The paper induces the displacement of the model of vibration,strain and stress expansion formula,introduces the classification approa-ches of the vibration mode,analyzes the influential law for the height-width ratio on the structural vibration mode according to the geometric judg-ment standard of the mode,and achieves some valuable conclusion,so as to provide some reference.%推导了基于振型的位移、应变和应力展开公式，介绍了振型的分类方式，并根据振型的几何判别标准，分析了高宽比对结构振型的影响规律，得出了一些有价值的结论，以供参考。
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