【作者】 韩守习；

【导师】 王炳乐；

【作者基本信息】 重庆大学 ， 机械设计及理论， 2005， 硕士

【摘要】 随着国民经济飞速发展、公路网全面建设以及生活水平极大提高,摩托车逐渐融入到人们工作生活之中。人们对摩托车的行驶平顺性和安全性提出更高的要求。因此,摩托车的行使平顺性一直是该行业的研究人员不停探索研究的重要方向之一。本文主要针对250一款摩托车的行使平顺性特征进行研究,通过分析找出影响性能的主要因素,从而达到改善行使平顺性的目的。主要进行了以下几个方面的研究: (1) 研究和借鉴了汽车及其他车辆的平顺性分析评价方法,提出摩托行驶车平顺性评价方法; (2) 利用路面谱的数学模型,用计算机模拟生成了车辆在行驶60 km/h 时,B 级路面的路面输入不平度,并验证了此方法的正确性; (3) 研究摩托车的结构,分别建立了二自由度局部振动模型和五自由度整车行驶平顺性模型;并针对二自由度模型对摩托车后半车身部分进行定性分析; (4) 在随机和阶跃输入下,利用摩托车整车行驶平顺性模型对摩托车进行系统分析,讨论了摩托车结构动力学参数对其平顺性的影响;利用分析结果,对摩托车行驶平顺性进行评价,提出了改进方案和措施。 最后总结了全文的研究工作,介绍了论文的特色与创新之处,指出了近期有待深入研究的问题。更多还原

【Abstract】 With the rapid development of national economy, the national road network and the people’s living standard have been greatly improved. Thus motorcycles have gradually come into people’s life and work. Meanwhile, more strict standards on the comfort and security of motorcycles are put forward. The ride comfort of motorcycle is always the one of the important properties explored and studied by the researchers and makers of motorcycle. In this paper, the features of a 250 cc motorcycle on its ride comfort have been explored thoroughly and the key factors influencing the comfortableness have been found out. The goal of improving motorcycle comfortableness so is achieved. The main contributions of the research are as the following: (1)A assessment method of motorcycle comfortableness was proposed which references to the method of automobile and other vehicles assessment; (2)A mathematic model of road surface’s characteristic was studied, and the ISO B class road at a speed of 60 km/h is simulated with computer and the measurement of this method is given out; (3)A 2. degrees-of-freedom (DOF) vibration model on motorcycle part and a 5. DOF ride comfort model on motorcycle were modeled with contra posing machinery。The qualitative analysis on the 2.DOF back part vibration model was carried out; (4)The 5. DOF ride comfortableness model of motorcycle excited by inputs of random and step excitations were analyzed, and the discussion on the impact of motorcycle structure parameter to the result of calculation is carried out; The vibration comfortableness of the motorcycle is assessed with the worked out acceleration power spectrum density. Several methods to improve the vibration characteristic have been proposed by analyzing the parameter impact on the result of calculation of the structure. Finally, the studies of the research are concluded that the characteristics and the innovation of the work is introduced, the further work in the recent is pointed out.更多还原