...U札D(口)一cosn(O一拳D) (4) 这里 庐D=≠c+万//27z (5) 1.3圆环的受迫振动 根据模态振型叠加原理(mode superposition principle),系统的振动响应是各阶振动模态的线性叠 加。
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The second chapter introduces the basic principle and the correlation knowledge of moving load identification, including mode shape orthogonality, mode superposition principle and so on.
第二章介绍了移动荷载识别的基本原理和相关知识，包括振型的正交性，模态叠加原理等。
This method is based on the superposition integration principle. It is quite simple and useful. It avoids the complicated works for system mode building.
该方法基于叠加积分原理，简单实用，并避免了对系统建模的复杂过程。
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