Robust configuration analysis and experimental study of cable supported hyperbolic flat latticed shell structure

Aiming at the problem that bad topological layout leads to poor structure robustness and based on the H2norm of system transfer function,quantitative evaluation index of structural robustness and robust configuration solving method were established firstly. Secondly,the relative densities of elements were chosen as design variables and the solid isotropic material with penalization( SIMP) model was used to describe the stiffness of the material,the robustness based structural design was transformed into continuum topology optimization. Then,the big bang-big crunch( BB-BC) method was improved by two-stage search and was used to solve the continuum topology optimization model. After that,taking cable supported hyperbolic flat latticed shell structure with four supports as an example,robust configurations under different load conditions were analyzed and the optimized effect of BB-BC method with different parameters was explored too. At last,comparative analysis between optimized model and conventionally designed model was conducted by static experiment and impact experiment. Results show that the two-stage BB-BC method can be well implemented for the robust design of cable supported structure,the improved BB-BC method can speed up the convergence,and arranging members based on the robust configuration can significantly increase the structure's mechanical property and anti-interference capability.