基于多体动力学的CPC工艺链系统数值仿真分析

THE NUMERICAL SIMULATION OF CPC PROCESS CHAIN SYSTEM BASED ON MULTIBODY DYNAMICS

CPC工艺链被广泛用于汽车生产线的车身装配输送过程,运行过程中受到车组吊具重力、上坡阻力、摩擦阻力等综合因素的影响。为了缩短设计周期,验证设计的安全可靠性,该文首次将多体动力学仿真分析应用于CPC工艺链系统的设计,采用脚本语言建模的方法,自动完成了CPC工艺链整体系统的链条、导轨、车组吊具、驱动和张紧等装置之间的装配约束和载荷边界条件设定。在考虑构件间真实接触、摩擦等相互作用条件下,对某汽车装配线CPC工艺链系统进行了动力学仿真分析,求得了系统整体运行时所需驱动力大小、链条链节间相互作用力等动力学分析结果,并对CPC工艺链系统运行的平顺性和可靠性进行验证,建立了完整的CPC工艺链系统的数值仿真分析方法体系。该分析过程和方法对CPC工艺链及其他相似系统的整体设计具有重要的指导意义。

The CPC technology chain is widely applied to automobile production line. Its working performance is influenced by gravity, gradient resistance and frictional resistance, etc. In the first, muti-body dynamics simulation methods are applied to CPC technology chain design to cut down the design cycle and assure the reliability. With the scripting language modeling method, the settings are completed automatically to the constraints and load boundaries among chains, guide rails, work piece, drives and tensioning devices. A real CPC technology chain of car assembling line is analyzed to simulate the real contact and friction among the components. The result of dynamics analysis including the needed driving force while the whole system is under operation, the interaction force among chain links, and other mechanics results are obtained. In addition, the running smoothness and reliability of the whole system are tested and verified. Finally, the numerical simulation method of the CPC technology chain system is established. The process and methodology of this simulation has important guiding significance for the design of CPC technology chain and other similar system.