基于功率流的宽带复式动力吸振器优化设计

本文以简支薄板为主振系统，对其附加复式动力吸振器，提出以输入系统的净功率流在整个激励频带内的总声功率级为控制量的优化设计方法。通过算例，将普通动力吸振器与复式动力吸振器的吸振效果进行对比，揭示了复式动力吸振器适合于弹性体振动控制的宽带吸振性能；对复式动力吸振器结构参数优化以及结构参数与安装位置的联合优化设计的研究，表明吸振器的安装位置对其吸振效果影响很大；另外还研究了质量比与吸振效果的关系，为复式动力吸振器在弹性振动控制中的推广应用奠定了基础。

Optimum Design of Multiple Dynamic Vibration Absorbers of Continuous Parameter System Based on Power Flow

The control object is the total acoustic power level of net power flow input to the main system in whole excitation frequency band. An optimum design method of Multiple Dynamic Vibration Absorbers (MDVA) is studied. MDVA composed of several general single dynamic vibration absorbers (SDVA) is attached to the main system. In this paper,the main system is a simply supported panel. By compared with the effect of SDVA,the broad band performance of MDVA is presented.The structural parameters and position of MDVA are optimized.The results show that the setting position affects the effect of MDVA greatly. In addition,the relationship between the mass ratio of MDVA to the main system and the effect of MDVA is investigated in detail.The obtained results provide the basis for generalizing the appliance of MDVA in elastic structure.