摘要
对模态试验中采用的柔性支承的特性（刚度和阻尼）识别和支承对模态参数影响修正方法作了研究。在常规的试验中，识别出刚体模态和所需的弹性模态，通过刚体运动拟合、系统矩阵识别和结构修改等途径，可识别出支承特性，并同时得到去除支承影响后的模态试验结果。通过一直梁的计算机仿真及试验，对方法作了检验。
A technique to identify stiffness and damping of flexible supports,and to correctthe effects of the supports on modal parameters is developed for modal tests.Through theordinary modal test,rigid body modes and required flexible modes are prelimlnarily estimated.By fliting the rigid body motion,calculatingsystem matrlces and structural dynamicsmodification,the stiffness and damping are identified.At the same time,the effects of thesupports on.the modal parameters are eliminated,and corrected modal parameters are obtamed.Simulation and experiment show the feasibility of the presented techniqe.
出处
《振动．测试与诊断》
EI
CSCD
1995年第3期15-22,共8页
Journal of Vibration,Measurement & Diagnosis
基金
航空基金
