Engineering Analysis With Boundary Elements ( IF 3.3 ) Pub Date : 2020-04-23 , DOI: 10.1016/j.enganabound.2020.03.012 Yongtao Yang , Tao Chen , Hong Zheng
An improved NMM (Numerical Manifold Method) with mathematical cover refinement (RNMM) is adopted to investigate the stability of a SRM (soil-rock-mixture) slope. In the RNMM, refined mathematical meshes are deployed at specified domains where stress concentration may occur. Compared to the TNMM (Traditional NMM), the computational efficiency of the RNMM is better for slope stability problems. Besides, the recently proposed scheme called MLC (mathematical cover systems with multiple layers) is adopted to further improve the computational efficiency of the RNMM. Based on the proposed RNMM+MLC (RNMM with MLC), stability analyses about two typical examples including a soil slope and a SRM slope are investigated. The numerical results demonstrated that: 1) The FOS (factor of safety) based on the proposed RNMM is better than that based on the TNMM; 2) The FOS based on the RNMM + MLC is almost the same to that based on the RNMM, but the computational efficiency of the RNMM + MLC is better than that of the RNMM; 3) The distribution mode of plastic zones in a SRM slope differs a lot from a soil slope.
中文翻译:
土石混合体边坡稳定性分析的数值流形方法的数学覆盖改进
采用改进的NMM(数值流形方法)和数学覆盖精化(RNMM)方法来研究SRM(土石混合体)边坡的稳定性。在RNMM中,精炼的数学网格被部署在可能出现应力集中的指定区域。与TNMM(传统NMM)相比,RNMM的计算效率更好。此外,采用了最近提出的称为MLC(多层数学覆盖系统)的方案,以进一步提高RNMM的计算效率。基于提出的RNMM + MLC(带有MLC的RNMM),对包括土坡和SRM坡两个典型实例的稳定性进行了研究。数值结果表明:1)基于RNMM的FOS优于基于TNMM的FOS。2)基于RNMM + MLC的FOS与基于RNMM的FOS几乎相同,但是RNMM + MLC的计算效率优于RNMM。3)SRM坡度中塑料区域的分布模式与土壤坡度有很大不同。