RSS拓补结构机座的动态优化  

Dynamic Optimization of the RSS Topology of a Structure Frame

作　　者：邓晗[1] 买买提明.艾尼 

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047

出　　处：《佳木斯大学学报（自然科学版）》2015年第3期432-436,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)(2007CB707706);国家自然科学面上基金(11072209);机械结构强度与振动国家重点实验室开放基金资助项目

摘　　要：以燃气轮机透平端RSS(旋转对称支承板)机座为研究背景,通过用D’Alembert原理建立了RSS机座的拓补优化域和等价边界条件,从而实现了用均匀化方法的RSS机座拓扑结构优化,得到了旋转对称的弧形支承板拓扑结构的机座.然后,结合原来RSS机座的机构特征在ANSYS workbench中建立了RSS拓补结构光滑有限元模型,并进行了工作条件下的模态分析,以前三阶模态振型中轴承座的振型作为当量静载荷加载到原模型对比计算,验证边界条件的正确性.以RSS机座弧形支承板的四个关键尺寸为设计变量,以机座的变形量和应力为目标函数,进行了随频率变化的动态优化设计.通过优化改变了RSS拓补结构的动态特性,使固有频率远离了工作频率.The gas turbine end RSS （ Rotationally Symmetric Struts） support was taken as the research background, the RSS support topology optimization domain and the equivalent boundary conditions were estab-lished using the principle of D＆#39;Alembert, and the topology optimization of RSS supports was realized using homog-enization method.The topological structure of rotationally symmetric arc-shaped struts supports were obtained. According to the institutional characteristics of the original RSS stand in ANSYS workbench smooth, the RSS to-pology structure finite element model was established.The working conditions of modal analysis before the third order modal vibration mode and the vibration mode of the bearing as the equivalent static load calculation com-pared to the original model validate the correctness of the boundary conditions.With RSS stand four key dimen-sions of arc plate as design variables to stand the deformation and stress as the objective function, change with frequency and dynamic optimization design was carried out.By optimizing the changed dynamic characteristics of the RSS topology structure, the inherent frequency is away from the working frequency.

关 键 词：RSS机座 拓补优化 当量静载荷 动态优化 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程] TU318[建筑科学—结构工程]