环槽式万向联轴器多体动力学分析及仿真

【作者】 赵晓东；

【导师】 赵宁；

【作者基本信息】 西北工业大学 ， 机械设计及理论， 2006， 硕士

【摘要】 环槽式双万向联轴器是螺杆泵的重要动力传输部件,目前我国基本依赖进口,国内的设计手册中尚无相应的设计和计算方法。本文的研究为该联轴器的设计、使用提供了理论依据,具有重要的理论与实用价值。 根据空间机构的理论对环槽式万向联轴器进行机构分析,推导出基本运动规律、中间轴的载荷规律以及联轴器的效率公式。 基于ANSYS软件建立了中间轴的有限元模型,提出了中间轴的余弦规律的力学模型,根据中间轴的载荷规律使用ANSYS的APDL语言编程加载,进行了结构瞬态动力学分析,并与静力分析结果比较,得出中间轴的应力变化规律。 基于虚拟样机技术,采用多体动力学分析软件virtual.Lab建立了双联轴器多刚体系统虚拟样机,进行了运动学、动力学分析仿真,通过与理论值相比较,验证了多刚体虚拟样机的正确性。 在多刚体模型的基础上对中间轴进行柔性化处理,建立联轴器的刚柔耦合模型,进行其动力学分析及仿真,考察了联轴器的工作性能,得到了中间轴的动力学响应,并与结构瞬态动力学计算结构作了分析比较。 根据刚柔耦合分析得到的应力—时间历程结果,基于virtual.lab的疲劳分析模块进行了中间轴的疲劳分析,得到了中间轴疲劳损伤区域以及疲劳寿命。 常规的结构动力学分析方法将中间轴单独从联轴器系统中分离出来,简化后进行计算,计算结果和实际有一定差距。本文考虑到中间轴的柔性变形,首次对联轴器进行刚柔耦合分析,使中间轴的动力学计算更贴近实际,对该类联轴器的分析研究做了有益的探索。更多还原

【Abstract】 Circle-trough double universal joint is an important power transmission part of the screw pump, at present in our country this part basically depend on overseas importation, and there is no corresponding designing method in domestic design manual.This paper’s research provides the theoretical fundation for this universal joint’s design and the use, which has the important theoretical and practical value.Based on the theory of spatial mechanism, the mechanism analysis of circle trough double universal joint is conducted, the kinetic law, the law of load of the intermediate shaft and the efficiency formula of this universal joint as well are deduced.The finite element model of intermediate shaft is established based on ANSYS software, and its mechanic model of cosines law is proposed, by using ANSYS’s APDL language to program to load, the transient dynamic analysis of structure is conducted, the changing law of stress is obtained.Based on the virtual prototyping technology, and by adopting the multi-body dynamic analytical software virtual.lab, the multi-rigid body model of universal joint is established, kinematic and dynamic simulation of universal joint system is carried out. Through comparing the simulation results with the theoretical value, the correctness of this model is verified.Based on multi-rigid-body model, making the intermediate shaft flexible, the rigid-flexible coupled model of the universal joint is established.dynamic simulation of this virtual prototype is carried out, the operating performance of universal joint is analyzed, and the dynamic response of intermediate shaft is achieved.According to the result of Stress-time history of intermediate shaft, the fatigue analysis of intermediate shaft is conducted based on the fatigue analysis module of virtual.lab, the fatigue damage region and the fatigue life of intermediate shaft is got.In the conventional analytical method of structure dynamics, the intermediate shaft is always separated alone from the universal joint system, the computation is done after some simplification, and there are some error between its resulets and reality.taking into account the flexible deformation of intermediate shaft, this paper conducts the rigid-flexible coupled analysis of universal joint for the first time, which causes dynamic analysis of intermediate shaft to be closer to the reality, is the beneficial exploration into the research of this kind of universal joint’s anslysis.更多还原