结构声振研究的功率流方法

REVIEW ON STRUCTURAL VIBRATION POWER FLOW PREDICTION METHODS

功率流方法是近年来研究柔性结构动态特性的主要手段,其计算可分为低频段、中频段和高频段．本文讨论了有限元法、导纳功率流法、统计能量分析法、能量有限元法、参数化统计能量分析法、子结构法、Lagrange乘子混合法、有限元／统计能量分析混合法、有限元／功率流有限元混合法等方法,各种方法适用频段各不相同,综合应用这些方法,可以解决绝大多数声振预测问题．

It is a great advancement to solve vibro-acoustic problems using vibration power flow methods. A vibro-acoustic problem may fall into three different ranges： low frequency range, mid-frequency range and high frequency range. Finite element method （FEM）, mobility power flow method, statistical energy analysis method （SEA）, energy finite element method （EFEM）, parameter-based statistical energy method, sub-structure method, hybrid method based on Lagrange multiplier or FEM/SEA or FEM/EFEM are discussed in this paper. Because they have different ranges of frequency for application, these methods may be combined to solve a vibration problem.