界面响应不可测的刚性耦合系统逆向子结构分析  

Inverse sub-structuring theory of rigid coupling system with incomplete measured data

作　　者：王启利 王军[1,2] 孙中振 卢立新 

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《振动工程学报》2016年第4期603-608,共6页Journal of Vibration Engineering

基　　金：江苏省自然科学基金资助项目(BK20151128);国家自然科学基金资助项目(51205167);中央高校基本科研业务费重点资助项目(JUSRP51403A);教育部博士点基金资助项目(20120093120014);江苏省青蓝工程资助项目(2014)

摘　　要：获取产品运输系统的动态响应特性是进行缓冲包装设计的关键,逆子结构理论是一种在线预测部件频率响应函数的方法,大多数机电类产品的物流运输是通过螺栓等方式与货车、轮船等运载体直接刚性连接。由于耦合界面处物理空间的限制或者脆弱部件的干扰,难以在此同时进行激振和拾振,使得测量信息面临不完备的风险,传统的逆子结构理论是基于测量信息完备基础上的。提出利用虚拟质量法来获取耦合界面处难测频响函数的方法,建立基于虚拟质量法的界面响应不可测的刚性耦合逆子结构理论。然后利用集总参数模型对该理论进行了验证,结果显示预测值与计算值完全吻合,最后通过物理模型实验对该理论在实况条件下的有效性进一步验证。该方法为子结构解耦问题中的测量信息不完备问题提供了一种思路。Inverse sub‐structuring theory has been an easy but efficient method applied for inverse analysis of the frequency re‐sponse functions （FRFs） of product transport system ,However ,the coupling interface between product and vehicle is ex‐tremely complicated and diversified for most of mechanical product transport system .The system‐level FRFs from coupling de‐gree of freedoms may not be measured accurately because of the difficulties of vibration excitation and response measurement for the coupled interface between components within the limited accessible space .Incomplete measured data is becoming the biggest problem for the traditional inverse‐structuring theory .In this paper ,A so called dummy masses method is applied for predicting the unmeasured FRFs from coupling degree of freedoms .The new FRF‐based indirect inverse sub‐structuring meth‐od for two‐substructure rigid coupling system with incomplete measured data based on dummy masses is built .The theory is verified with a lumped parameter model ,the results showed exact agreement between predicted values and calculated ones . Then a physical prototype of rigid coupled system is performed to further check the accuracy of the suggested method ,showing exact agreement .The proposed method shows its great application prospect in coupled mechanical system with incomplete measured data .

关 键 词：逆子结构 频响函数 刚性耦合 虚拟质量法 

分 类 号：TB485.3[一般工业技术—包装工程]