摘要
主要讨论振动系统的阻尼矩阵估计问题 先将阻尼矩阵C按Liang的理论表达为系统的质量与刚度矩阵M、K的多项式 ,并用多项式的前几项近似表达阻尼矩阵即能导出复模态 ,文中解释了多项式各项的物理意义 ,利用估计模型应具有的动态传递函数应尽可能与实测值一致的原理 ,构造了一个利用动态试验数据确定多项式各种系数的优化估计算法 。
This paper presents a method to estimate the damping matrix of structural dynamic systems.Based upon the way of Liang,the damping matrix is expressed as polynomial combination of the matrixes of the system's mass and stiffness.The first 3 items of the polynomial combination can express non proportional damping,and every item has clear physical meaning.By means of the identical frequency responses of a model and its experiment,an estimation method is dereloped based on dynamic test data.A numerical example is given to demonstrate the efficiency and accuracy of the method.
出处
《广东工业大学学报》
CAS
2001年第3期6-11,共6页
Journal of Guangdong University of Technology
基金
国家自然科学基金项目资助 (5 9685 0 0 3)
