摘要
在进行内燃机活塞-连杆-曲轴系统的多体系统动力学分析中考虑了曲轴主轴承和连杆两端轴承的流体动力润滑作用,建立了内燃机系统动力学与流体动力润滑耦合作用下的动力学分析模型.通过机械系统动力学分析软件ADAMS和自行编写的计算流体动力润滑程序之间的连接调用,进行了系统动力学与流体动力润滑耦合作用下的动力学分析.分析结果表明:在内燃机活塞-连杆-曲轴系统动力学分析中考虑油膜动力润滑作用后缸体的动态受力峰值降低,润滑油膜的动力耦合具有使缸体各部位受力趋于均匀化的作用.以不考虑油膜动力耦合作用的动力学分析作为设计依据的零部件设计具有过大的安全裕度,在内燃机零部件设计时考虑摩擦学与系统动力学的耦合是非常必要的.
An analysis model of coupling system dynamic behavior to bearing hydrodynamic lubrication in piston-rod-crank system in internal combustion engine is established. The numerical simulation of the model is presented through linking the solver of ADAMS software to FORTRAN program. In the simulation, the oil film forces in bearings are computed by solving Reynolds differential equation. After a simulation of five circles, the dynamic forces on engine block are received. By contrasting with the results of a model neglecting bearing lubrication, the coupling system dynamic behavior to lubrication can change the forces on engine block. Especially, the coupling effect can decrease the maximal values of the forces. Part designs based on no forces due to oil film lubrication acting on parts possess too large safety factors. It is very necessary to study the coupling dynamic behavior to oil film lubrication in the design of internal combustion engine.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2003年第1期56-59,共4页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(50175088,59990472).
