It is verified by means of model test that the ship vibration is caused by the propeller-excited force, which is generated by the propeller running in the non-uniform stern flow field.
并通过模型试验进一步证实该船振动的成因主要是由于螺旋桨在不均匀流场中运转时产生的激振力所致。
Most of the natural river flows are non-uniform, but the start and the starting velocity drag force formula for formulas are based on uniform flow up.
天然河流大多属于非均匀流，但起动拖曳力公式和起动流速公式都是在均匀流的基础上建立起来的。
An expression of energy difference rate in a plate of non-uniform thickness with a crack of mixed mode under both body force and surface tractions in a non-uniform temperature field is derived.
本文推导出了含复合型裂纹的变厚度板在承受体力和面力、存在非均匀温度场的情况下的能量差率表达式。
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