有阻尼结构线性振动系统的模态综合

研究了线性阻尼结构振动系统的模态综合技术．在线性阻尼结构振动系统实变换进行方程解耦的还原变换的基础上，构造了线性阻尼结构振动系统的固定界面模态综合方法。这一方法克服了以往的模态综合法中无法同时给出子结构刚度、阻尼和质量矩阵，以及只能给出复系数时域方程等不足，可直接给出子结构经模态降阶后的刚度、阻尼和质量矩阵。综合得到的整体方程仍是时域中的实系数二阶振动方程。数值算例表明了本文方法的正确和可行。

Component Modal Synthesis for Linearly Damped Vibration Systems

Based on new modal transformation firstly derived for large complex stru ctures, a new component synthesis method is developed in this paper, which can d irectly give the stiffness, damping and mass matrices for the substructures. The equa tions assembled after synthesis still have the similar form to the original equ ations. The numerical example verifies that the method developed in this paper i s very effective for reducing the system degree of freedom and deriving the dynam ic model for large structures.