摘要
本文用理论和实验相结合的方法研究了具有干摩擦阻尼结构叶片（以下简称阻尼叶片）的动力特性，给出了一种采用扭曲梁单元来离散叶片的有限元分析模型，并采用谐波平衡法简化了阻尼端干摩擦力的数学表达，建立了阻尼叶片的有限元动力方程。用所建立的模型计算了实验平板叶片的动力特性，计算结果与阻尼叶片的实验数据进行了比较，验证了理论模型的正确性，得出阻尼接触端正压力存在一个最优值，在此值下阻尼器的减振效果最好，并得出激振力的大小会影响最优正压力的值。
The dynamic characteristics of dry frictionally damped blade have been studied with theoretical and experimental methods. A finite element model of damped blade by adopting twisted beam element is feristly developed, which can be employed to simulate the blade perfectly by using a few elements. Then the dynamic characteristics of a test blade is analyzed through the finite element method, and the results of computation are compared with experimental results, the consistence between them have poven the theoretical model. At last, a conclusion is drawn that there is an optimum normal force between the rub surfaces of dampers, and external exciting force can influence the value of optimum normal force.
出处
《热力发电》
CAS
北大核心
1997年第6期7-13,共7页
Thermal Power Generation
