节圆（Pitch Circle）:两齿轮连心线上咬合接触点各齿轮上留下轨迹称为节圆. 节径（Pitch Diameter）:节圆直径. 有效齿高（Working Depth）:一对正齿轮齿冠高和.
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... nodal diagram (叶片)节点振动图，(叶轮)节园振动图 nodal diameter 节径 nodal diffusion-depletion calculation 节块的的扩散-贫化计算 ...
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分析了节径振型和节圆振型间的关系和出现规律。
The relationship between the vibration modes of node-diameter and node-circle and the law of their emerging are investigated.
此外，这种差异也存在于节径增加和节径减少阶段。
Moreover, differences also exist between the pitch radius increasing phases and pitch radius decreasing phases.
计算结果表明，几何非线性使薄壁圆柱壳产生硬化，其非线性频率升高，并同时讨论了线性、非线性频率与节径数及初始位移之间的关系。
Results show that nonlinear frequencies increase with effect of large geometric deformation taken Relationships among linear frequencies, nonlinear frequencies and initial displacements are discussed.
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