基于振动响应场的结构形状优化方法研究  

A Method of Structural Shape Optimization Based on Vibration Response Fields

作　　者：臧献国[1] 于德介[1] 姚凌云[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《中国机械工程》2010年第14期1643-1646,共4页China Mechanical Engineering

基　　金：国家863高技术研究发展计划资助项目(2009AA04Z414);长江学者和创新团队发展计划资助项目(531105050037)

摘　　要：建立了基于有限元网格的参数化形状优化模型,提出一种基于振动响应场的结构形状优化方法,以控制结构振动。该方法选取一组振动峰值处的振动响应场作为结构形状参数化模型的向量场,用一组向量场的线性组合定义修改区域的形状优化函数,以振动响应场的系数为设计变量,结合遗传算法优化结构形状以减小结构振动。研究了外部激励下的结构形状优化。数值算例表明该方法可以有效控制结构振动。A parameterized shape optimization model was established based on finite element meshes and a structural shape optimization method was presented based on vibration response fields for controlling the structural vibration.In this method,according to a group of vibration response peaks,vibration response fields were chosen as the vector fields of the parameterized shape optimization model.The shape optimization function of modification domain was defined using a linear combination of a group of vector fields,and each coefficient of vibration response fields was used as a design variable.The structural shape was optimized using the genetic algorithm to decrease the structural vibration.Structural shape optimization was studied under excitation. The numerical example shows that structural vibration can be controlled effectively.

关 键 词：振动响应场 形状优化 结构优化 遗传算法 

分 类 号：TB53[理学—物理]