Research On ABAQUS-MATLAB Topology Optimization Integration Method And Crash Topology Optimization

Topology optimization is a method to optimize material distribution in the design area according to load conditions,constraint conditions and performance indicators,and is one of the important methods of conceptual product design.At present,many topology optimization methods are mainly written in MATLAB language,which can only optimize the topology of simple and typical cases and is difficult to be directly used in the topology optimization design of complex systems.However,commercial software represented by ABAQUS has strong finite element computing ability,especially in contact collision analysis.It is of great theoretical significance and practical application value to carry out the research of ABAQUS-MATLAB topology optimization integration framework and its platform to provide strong support for the topology optimization basic program to realize the rapid application of complex systems.This thesis proposes an ABAQUS-MATLAB topology optimization integration framework for model database files,which is different from the integration methods using third-party toolkits and input text file types,and is highly scalable,visualized,and stable;then,an ABAQUS-MATLAB topology optimization integration method based on the solid isotropic material penalty method(SIMP)is implemented.Then,the integrated ABAQUS-MATLAB topology optimization method based on the solid isotropic material penalty method(SIMP)is implemented,and the feasibility of the integrated method is verified by several typical numerical cases.Finally,a hybrid cellular automaton(HCA)crash topology optimization platform based on this integrated framework is developed to carry out the research on the topology optimization of the crashworthiness of the energyabsorbing box of an automobile.The main research contents of the paper are as follows:(1)Analyzed the ABAQUS file type and script interface,MATLAB language features,determined the overall scheme of ABAQUS-MATLAB topology optimization integration framework based on the model database file,elaborated the topology optimization principle of SIMP method and its relationship with the proposed integration framework,and provided theoretical and conditional support for the subsequent topology optimization integration method implementation.(2)The Python program,MATLAB program and its data transfer relationship required to establish the structural topology optimization integration method by SIMP method are studied,and the ABAQUS-MATLAB topology optimization integration method based on SIMP method is established,and the method is used to carry out topology optimization in the ABAQUS-MATLAB platform for two-dimensional simply supported beam,three-dimensional L-shaped shaped beam,multi-stress condition The topology optimization method is compared with the topology optimization results of SIMP method under the same conditions,and the effectiveness of the topology optimization integration method is verified.(3)The integrated crash topology optimization method based on the BESO method and the equivalent static load method is implemented,and the dynamic topology optimization of the solid-supported beam and cantilever beam cases under impact loading is carried out.The dynamic topology optimization for maximizing the stiffness of AL/CFRP automotive energy-absorbing box under impact loading is carried out using this integrated collision topology optimization method.(4)An integrated method of crashworthiness topology optimization based on the hybrid cellular automata method is implemented,and the feasibility of the crashworthiness topology optimization method running on the ABAQUS-MATLAB platform after using the integrated method is demonstrated by comparing the topology optimization results with those of typical algorithms.The effects of different update rules and automata neighborhood shapes on the topology optimization results are analyzed,and a crash topology optimization study is carried out for the car energy-absorbing box with the goal of improving the crashworthiness.