convergence properties and accuracy of the method are determined. The method gives

A Variant of ProjectionRegularization Method for IllPosed Linear Operator Equations Int. J. Comput. Methods (IF 1.716) Pub Date : 20201228
Bechouat Tahar, Boussetila Nadjib, Rebbani FaouziaIn this paper, we report on a strategy for computing the numerical approximate solution for a class of illposed operator equations in Hilbert spaces: K:E→F,Kf=g. This approach is a combination of Tikhonov regularization method and the finite rank approximation of K∗K. Finally, numerical results are given to show the effectiveness of this method.

One Identification Method of Distributed Dynamic Load Based on Modal Coordinate Transformation for Thin Plate Structure Int. J. Comput. Methods (IF 1.716) Pub Date : 20201228
Jinhui Jiang, Huangfei Kong, Hongji Yang, Jianding ChenLoad identification has long been a difficult issue for distributed load acting on structures. In this paper, the dynamic load identification technology based on the modal coordinate transformation theory is developed for dealing with identification problem of the twodimensional thin plate structure. For the distributed dynamic load acting on a plate, we decompose it with the mode functions in the

Hydrodynamic Study and Performance Analysis of the OC4DeepCWind Platform by CFD Method Int. J. Comput. Methods (IF 1.716) Pub Date : 20201219
Yang Huang, Yuan Zhuang, Decheng Wan(1) The RAOs of OC4DeepCWind platform motions are more sensitive to the lowfrequency wave than the highfrequency wave. The nonlinear motion responses for platform heave and pitch motions are comparatively remarkable. (2) The pitch motion of OC4DeepCWind platform is much more apparently influenced by the height of center of gravity (COG) than surge and heave motions. The lower COG height within

An Improvement of Probabilistic Feasible Region Method for ReliablityBased Design Optimization Int. J. Comput. Methods (IF 1.716) Pub Date : 20201219
Zihao Wu, Zhenzhong Chen, Ge Chen, Xiaoke Li, Xuehui Gan, Shenze WangThe decoupled methods for reliabilitybased design optimization (RBDO) problems are efficient and accurate. Sequential optimization and reliability analysis (SORA) method and probabilistic feasible region (PFR) approach are typical decoupled methods. When there are multiple constraints in RBDO problem, PFR method improves the efficiency of solving this problem by establishing the PFR to reduce the

Investigation on the Aerodynamic Efficiency of Braking Spoiler for High Speed Train Applications Int. J. Comput. Methods (IF 1.716) Pub Date : 20201219
M. Vikraman, J. Bruce Ralphin Rose, S. Ganesh NatarajanThe demand for high speed rail networks is rapidly increasing in developing countries like India. One of the major constraints in the design and implementation of high speed train is the braking efficiency with minimum friction losses. Recently, the aerodynamic braking concept has received good attention and it has been incorporated for high speed bullet trains as a testing phase. The braking performance

Characteristics of Earthquake Input Energy of a Subway Station Structure Based on Probability Density Evolution Method Int. J. Comput. Methods (IF 1.716) Pub Date : 20201219
Z. Q. Liu, Z. Y. Chen, H. ZhaoUnderstanding seismic energy input and dissipation mechanism is necessary for energybased seismic design of complex underground structures. Due to the intrinsic uncertainty of ground motion, stochastic methods are usually needed. In this paper, we study the seismic energy input and dissipation mechanism in an underground structure using the probability density evolution method (PDEM). It is found

Numerical Simulation of Viscous Flows Around a Surface Combatant Model at Different Drift Angles Using Overset Grids Int. J. Comput. Methods (IF 1.716) Pub Date : 20201219
Jianhua Wang, Zhenghao Liu, Decheng WanViscous flows around ship hull is of great complexity, and when the ship is advancing with drift angles, the flow field can be more complicated. In this paper, the viscous flow field around an obliquely towed surface combatant DTMB 5512 is computed using the unsteady Reynoldsaveraged Navier–Stokes (URANS) method. The numerical simulations are carried out by the inhouse CFD solver naoeFOAMSJTU,

ThreeDimensional Cartesian Grid Method for the Simulations of Flows with Shock Waves in the Domains with Varying Boundaries Int. J. Comput. Methods (IF 1.716) Pub Date : 20201217
V. V. Elesin, D. A. Sidorenko, P. S. UtkinThis paper is devoted to the development and quantitative evaluation of the properties of the numerical algorithm of the Cartesian grid method for threedimensional (3D) simulation of shockwave propagation in areas of varying shape. The detailed description of the algorithm is presented. The algorithm is relatively simple to implement and does not require solving the problem of determination of the

Numerical Simulating OpenChannel Flows with Regular and Irregular CrossSection Shapes Based on Finite Volume GodunovType Scheme Int. J. Comput. Methods (IF 1.716) Pub Date : 20201217
Xiaokang Xin, Fengpeng Bai, Kefeng LiA numerical model based on the SaintVenant equations (onedimensional shallow water equations) is proposed to simulate shallow flows in an open channel with regular and irregular crosssection shapes. The SaintVenant equations are solved by the finitevolume method based on Godunovtype framework with a modified Harten, Lax, and van Leer (HLL) approximate Riemann solver. Crosssectional area is replaced

An Optimized Explicit–Implicit TimeMarching Formulation for Dynamic Analysis Int. J. Comput. Methods (IF 1.716) Pub Date : 20201215
Delfim Soares Jr., Matheus M. RodriguesIn this paper, an optimized approach is proposed to enhance the performance of combined explicit–implicit timedomain analyses. In this context, an entirely automated explicitimplicit adaptive timemarching procedure is discussed as well as an optimization algorithm is introduced to compute the adopted timestep value of the analysis, so that the amount of explicit and implicit elements occurring

An Efficient Contact Search Algorithm for ThreeDimensional Sphere Discontinuous Deformation Analysis Int. J. Comput. Methods (IF 1.716) Pub Date : 20201214
Ganghai Huang, Yuanzhen Xu, Xiaofeng Chen, Jianjun Ma, Shu ZhangThe efficiency of contact search is one of the key factors related to the computational efficiency of threedimensional sphere discontinuous deformation analysis (3D SDDA). This paper proposes an efficient contact search algorithm, called box search algorithm (BSA), for 3D SDDA. The implementation steps and data structure for BSA are designed, with a case study being conducted to verify its efficiency

Analysis of Cracked Body Strengthened by Adhesively Bonded Patches by BEMFEM Coupling Int. J. Comput. Methods (IF 1.716) Pub Date : 20201214
Binh V. Pham, Thai Binh Nguyen, Jaroon RungamornratThis paper presents an efficient numerical technique capable of handling the stress analysis of threedimensional cracked bodies strengthened by adhesively bonded patches. The proposed technique is implemented within the framework of the coupling of the weakly singular boundary integral equation method and the standard finite element procedure. The former is applied to efficiently treat the elastic

A Novel Robust Remeshing Finite Element Technique for Fracture Propagation Int. J. Comput. Methods (IF 1.716) Pub Date : 20201214
L. D. C. Ramalho, J. Belinha, R. D. S. G. CampilhoIn this work, a novel and robust remeshing algorithm for crack opening problems is proposed, combined with triangular plane stress finite elements. In the proposed algorithm, the crack tip efficiently propagates until a preestablished maximum crack length is achieved and the crack propagation direction is defined considering the maximum tangential stress criterion. The stress state at the crack tip