摩擦力作用下推进轴系弯—扭耦合振动特性分析-应用生态学报-上海.pdfVIP

4 摩擦力作用下推进轴系弯—扭耦合振动特性分析 2013 年10 月 文章编号：1006-1355(2013)05-0004-06 摩擦力作用下推进轴系弯—扭耦合振动特性分析 覃文源，张志谊，华宏星 （上海交通大学 机械系统与振动国家重点实验室，上海 200240 ） 摘 要：推进轴系的艉轴承负荷受螺旋桨、轴系对中等因素影响，不合理设计或安装可能导致轴承润滑不良，使轴 颈与橡胶轴承间容易存在“粘着—滑动”状态，进而导致轴系的弯曲、扭转振动异常。通过简化的推进轴系模型，从机 理上分析轴系在艉部橡胶轴承摩擦力作用下的弯-扭耦合振动特性及其主要影响因素，为识别轴系异常振动和噪声提 供参考。 关键词：振动与波；推进轴系；弯—扭振动耦合；自激振动 中图分类号：U664.2 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1335.2013.05.002 BendingBending andand TorsionalTorsional CoupledCoupled VibrationVibration ofof aa PropulsionPropulsion ShaftingShafting SystemSystem ExcitedExcited byby FrictionFriction ForceForce QIN Wen -yuan , ZHANG Zhi-yi , HUA Hong -xing ( State Key Lab of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China ) AbstractAbstract :: The load state of stern bearing of the propulsion shafting system is affected by the alignment between propeller and shafting. Unreasonable design or poor installation of the shafting system can result in poor lubrication of the rubber bearing, which can cause the stick-slip motion between the shaft and the bearing, and abnormal bending and torsional vibration of the shafting system. In this paper, the bending and torsional coupled vibration induced by the friction between the stern bearing and the propulsion shaft was analyzed theoretically based on a simplified propulsion-shafting system. The characteristics of friction induced shaft vibration and noise were revealed. KeyKey wordswords :: vibration and wave ; propulsion shafting system ; coupling of bending and torsional vibration ; self-excited vibration