润滑耦合下冲击引起的轴系弯扭振动特性分析  

Analysis on the property of ship shafting bending-torsion vibration coupling with bearing lubrication under impulse load

作　　者：朱汉华[1] 张绪猛[1] 刘正林[1] 严新平[1] 温诗铸[2] 范世东[1] 

机构地区：[1]武汉理工大学能源与动力工程学院,武汉430063 [2]清华大学摩擦学国家重点实验室,北京100084

出　　处：《船舶力学》2010年第1期126-131,共6页Journal of Ship Mechanics

基　　金：国家自然科学基金(50675162;50479016);校博士科研起动金资助

摘　　要：船舶推进轴系的弯扭振动与支承轴承的润滑油膜相互耦合,互相影响。文中给出了轴承的润滑方程及润滑与弯扭振动耦合的运动方程,通过数值计算,研究了润滑油粘度对轴系振动的影响。从计算的结果可知:在冲击载荷的作用下,弯扭振动响应随粘度增大而减弱,振幅衰减加快,冲击作用对轴系振动干扰时间缩短。同时,润滑粘度愈低,弯扭耦合性愈强,振幅改变愈大,互激励愈明显,而在高粘度条件下,轴系的弯扭耦合性减弱,扭转振动受冲击载荷的影响不明显,而弯曲振动受冲击载荷的影响明显存在。It is coupled and influenced each other between the bending-torsion vibration of ship propulsive shafting and journal bearing lubrication oil. The bearing lubrication equation and the coupling dynamic equation between bearing lubrication and bending-torsion vibration of ship shafting are given in this paper. The influence relationship of bearing lubricant oil viscosity to the shafting vibration is investigated by the numerical method.The calculation results show that applying impulse load on the shafting and increasing lubricant oil viscosity, the response of bending-torsion vibration decreases, vibration amplitude attenuates quickly, and the duration of shafting vibration action motivated by impulse load becomes short. When the oil viscosity is lower, coupling function of bending-torsion vibration becomes stronger, amplitude changes bigger, and the influence of them is more obvious. But when the oil viscosity is bigger, coupling function of bending-torsion vibration becomes weaker,it is not obvious the influence of impulse load to shafting torsion vibration while it is bigger still the influence of impulse load to shafting bending vibration.

关 键 词：船舶推进轴系 轴承润滑 耦合作用 数值分析 弯扭振动 

分 类 号：U661.44[交通运输工程—船舶及航道工程]