【摘要】 本文设计了一个用速度反馈实现粘性阻尼的结构振动系统并进行了实验和模态参数识别.实验模态分析结果表明,具有非比例阻尼的结构振动系统,在欠阻尼范围内,系统是可以成为亏损的;对于亏损系统,其频响特性只有用广义模态理论才能正确地描述.更多还原

【Abstract】 In the present paper, a structural vibration system with viscous damping which is simulated by a velocity fecdback is designed, the dynamical experiments and the modal parameter identifications are performed. The results of the experiments and the identifications show that the structural vibration system with non-proportional damping may become a defective system within underdamped case and frequency-response properties of a defective system can be correctly expressed only by the generalized mode theory.更多还原