Topology optimization for prestressed cable-truss structure considering geometric nonlinearity

Xiangji Li, Jihong Zhu, Jie Wang, Weihong Zhang

科研成果: 期刊稿件文章同行评审

5 引用 (Scopus)

摘要

This work presents a topology optimization method for prestressed cable-truss structures considering geometric nonlinearity. Based on the large deformation kinematics theory, we establish a multi-node cable element model, which can fully take into account the geometric nonlinearity caused by external loads and prestress. Besides, nonlinear hyperelasticity principles are used to deal with cable materials’ unidirectional stress characteristics. To consider the impact of prestress on the global structural stiffness, we carried out the rebalancing of prestress and construct an objective function of prestress-modified compliance. Then, we equate the cable-truss structure as a particular two-phase material structure and realize the material interpolation based on a discrete material optimization-like method. Finally, we perform the adjoint sensitivity analysis of the objective function and solve the optimization problem through the gradient-based algorithm. Therefore, we establish a topology optimization method for prestressed cable-truss structures with stiffness as the objective, continuous density/size parameters as variables, and mass fraction as constraints. This method’s feasibility and reliability are demonstrated in 2D and 3D numerical examples.

源语言英语
文章编号201
期刊Structural and Multidisciplinary Optimization
66
9
DOI
出版状态已出版 - 9月 2023

指纹

探究 'Topology optimization for prestressed cable-truss structure considering geometric nonlinearity' 的科研主题。它们共同构成独一无二的指纹。

引用此