集装化包装运输系统动态响应的逆向子结构分析

Modeling and monitoring the dynamic response of multi-component coupled unitized packaging transport system have attracted increasingly more attention. Traditional methods for dynamic characteristics analysis, such as substructure technique, can predict the dynamic response of the system, but is not convenient for evaluation and diagnosis. Inverse sub-structuring approach is recently proposed to predict component FRFs, force transmissibility, and path contribution functions, but the existing method is for two-component coupled system, restricting its application in dynamic characteristics analysis, evaluation and control of multi-component coupled unitized packaging transport system. In this project, a new spectral-based formulation is proposed for modeling and monitoring the dynamic response of unitized packaging transport system, the main content includes: (1)First, the inverse sub-structuring approach for multi-component coupled unitized packaging transport system is derived theoretically based on a new high-precision system characteristic function; (2)Then, the proposed method is applied to predict the dynamic response of unitized packaging transport system and identify the key parameters and dominant transfer paths affecting the dynamic response of the system; (3)Finally, the system response control strategy is established and validated by a field test with a typical unitized packaging transport system. The research will provide new methods and theories for products protection during transportation.

对集装化包装运输系统的动态响应进行逆向子结构分析，反向确定各传递环节的贡献，识别主要控制参数，是解决集装运输下产品破损问题的关键。逆子结构将系统响应分解到各部件水平，可反向确定各传递环节的动态力传递率和贡献，但现有的方法是针对两部件耦合系统的，制约了其在多部件耦合集装化包装运输系统动态特性分析、评价与控制中的应用。本项目理论分析与实验相结合，(1)首先，寻找易于测量的高精度系统特性函数，理论推导基于该特性函数的多部件耦合集装化包装运输系统逆子结构方法；(2)在此基础上，基于所建立方法分析系统的动态响应，确定各传递环节的动态力传递率和贡献，识别系统动态响应的关键传递路径和主要控制参数，并据此建立系统动态响应的控制方法；(3)最后，结合典型集装化包装运输系统的现场测试结果修正和完善所建立的理论方法。研究成果为集装运输下产品防护设计提供新的理论依据，对解决产品物流破损具有重要工程价值。

逆子结构将系统响应分解到各部件水平，可反向确定各传递环节的动态力传递率和贡献，但现有的方法是针对两部件耦合系统的，制约了其在多部件耦合产品运输系统动态特性分析、评价与控制中的应用。本项目理论分析与实验相结合，(1)首先，将加速度频响与位移频响结合，理论推导基于加速度频响的多部件耦合产品运输系统逆子结构分析的分步解耦与直接解耦方法；(2)在此基础上，基于所建立方法分析产品运输系统的动态响应，确定各传递环节的动态力传递率和贡献，识别系统动态响应的关键传递路径和主要控制参数，并据此建立系统动态响应的控制方法；(3)最后，结合洗衣机-车辆运输系统的现场测试结果修正和完善所建立的理论方法。研究成果为集装运输下产品防护设计提供新的理论依据，对解决产品物流破损具有重要工程价值。