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中文摘要：
为研究轴承水平和垂直变刚度对船舶轴系横向振动的影响,在ANSYS中建立船舶推力轴系有限元模型,通过模态分析和谐响应分析,研究了艉轴承2个共轭方向变刚度时,轴系的横向固有振动频率以及横向受迫振动情况。研究结果表明：随着轴承某一方向的刚度降低时,该方向上横向振动的固有频率也降低,尤其是低阶频率,对应的谐响应振幅也随之降低,这对轴系低阶横向振动影响较为突出。该结果对通过改变轴系支撑刚度来抑制轴系振动提供了理论支持。
英文摘要：
In order to study the effect of horizontal and vertical stiffness of bearing on shafting transverse vibration, the finite element model of ship shafting was established with the software ANSYS. Through the model analysis and harmonious respones analysis, the change of shaft transverse vibration was analyzed through adjusting the stem tube bearing stiffness of two conjugate direction. The calculation resuhs show that as stiffness of bearing decreases at a certain direction, the transverse natural vibration frequency on this direction is reduced. The harmonic response amplitude decreases too, the effect on low order transverse vibration of shafting is obvious especially. It provides the theory support for suppressing the shafting vibration by changing the bearing stiffness.
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