对于一个多自由度系统,其振动规律很复杂,但研究发现任何一个振型都是几个简单振型各自乘个系数然后加到一块儿的,这些个简单振型就是模态。模态质量就是指这个模态的指标好坏。
应用表明用有效模态质量进行模态识别,可以有助于找到尾轴架系统的固有频率和振型。
The practice application expresses that effective modal mass could be helpful to find natural frequency and vibration shape.
利用频响函数识别复频率模态质量存在着严重的数值计算不稳定性,给物理参数的识别造成困难。
The severe numerical instability in complex frequency modal mass identification from frequency response function makes it difficult to identify physical parameters.
模态是结构的固有振动特性,每一阶模态都具有特定的固有频率、阻尼比、振型、模态刚度和模态质量。
Mode is structure's inherence characteristics, each mode has specifically resonant frequencies, damping values, mode shapes, mode stiffness and mode mass.
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