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针对附加动力吸振器的连续参数系统,采用两端固支梁模拟连续参数主振系,利用结构导纳理论,引入振动系统的结构导纳修正矩阵和等价结构导纳矩阵,简化了系统的动态特性分析过程。在此基础上,推导系统各环节功率流的矩阵表达式。提出了以注入主阵系的净功率流为控制目标的动力吸阵器优化设计策略,并通过计算数值仿真验证了该方法的有效性。最后,探讨了振源位置对连续参数系统功率流传递特性、吸振器优化参数及其控制效果的影响。
Aiming at the continuous parameter system of additional dynamic vibration absorber, the continuous vibration system with continuous fixed beam at both ends is simulated, and the structure admittance correction matrix and equivalent admittance matrix are introduced by the theory of structure admittance, which simplifies the system Dynamic characteristics analysis process. On this basis, derive the matrix expression of power flow in each link of the system. The optimization design strategy of the power array with the net power flow injected into the main array is proposed. The numerical simulation shows the effectiveness of the proposed method. Finally, the influence of vibration source position on the power flow transfer characteristics, vibration absorber optimization parameters and the control effect of the continuous parameter system is discussed.