The Elastic Boundary Optimization Design for Cylinders Under Axial Compression
Stiffness of the rigid boundary is usually much more than the one of specimen in cylindrical axial compression experiment.But the stiffness of the real boundary is in keeping with the specimen.The difference of the stiffness between the real boundary and rigid boundary makes the experimental result disabled.This study discusses the difference of the two boundaries and reduces them.The difference of them has two sides.One is difference of material stiffness, and the other is the distribution of stiffness at the boundary of the specimen.In consideration of the cost of experiment, larger stiffness material is used in the optimization design.This means that the study is not evading the difference of the material stiffness and the distribution of stiffness is as the key in the optimization design.In order to describe the difference of the boundary, one suitable optimization object is needed in the design.The displacement vector after deformation of the boundary is defined as the optimization object in this paper.The displacement describes the stiffness of boundary and the vector describes the distribution of stiffness.So the optimization object represents the difference of the two boundaries.In this paper, one cylinder under axial compression is used as the specimen and another cylinder with holes is used as the real elastic boundary.The both cylinder’s materials are aluminum.The displacement vector is obtained as reference in the optimization design.The cylinder specimen and steel structure to be designed constitute the full structure to match the real one.The frame construction, cylinders with holes and cylinders without holes constitute the steel structure to be designed.The linear elastic analysis is used to obtain the displacement vector by ABAQUS.The summery of displacement vector’s variance of real boundary and to be designed boundary is the optimization object.The multi-islands genetic algorithms as the optimization algorithms are supported by ISIGHT.For the simple cylinder boundary with holes, the steel cylinders with the same holes are the best boundary.For the complex cylinder boundary with holes, the frame construction is the best boundary.
Equivalent stiffness Combined Tests Industrial Equipments Optimization Design
Bo Wang Kaifan Du Yunfeng Shi Bin Wang Xi Zhang
State Key Laboratory of Structural Analysis for Dustrial Equipments,Department of Engineering Mechan Beijing Institute of Astronautical Systems Engineering,Beijing,P.R.China
国际会议
黄山
英文
1-6
2012-06-18（万方平台首次上网日期，不代表论文的发表时间）