【作者】 喻萌；

【导师】 龙小乐； 鲍务均；

【作者基本信息】 武汉大学 ， 机械设计及理论， 2005， 硕士

【摘要】 本文简要地介绍了论文的课题来源以及管片拼装机的发展及现状,并对虚拟样机技术的发展做了扼要的论述。 以多刚体系统动力学为理论基础,应用三维参数化软件CATIA建立了四自由度管片拼装机模型,通过ADAMS软件的接口,将虚拟样机输入其中。对管片拼装机的动力学特性进行仿真,分析其各个运动的轨迹和速度以及一些部件的受力和力矩,并对仿真结果进行评价,探索了运用ADAMS软件对类似大型工程机械进行动力学仿真的方法。 在大型有限元分析软件ANSYS中新建立一个简化的管片拼装机模型,对机体进行了实际约束条件下的模态分析,系统地分析了机体的各阶模态,从而确定了结构的自振频率和相应振型,分析出机构中的薄弱部件,为机械结构设计提供了进一步的依据。 在前面结论的基础上,对管片拼装机关键受力部位和主要构件进行结构强度分析,主要有以下两项内容:(1)啮合齿轮的接触应力分析。(2)大伸缩臂静态刚度强度的有限元分析。最后根据分析的结果对一些机构进行了适当的改进和优化。更多还原

【Abstract】 This paper has introduced the development of the TBM and the lining segments installation machine and current situation briefly, and has done the argumentation briefly to the development of virtual prototyping.The theory and method of multi-rigid-body system dynamics is used to build the model of the lining segments installation machine with three-dimensional parameter software CATIA, then through the interface between CATIA and ADAMS software, input the lining segments installation machine prototype into ADAMS. By studying the multi-rigid-body dynamics of the machine, the dynamics characteristic of it is simulated, and the simulating result is qualitatively analyzed and evaluated, and the modeling and simulating method for large-scale project machine with ADAMS software is also probed into.With the famous FEM software ANSYS, the predigesting finite element model of the lining segments installation machine was built according to its character and work conditions, and the vibration characteristics (natural frequencies and mode shapes) of the structure was determined applying model analysis.lt also can be a starting point for another, more detailed, dynamic analysis, such as a transient dynamic analysis, a harmonic response analysis, or a spectrum analysis.Some parts of the lining segments installation machine is not only the crucial force-subsisting site, but also a major material-consuming part. According to the principal that both security and efficiency are necessary, structure analysis was applied to the on the basis of above results. (1) The contact analysis about joggling gears. (2) The static analysis about the big flexing arms. Lastly, depending the result of the structure analysis, the structure amelioration and optimization were applied to the lining segments installation machine.更多还原