• 1. Principal Frequency: 主频率
• 2. principal frequency of bandpass: 通频带主频
• 3. principal vibration frequency: 主振频率

更多释义

• 1.Dynamic characteristics of collaborated system mainly include natural vibration frequency and principal mode, which is the base and precondition of dynamic analysis for collaborated system.
  协作体系的动力特性主要包括体系的自振频率和主振型，它是协作体系结构动力分析的基础和前提。
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• 2.The natural frequency and vibration mode are the principal modal parameters representing structure dynamic behavior as well as the important basis for evaluating bridge dynamic performance.
  固有频率和振型是反映结构动力特性的主要模态参数，是评价桥梁动力性能的重要依据。
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• 3.This paper distinguishes principal noise source of the hoist, it is passed through-noise experiment and frequency analysis with the hoist.
  本文通过对提升绞车的噪声试验和频谱分析，鉴别了提升绞车的主要噪声源。
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