【作者】 柳志华；

【导师】 何天明；

【作者基本信息】 武汉理工大学 ， 车辆工程， 2007， 硕士

【摘要】 随着全球市场和全球制造的形成，我国摩托车工业自主创新开发能力差、技术水平低下的现状正面临强有力的竞争和严峻挑战。面对世界经济全球化的大趋势和入世后新的市场环境，要想实现摩托车技术的可持续发展，就必须把握摩托车技术发展动向，不断开发新的产品，提高产品的档次，以满足市场多样化的需求。应用虚拟样机技术开发摩托车产品是借鉴、消化、吸收国外先进制造技术，增强我国摩托车企业自主开发和技术创新能力的有效途径。虚拟样机技术是从分析产品整体性能出发，解决传统的设计与制造过程弊端的高新技术。使用系统仿真软件可以建立虚拟样机模型，在各种虚拟环境中真实地模拟系统的运动，并对其在各种工况下的运动和受力情况进行仿真分析，观察并试验各组成部件的相互运动情况和产品整体的运动及受力情况，快速分析多种设计方案，直到获得系统的最优设计方案。虚拟样机技术的运用，不但可以缩短开发周期，而且设计质量和效率也得到了有效的提高。本文基于三维建模软件UG建立了摩托车整车虚拟样机的数字化模型，阐述了摩托车虚拟样机开发的流程及其关键技术。探讨了在UG和ADAMS软件中，如何利用参数化的设计方法建立模型。基于多体、动力学理论，结合应用ADAMS软件，针对摩托车的振动特性，分别建立了基于刚性车架和柔性车架的摩托车多体动力学模型。结合功率谱密度函数以及随机路面理论的相关知识，通过计算机模拟出车速在60Km／h的B级路面位移功率谱密度曲线，以此作为仿真输入。最后利用两种摩托车虚拟样机模型分别进行振动分析，分析结果表明在研究摩托车整车固有特性以及摩托车行驶状态的振动情况时，多刚体样机的仿真结果和多柔体样机的仿真结果区别不大，用多刚体模型可以代替复杂的多柔体模型，以此来简化建模与计算过程。最后以多刚体模型为例，讨论了摩托车的各项相关参数对振动特性的影响。通过论文结果的分析，认为采用多刚体动力学样机进行仿真实验是现阶段在摩托车企业切实可行的设计方法。更多还原

【Abstract】 With the globalization of the market and the manufacture, the motorcycleindustry of our country has been confronted with strong competitions and rigorouschallenges on account of the insufficient competence of the independence innovationand development and the low-level technology. In the face of the general current ofthe economic globalization and the new market environment after affiliating the WTO,it is necessary to grasp the development trend of the motorcycle technology, continueto develop new products and improve the product quality to satisfy the diversifiedneeds of the market. The application of virtual prototype technology to develop theproducts of motorcycle is an effective way to increase the abilities of technologyinnovation and development on our own technology through using the experience forreference, assimilating and absorbing the foreign advanced manufacture technology.Virtual Prototype technology is used to analyze the overall performance ofproducts, it’s a new technology used to resolve the defects of traditional design andmanufacture process. In this technology, the engineers may directly use the softwareto obtain the virtual Prototype model on the computer. The system movement can bereally simulated in hypothesized environment used by system simulation software,and then the users carry on the simulation analysis to it under each kind of movementand the stress situation, observe and test the mutual movement situation and the stresssituation of component, analyze various kinds of design proposal quickly, carry on theexperiment which is difficult or unable to be carried on to the physical prototype,until obtain the most superior design proposal. The application of Virtual Prototypetechnology is not only reduces the development time, but also enhances the designquality and efficiency.This paper is based on three-dimensional modeling software to establish thedigital model of motor virtual Prototype, and expound on the design workflow andthe key technology of Motorcycle Virtual Prototype. How to establish model usingthe parameterization design method by UG and ADAMS. Relying on Multi_bodyDynamics theory, applying ADAMS software, in view of motorcycle’s vibration characteristic, established the road spectrum of motorcycle’s Virtual Prototype oncomputer. Analyze the characteristics of vibration of motorcycle, discuss the infectionof some parameters related to vibration, and put forward the advice of improvement.This paper builded up the virtual-motor-prototype via different methods andcompared the results of those different models. When virtual prototype built forharshness and normal eigenmodes experiment, there is no obvious different amountthose prototypes. Therefore, it’s likely to make use of the rigid model instead of theflex model for predigesting modeling and calculation. The result of this paperindicated that multi-rigid-body virtual prototype is a reasonable design method forcurrent Chinese motor factory.更多还原