多体结构瑞利阻尼系数的确定  

Calculation for the rayleigh damping coefficients of multi-body structures

作　　者：王德铎[1] 张艳平 闫军[1] 孙启国[3] 

机构地区：[1]兰州交通大学机电技术研究所,兰州730070 [2]河南中光学集团,南阳473003 [3]北方工业大学机电工程学院,北京100144

出　　处：《机械设计与制造》2010年第1期230-231,共2页Machinery Design & Manufacture

基　　金：甘肃省自然科学基金项目(ZS031-B25-009-G)

摘　　要：多体结构时域动响应分析广泛采用瑞利比例阻尼,其阻尼系数一般根据系统的质量和初始刚度确定,其确定过程有很多不确定因素。从基本概念出发,推导瑞利阻尼的基本表达形式,提出了用线性插值方法计算阻尼比,来获取多组数据,做图拟合推算出较为准确的阻尼系数。并结合算例说明该方法可行。Rayleigh proportion damping model is widely employed in time-domain dynamic response analysis, and its coefficients are usually determined according to the system mass and initial stiff- ness, but there are still existing uneertain factors in this process. It the expression of Rayleigh damp is de- rived from the basic concept, the linear interpolation method is developed to calculate the damping ratio and obtain multi-group data firstly, and then to make the chart in order to calculate the more accurate damping coefficients, in the end try to apply this method to a case and conclude that it is practical and feasible.

关 键 词：瑞利阻尼 多体结构 动响应分析 

分 类 号：TH113[机械工程—机械设计及理论]