【作者】 王鹏；

【导师】 郑辉； 张培堂；

【作者基本信息】 上海交通大学 ， 机械工程（专业学位）， 2015， 硕士

【摘要】 双钢轮振动压路机在振动压实工作进行时,为达到压实效果良好,要求振动轮的激振较强;而为保证压路机司机的身体健康和零部件的使用寿命,又要求压路机驾驶室与上车的振动越小越好。因而,为在保证高工作效率同时兼顾司机健康与机器寿命,应当寻求合适的压路机振动系统与驾驶室振动控制解决方案,以降低振动轮激励源向上车及驾驶室的振动传递。本文基于双钢轮振动压路机上车与驾驶室减振的实际工程需要,主要进行的工作和取得的成果如下:1压路机系统动力学建模与分析。通过压路机系统的动力学理论建模,使用Matlab建立了驾驶室振动传递率与减振器刚度及阻尼之间的隐式数学关系。进一步的,通过驾驶室减振器变参数计算,分析了驾驶室减振器刚度和阻尼对上车架向驾驶室振动传递率的影响趋势,为减振器参数优化提供理论依据。2驾驶室减振器参数优化。将上车架向驾驶室的振动传递率最低作为优化的目标函数,已知驾驶室减振器之外的其他减振器刚度和阻尼参数为约束条件,使用Isight与Matlab联合优化驾驶室减振器的刚度和阻尼系数。通过优化计算与分析,得出了更优的减振器参数。优化结果表明:为使振动传递率最低,减振器刚度应尽量小,前减振器阻尼尽量小,而后减振器阻尼尽量大。3新型摩擦阻尼橡胶减振器开发。根据参数优化后得出的减振器参数,结合压路机驾驶室实际工况与安装要求,开发设计新型摩擦阻尼橡胶减振器,并测试其性能参数。4用Harmony软件对压路机振动系统进行动力学仿真分析。运用公司自主开发的动力学分析软件Harmony,对压路机驾驶室使用原有减振器与新型减振器的减振效果进行了仿真分析,结果表明:使用优化后的减振器,仿真得出的振动传递率符合优化目标要求,且冲击响应表现更好。5双钢轮压路机系统振动测试与分析。运用LMS专业振动测试设备和软件,对压路机振动系统进行实车振动测试与分析,验证并评价优化后减振系统的减振效果。更多还原

【Abstract】 When a double-drum roller is working, the excitations of vibrating drums are expected to be large enough to achieve a good compaction effect. Meanwhile, the vibrations of the upper frame and cabin is expected to be small enough to ensure fatigue lives of components and the driver’s health. In order to balance the two aspects, an appropriate isolation is necessary to reduce the transmission rate of vibration from excitation sources to the upper frame and cabin.Based on the practical engineering requirement of vibration control for upper frame and cabin, the research contents and results of this thesis are as following:1. Dynamic modeling and analysis of the roller vibration system. Through theoretical modeling and analysis of the roller vibration system, the dynamic equations of the system are established, based on which the relationship between isolator parameters and the cab’s vibration is founded. And through variable parameter calculations, the influence tendency of cabin isolators’ stiffness and damping to the vibration transmissibility from frame to cabin is analyzed, which is the theoretical basis of isolator parameter optimization.2. Optimization of cabin isolator parameters. Using the minimum of vibration transmissibility from upper frame to cabin as the optimization objective function, the known parameters as constraint conditions, and taking the stiffness and damping of the isolators as design variables, a better parameter combination of the isolators is founded after calculation and analysis. The conclusion of optimization is that the stiffness need to be as low as possible, the damping of front isolator needs to be as low as possible and the damping of front isolator needs to be as high as possible, so that the transmissibility will be lowest.3. Design and development of a new friction damping rubber isolator. According to the obtained optimized parameters of isolator, and combined with the roller cabin’s actual working condition and installation requirements, a new friction damping rubber isolator is designed and developed.4. The dynamic simulation, in which the performances of the old and the new isolator are compared, is done on the roller vibration system using Harmony software, which is developed by Lord company. The simulation shows that the transmissibility is acceptable with the optimized parameters, and the shock response is obviously improved.5. Double roller system vibration test and analysis. A real vehicle vibration test and analysis on roller vibration system is done using professional vibration test equipment made by LMS company in order to verify the effect of the optimized vibration reduction system.更多还原