Finite Element Analysis and Topology Optimization of a Shelter

摘要

To study the static and dynamic characteristics of a shelter,and reduce the weight of the shelter in the condition that it met the design requirements,the finite element model of the shelter was set up by the software HyperMesh,static and dynamic characteristics were studied by the FEA software MSC.Nastran,and the structural topology optimization of the floor panel was accomplished by the structural optimization software OptiStruct.The static analysis showed that the maximum stress of the shelter was far less than the admissible stress,and the maximum deformation was under the permissive value.The shelter structure satisfied the strength and stiffness design requirements,and was powerful to load more.Natural frequencies and mode shapes of the shelter were gained by the modal analysis.The excitation frequency should avoid its natural frequencies.Simultaneously,the places of the amplitude of vibrations should be reinforced.The weight of the shelter was reduced after the topology optimization design,and the distribution of the structure was more reasonable.The conclusions provided a significant contribution to the design of the shelter and improved its global performance.