Abstract In this paper, the stress response characteristics of the hydraulic composite pipe subjected to random vibrations were studied. Based on 3D-anisotropy elasticity, the motion equation of the hydraulic composite pipe was established by utilizing the Hamilton principle subjected to random vibration, and takes into account the fluid-structure interaction (FSI). The discrete analysis method of random vibration is employed to solve the random vibration under the excitation of white noise. Also, the effects of different parameters including external excitation, fluid velocity, fluid pressure and structural parameters on the stress response of composite pipe are investigated. Experimental results agreed with the simulation results, demonstrating that the analytical method could provide theoretical reference for the design, improved efficiency, and fatigue reduction of the composite pipe subjected to random vibration.

中文翻译：

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随机振动作用下液压复合管的应力响应

摘要 本文研究了液压复合管在随机振动作用下的应力响应特性。基于3D-各向异性弹性，利用哈密顿原理在随机振动作用下，并考虑流固耦合（FSI），建立了液压复合管的运动方程。采用随机振动离散分析方法求解白噪声激励下的随机振动。同时，研究了外激励、流体速度、流体压力和结构参数等不同参数对复合管应力响应的影响。实验结果与仿真结果一致，表明该分析方法可为设计提供理论参考，提高效率，