求解带阻尼围带或凸肩叶片动力特性的复模态方法  

A NEW METHOD OF EVALUATING THE DYNAMIC CHARACTERISTICS OF DAMPED BLADE WITH INTEGRAL SHROUD OR TIE WIRE

作　　者：季葆华[1] 丁家峰[1] 王乐天[1] 袁奇[1] 孟庆集[1] 

机构地区：[1]西安交通大学涡轮机教研室

出　　处：《机械强度》1998年第3期219-222,共4页Journal of Mechanical Strength

摘　　要：由于带阻尼围带或凸肩叶片（以下简称阻尼叶片）的运动方程中的阻尼矩阵是非解耦的矩阵，只有引入复模态理论才能圆满解决其特征问题的求解。文中用广义反迭代法求解此复特征值问题，并将复模态振型迭加法用于求解阻尼叶片的动力响应问题。通过分析求解结果，得出许多对工程实际有价值的结论。Since the damping matrix in the motion equation of damped blade is no longer decoupled as Rayleigh damping, so the complex mode theory is introduced in this paper to overcome the difficulty. The general inverse iteration method is obliged in the resolution of eigenproblem, and complex mode superposition method is applied to evaluating the response of damped blade. By analyzing the results of computing, we got some valuable conclusions for practical engineering.

关 键 词：阻尼 干摩擦 动力特性 复模态 叶片 汽轮机 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]