CAJ | 학술논문

研究阻尼板黏弹减振优化方法，为阻尼板设计奠定一定基础。建立了阻尼板运动方程及其求解模型，推导出模态阻尼比敏度算式；构建了以多模态复合模态阻尼比最大、黏弹材料用量及频率变动最小为约束的阻尼板优化模型，采用拓扑渐进法求解优化模型；引入绕单元敏度均化技术解决优化迭代中的棋盘格问题；在引入虚拟单元及逻辑删除技术基础上，编程实现了渐进优化算法；对任意四边形板进行了优化仿真，实现了该板复合阻尼比最大化设计；引入阻尼比体积密度评析拓扑优化效能。研究表明，在阻尼板设计时若实现其多模态阻尼比最大化，则能使板获得良好减振效果。
연구조니판점탄감진우화방법，위조니판설계전정일정기출。건립료조니판운동방정급기구해모형，추도출모태조니비민도산식；구건료이다모태복합모태조니비최대、점탄재료용량급빈솔변동최소위약속적조니판우화모형，채용탁복점진법구해우화모형；인입요단원민도균화기술해결우화질대중적기반격문제；재인입허의단원급라집산제기술기출상，편정실현료점진우화산법；대임의사변형판진행료우화방진，실현료해판복합조니비최대화설계；인입조니비체적밀도평석탁복우화효능。연구표명，재조니판설계시약실현기다모태조니비최대화，칙능사판획득량호감진효과。
To develop theoretical instructions for vibration suppression design of damped plates ,a topology optimization method for the plates was presented .Firstly ,a dynamic equation for a plate was proposed and a FEM solution to the equation was given ,so that the plate's modal ratio model could be derived .T hen ,oriented to maximizing multiple modes'damping ratios ,and aimed to make use of damping materials as less as possible and to remain the plate's modal frequency ba‐sically unchanged as well ,a topology optimization model was built for the plate .Moreover ,the modal damping ratio sensitivity was derived ,and evolutionary method was employed to solve the optimization model , which used weighted mean of modal ratio sensitivity to determine the elements'deletion ,so as to avoid checkerboard layout of damping materials in optimization .Fi‐nally ,a program was accomplished for optimization ,so that simulations could be executed on a quadrilateral plate ,which validated the optimization method proposed well .Simulations show that a damping plate can obtain better vibration suppression effects ,as long as the damping mate‐rials distribution on the plate can make multi‐mode damping ratio maximize .