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.
出处
《机械设计与制造》
北大核心
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)
关键词
瑞利阻尼
多体结构
动响应分析
Rayleigh damp
Multi-body structure
Dynamic response analysis
