基于有限元功率流的L型板振动传递特性

Research on vibration transmission characteristic of L-shaped plate based on fem power flow

基于有限元功率流理论,对L型板振动传递特性进行研究。对比导纳功率流法计算得到的输入功率和传递功率,两者计算结果吻合得比较好,证明方法是可行、准确的。提出了评价L型板振动传递的指标功率流传递率,从而定量描述L型板通过耦合边传递振动的能力。同时,给出功率流云图,直观得到能量在L型板中流动情况,并将功率流可视化技术应用到复杂的舱段结构中。本文处理方法对工程实际中复杂结构具有一定的通用性,可以为结构振动控制设计阶段提供一定的帮助。

Based on the fem power flow theory,research vibration transmission characteristic of L- shaped plate. Compare the input power and transmission power to the result from mobility power flow method. Two results agreeing with well proves that the method in paper is feasibility and exactly. Put forward the evaluation on the vibration transmission of L-shaped plate;describe the ability on transmission vibration across the coupled edge of L-shaped plate quantitatively. Meanwhile, give the power flow cloud pictures ; get the flow of energy in L-shaped plate intuitively;apply power flow visualization techniques to the complex structure of cabin. The method in paper is common to the complex structures in engineering practice, which is helpful to the design phase of structural vibration control.