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normal vibration 簡正振動。

normalcy

The measured tangential force , tangential inertial force and normal vibration acceleration are decomposed using a discrete wavelet transform . the relation among these three dynamics state variables is investigated 利用小波變換技術對測量的切向力、切向慣性力和法向振動加速度進行分解,對這些動力學變量之間的相互關系進行了深層次的研究。

The test result also displays that sometimes the normal vibration associated with squeal firstly occurs prior to the tangential vibration . the tangential vibration does not occur until the normal vibration gets stronger 試驗發現,有時發射摩擦噪聲的振動首先在法向出現,當這個法向振動比較強時,相同或相近頻率的切向振動才發生。

Analysis of the acoustic propagation properties under the sea with normal vibration method 用簡正波方法分析聲波在海水中的傳播特性

Mode of normal vibrations 正常振動模式