曲柄滑块机构工作特性研究及其在下肢关节康复器中的应用

机械设计制造及其自动化论文，论文编号:JX1198  论文字数:15873.页数:46

摘   要
 计算机仿真技术作为当今世界的前沿科学之一,得到广泛深入的发展和广泛的应用。现代制造技术中的仿真技术扩展了传统的仿真技术,已应用到产品的设计、生产、测试、维护等整个产品的生命周期中。参数化方法是产品模型修改和变型设计的需要，实现参数化设计系统的核心问题是构造设计对象的参数化模型和建立参数驱动机制。Pro/E是集CAD/CAM/CAE于一体的大型设计软件。使用PRO/E，不仅可以进行零件建模、装配建模，还可以进行运动仿真，有限元分析等。
 CPM(continuous passive motion)是一种新的生物学概念，在医学上利用其原理设计出了多种医疗器具。本次毕业设计以CPM下肢关节康复器为应用实例，深入研究了曲柄滑块机构工作特性。首先利用Pro/E软件对曲柄滑块机构进行三维建模，然后运用其运动仿真模块动态模拟了曲柄滑块机构的运动过程，并产生动态学曲线，接着进行有限元模块对机构的各部分进行受力分析。通过仿真，给出康复器“优化”的结构设计参数，按照人的下肢重量给杆件施加载荷，进行动力学分析，计算滑块在不同位置时所需要的驱动力，最后调节各杆件截面形状，进行有限元分析，多方案比较，选择适合的形状和尺寸为符合要求的型材提供支撑。
 本次研究的结果对今后下肢关节康复器的设计实践有一定的指导作用，可以用其作为今后研究的方向。
关键词：曲柄滑块 运动仿真 有限元分析 三维建模 下肢康复器

Abstract
  Computer simulation technology in today''''s world as one of the leading edge of science, has been extensive and in-depth development and a wide range of applications. Modern Manufacturing Technology in the expansion of the traditional simulation technology of simulation technology has been applied to product design, production, testing, maintenance of the entire product life cycle. Parametric product model is modified and variant design needs, the realization of parametric design system is the core issue in structural design of the object model parameters and to establish the parameters of the driving mechanism. Pro / E is a CAD / CAM / CAE in the large-scale integrated design software. The use of Pro / E, not only to parts modeling, assembly modeling, motion simulation can also be used for finite element analysis and so on.
  CPM (continuous passive motion) is a new biological concept in the medical use of its design principle a variety of medical devices. Graduated from the joint design of rehabilitation of lower limb CPM device as an example, in-depth study of the characteristics of slider-crank mechanism. First of all, the use of Pro / E software for the slider-crank mechanism to carry out three-dimensional modeling, and then use its dynamic motion simulation module to simulate the movement of slider-crank mechanism process and dynamics have a curve, then the finite element module of the various parts of the body to carry out mechanical analysis. Through the simulation, given the rehabilitation device "optimize" the structure of the design parameters, in accordance with the person''''s lower extremities to the bar imposed by the weight load, dynamic analysis, calculation of the slider at different positions of the driving force required for the final adjustment of the bar cross-section the shape of the finite element analysis, multi-program comparison, the choice of suitable shape and size to meet the requirements for the provision of support material.
  The results of this study on the future rehabilitation of lower extremity joint design practice a certain guiding function can be used as a direction for future research.
 Keywords: Slider-crank；Motion Simulation；Finite Element Analysis；Three-dimensional modeling；Lower limb rehabilitation device

目   录
中文摘要 I
英文摘要 II
目录 III
第一章 绪论 1
1.1 课题研究的背景及意义 1
1.1.1 课题研究背景 1
1.1.2 选题意义 1
1.2 曲柄滑块机构简介 2
1.3 课题实现方法 2
1.4 本次课题研究的基本步骤 2
1.5  Pro/E软件概况 2
第二章 曲柄滑块机构三维建模及运动仿真 4
2.1 对心曲柄滑块机构三维造型图 4
2.1.1 机构零部件建模 4
2.1.2 装配 13
2.2 运动仿真 17
2.3 本章小结 20
第三章  曲柄滑块机构在关节康复器中的应用 21
3.1 下肢关节康复器简介 21
3.2 康复器技术参数及机构简图 21
3.3 康复器运动仿真分析 22
3.4 机构设计参数优化 24
3.5 动力学分析 25
3.5.1 驱动力计算 25
3.5.2 滑块位置和膝关节弯曲力矩关系 27
3.6 本章小结 27
第四章 关节康复器主要构件的有限元分析 28
4.1 有限元分析简介 28
4.1.1 有限元的基本思想 28
4.1.2 有限元方法的一般过程 29
4.1.3 计算模型中的数据 29
4.1.4 建立有限元模型的过程 29
4.2 康复器主要构件的有限元分析 30
4.2.1 下肢关节康复器大腿支架三维模型图 30
4.2.2  单元划分、材料选择、约束和外加载荷的添加 31
4.2.3 运行结果与分析 33
4.3 大腿支架结构优化 36
4.4 本章小结 37
第五章 总结与展望 38
5.1 全文总结 38
5.2 课题展望 38
参考文献 40
致   谢 42