The Application Of The Topology Optimization Theory In Optimal Design Of Arch Dam

Optimal design has occupied an important position in the modern design of the structure,It can obtain a more perfect or suitable optimal design from the large number of programmers,It is a important links of a virtual design and manufacturing, throughout the development and production process. Recently, topology optimization is the most challenging and hot,as well as difficult research topic in structure optimization.It usually needs to determine many more parameters than size optiminization and shape ptiminization,however,It can be obtained more benefit so that It is more attractive for design engineers. With the development of this theory,It is being applied to engineering practice gradually.After reading numbers of the foreign documents and domestic relative paper, the basic theory and methods of continuum structural topology optimization is deeply studied, and It is applied of arch shape optimal design.Specific study are as follows:(1)The continuum optiminzation were deeply stduied. and methematical models of topology optimization in homogenization method, varible-density method and varible-thickness method were discussed and analyzed. The specific methods of hydor-structure-optimization are designed by homogenization method used in topology optiminzation.On basis of microstructure cell, the methematical model of homogenization method and number calculation of finite element are explained.(2)Through the study of the arch dam form of the rational spacial distribution,Under meeting constraints of arch dam, with the object of the minimum volume, the topology optiminzation of arch dam with the distributed loading is researched.Based on the finite element analysis software of ANSYS,a univerisal topology optimization program is exploited,which realizes topology optiminzation of arch dam from the point of the view of technique.(3)Three-dimensional finite element stress analysis of arch dam has a phenomenon of stress concentration, the distortion of the arch dam stress occurred in the edge of the arch dam. The command stream of equivalent stress calculated equivalent stress of the edge of the arch dam to checking whether the dam to meet the ends of stress specifications. (4)By using topology optimization theory,the arch dam form optiminzation design is made.the topology optiminzation of the arch dam is accomplished, all the result are satisfied,which indicates that topology optimization method of the coninuum structure is fit for the optimization design of the arch dam.