摘要
本文利用经典统计能量平衡方程的形式研究了非保守耦合系统的能量平衡机制，从而得到了等效内损耗因子的计算公式；同时给出了等效内损耗因子的工程计算方法。以双振子非保守耦合系统为例，通过数值计算，研究了耦合参数对等效内损耗因子的影响。结果表明：等效内损耗因子出现负值是非保守耦合系统能量平衡的必然结果。
Abstract: Using energy balance equations in classical Statistical Energy Analysis(SEA), the energy balance mechanism of non-conservatively coupled systems is studied, and calculating formulae of equivalent internal loss factors for non-conservatively coupled systems are derived. At the same time, the methods of engineering calculating of equivalent internal loss factors are given. By taking the two non-conservatively coupled oscillators for example, the influences of coulping parameters on equivalent internal loss factors are studied. From the analytical results, it is shown that negative internal loss factors result from energy balance of non-conservatively coupled systems.
出处
《声学学报》
EI
CSCD
北大核心
1997年第6期555-561,共7页
Acta Acustica
基金
国家自然科学基金
关键词
等效内损耗因子
非保守耦合系统
能量平衡
Acoustic wave effects
Energy dissipation
Internal friction
Numerical methods
Oscillators (electronic)
Statistical methods
