设计简介
摘 要：本仿真课题的设计原型属于一种农业机械变速器用差速器，具体涉及一种滑动齿轮式差速器。在熟悉该差速器的运行原理后，基于UG操作平台，研究了建模的通用方法，提出了机构传动时虚拟装配的方法，通过UG与ADAMS的数据交换接口把模型的几何数据导ADAMS中建立了差速系统的动力学模型，通过对左右轮所受阻力的情况分析，通过对两种工况即直线行驶和拐弯行驶工况进行仿真计算，验证了该差速器建模及传动系统建模过程的合理性。但针对复杂的机械系统，要想准确的控制运动，仅依靠ADAMS软件自身也很难做到。为了提高仿真结果的可靠性,在现有UG建模的基础上,把滑动齿轮式差速器模型从 UG导入ADAMS/View中, 并对各连接点添加相应约束、反复修正参数之后进行了仿真,得到了左右差速轮的加速度曲线、速度曲线，得出速度差。分析研究结果表明,该差速器在给定条件下基本上符合设计要求。
关键词：差速器；虚拟样机；动力学分析
Abstract:The prototype of the simulation topic is an agricultural mechanical transmission with differential, and particularly relates to a sliding gear differential. After familiar with the operation’s principle of the rear differential,base on the UG operating platform, research the general method for modeling,proposed the method of virtual assembly when the mechanism drives.Importing geometric data model into ADAMS by using the UG and ADAMS data exchange interface,then build differential system dynamics model.Through the left and right wheels of drag analysis of the situation，through the two conditions that straight running and cornering driving conditions are simulated, verified the differential transmission system model and the modeling process is reasonable.However, for complex mechanical systems, in order to accurately control the movement, rely solely on ADAMS software is difficult to do. In order to improve the reliability of the simulation results, on the basis of UG existing modeling,then sliding teeth do differential model is imported to ADAMS / View from the UG software , and adds a corresponding constraint on each of the connecting points, then simulate after repeated correction parameter.Get the left and right wheel accelerated velocity curve、velocity curve of the differential then draw speed difference curve.The analysis results show that, in the given conditions,the differential basically meet the design requirements.
Key words: Differentials;Virtual prototyping; Kinetic analysis
目 录
摘要……………………………………………………………………………1
关键词…………………………………………………………………………1
1前言………………………………………………………………………………2
1.1研究背景……………………………………………………………………2
1.2机械系统动力学分析与仿真及数字化功能样机……………………………3
1.2.1机械系统动力学分析与仿真…………………………………………………3
1.2.2数字化功能样机………………………………………………………………4
1.2.3数字化功能样机软件系统……………………………………………………7
1.2.4研究现状和发展趋势 ………………………………………………………8
1.3本文要研究的主要内容…………………………………………………………9
2 ADAMS动力学建模与求解………………………………………………………10
2.1 ADAMS采用的建模方法………………………………………………………10
2.2 ADAMS的方程求解方案………………………………………………………13
2.3 ADAMS采用的碰撞模型……………………………… ………………………16
3 数据建模…………………………………………………………………………17
3.1主要系统功能分析……………………………………………………………17
3.2 ADAMS建模……………………………………………………………………20
3.2.1 UG建模（以中心齿轮为例）………………………………………………20
3.2.2 模型导入ADAMS…………………………………………………………22
4 ADAMS运动分析仿真……………………………………………………………24
4.1基本工作………………………………………………………………………24
4.1.1 绘制地板……………………………………………………………………24
4.1.2 添加运动幅…………………………………………………………………26
4.1.3 添加驱动力力矩……………………………………………………………28
4.2两种情况分析定义……………………………………………………………29
4.2.1 等速行驶(两轮阻力相同)…………………………………………………30
4.2.2 差速行驶(两轮阻力不同)…………………………………………………34
4.3动画输出………………………………………………………………………36
5 结论………………………………………………………………………………36
参考文献 ………………………………………………………………………37
致谢……………………………………………………
关键词：差速器；虚拟样机；动力学分析
Abstract:The prototype of the simulation topic is an agricultural mechanical transmission with differential, and particularly relates to a sliding gear differential. After familiar with the operation’s principle of the rear differential,base on the UG operating platform, research the general method for modeling,proposed the method of virtual assembly when the mechanism drives.Importing geometric data model into ADAMS by using the UG and ADAMS data exchange interface,then build differential system dynamics model.Through the left and right wheels of drag analysis of the situation，through the two conditions that straight running and cornering driving conditions are simulated, verified the differential transmission system model and the modeling process is reasonable.However, for complex mechanical systems, in order to accurately control the movement, rely solely on ADAMS software is difficult to do. In order to improve the reliability of the simulation results, on the basis of UG existing modeling,then sliding teeth do differential model is imported to ADAMS / View from the UG software , and adds a corresponding constraint on each of the connecting points, then simulate after repeated correction parameter.Get the left and right wheel accelerated velocity curve、velocity curve of the differential then draw speed difference curve.The analysis results show that, in the given conditions,the differential basically meet the design requirements.
Key words: Differentials;Virtual prototyping; Kinetic analysis
目 录
摘要……………………………………………………………………………1
关键词…………………………………………………………………………1
1前言………………………………………………………………………………2
1.1研究背景……………………………………………………………………2
1.2机械系统动力学分析与仿真及数字化功能样机……………………………3
1.2.1机械系统动力学分析与仿真…………………………………………………3
1.2.2数字化功能样机………………………………………………………………4
1.2.3数字化功能样机软件系统……………………………………………………7
1.2.4研究现状和发展趋势 ………………………………………………………8
1.3本文要研究的主要内容…………………………………………………………9
2 ADAMS动力学建模与求解………………………………………………………10
2.1 ADAMS采用的建模方法………………………………………………………10
2.2 ADAMS的方程求解方案………………………………………………………13
2.3 ADAMS采用的碰撞模型……………………………… ………………………16
3 数据建模…………………………………………………………………………17
3.1主要系统功能分析……………………………………………………………17
3.2 ADAMS建模……………………………………………………………………20
3.2.1 UG建模（以中心齿轮为例）………………………………………………20
3.2.2 模型导入ADAMS…………………………………………………………22
4 ADAMS运动分析仿真……………………………………………………………24
4.1基本工作………………………………………………………………………24
4.1.1 绘制地板……………………………………………………………………24
4.1.2 添加运动幅…………………………………………………………………26
4.1.3 添加驱动力力矩……………………………………………………………28
4.2两种情况分析定义……………………………………………………………29
4.2.1 等速行驶(两轮阻力相同)…………………………………………………30
4.2.2 差速行驶(两轮阻力不同)…………………………………………………34
4.3动画输出………………………………………………………………………36
5 结论………………………………………………………………………………36
参考文献 ………………………………………………………………………37
致谢……………………………………………………
