摘 要
随着科技的发展，计算机辅助设计技术越来越广泛的应用在各个设计领域。现在，它已经突破了二维图纸电子化的框架，转向以三维实体建模、动力学模拟仿真和有限元分析为主线的机械系统动态仿真技术。其研究范围主要是机械系统运动学和动力学分析，核心是利用计算机辅助技术进行机械系统的运动学和动力学分析，以确定系统及其各构件在任意时刻的位置、速度和加速度，同时，通过求解代数方程组确定引起系统各构件运动所需的作用力和反作用力。动态仿真技术一出现，就受到人们的普遍关注和重视，并且出现了许多基于动态方=仿真技术的商业软件，较有影响的有美国参数技术公司的PTC。
以Pro/MECHANICA为分析平台，运用有限元分析方法，对直齿轮、斜齿轮实际受力情况、边界条件和施加载荷进行研究。运动分析模块可以进行机构的干涉分析，跟踪零件的运动轨迹，分析机构中零件的速度、加速度、作用力、反作用力和力矩等。运动分析模块的分析结果可以指导修改零件的结构设计(加长或者缩短构件的力臂长度、修改凸轮型线、调整齿轮齿数比和中心距等)或者调整零件的材料(减轻或者加重或者增加硬度等)。设计的更改可以直接反映在装配主模型的复制品分析方案(Scenario)中，再重新分析，一旦确定优化的设计方案，设计更改就可直接反映到装配主模型中。将Pro/E三维实体造型与Pro/MECHANICA机构运动分析相结合，完成对连杆和凸轮机构的机构运动分析，及运动仿真。加强对连杆和凸轮机构的认识与理解。
关键词: 直齿轮、斜齿轮; Pro/E 、Pro/MECHANICA; 运动仿真、有限元
1
Abstract
With the development of technology, computer-aided design technology becomes more widely used in various design.Now, it has broken through the framework of two-dimensional drawings、 electronic、shift tothree-dimensional solid modeling, dynamic simulation and finite element analysis of the main line of the mechanical system dynamic simulation techniques.The major areas of its study kinematics and dynamics of mechanical systems, the core technology is the use of computer-aided kinematics and dynamics of mechanical systems analysis to determine the system and its components at any time of the position, velocity and acceleration at the same time,by solving algebraic equations determine the cause of the required system component moving action and reaction.Dynamic simulation appeared to be widespread concern and attention, and there were many parties = simulation based on dynamic business software, more influential technology companies of U.S. parameters PTC. To Pro / MECHANICA platform for analysis using the finite element method, on the spur gear, helical gear by the force of the actual situation, boundary conditions and applied load were studied.Motion analysis module analyzes institutional interference, tracking the trajectory of parts, parts of bodies in the speed, acceleration, force, reaction force and torque and so on.Motion analysis results of the analysis module to modify parts of the structure could guide design (longer or shorter moment arm length of the component, modify the cam, adjust the gear ratio and center distance, etc.) or adjust the parts of the material (to reduce or add to or increase the hardnessetc.).Design changes can be directly reflected in the assembly of copies of the master model program (Scenario), the re-analysis, Once optimized design, design changes can be directly reflected in the assembly of the main model.The Pro / E three-dimensional solid modeling and Pro / MECHANICA combined kinematic analysis, complete linkage and cam mechanism of the body motion analysis and
2
motion simulation.Connecting rod and cam mechanism to strengthen knowledge and understanding.
Key words: spur gears, helical gears; Pro / E, Pro / MECHANICA; motion simulation, finite element
3