【作者】 高云鹤；

【导师】 张卫华；

【作者基本信息】 西南交通大学 ， 载运工具运用工程， 2010， 硕士

【摘要】 铁路运输自19世纪初正式运营以来,一直以其运量大、速度快、安全、节能环保等优势作为人类最重要的交通运输方式,在世界各国的经济发展中发挥着重要的作用。目前,我国大量新建高速铁路,大力推进客运高速化,为货运快捷化创造条件的同时,也对货运列车的速度提出了更高的要求,以减少客货列车的速度差,充分利用高速线路的运输能力；另一方面为提供集装箱、汽车、行包快运、鲜活物品等高附加值货物快运服务,因而货运安全快捷化势在必行。本文基于此背景,开展快速货车动力学性能分析和参数优化研究。在分析快速货车转向架和平车车体结构的基础上,简要阐述了车辆系统动力学建模和刚柔耦合多体系统理论基础；运用计算机辅助设计软件Pro/Engineer和有限元分析软件ANSYS,建立平车车体有限元模型,并进行模态分析和子结构分析；其次结合多体动力学软件SIMPACK,分别建立了车辆系统的多刚体和刚柔耦合的动力学仿真模型。基于多刚体和刚柔耦合的动力学仿真模型,对车辆系统的动力学性能进行分析,讨论参数影响规律,优化转向架和车体参数。同时,对比分析多刚体和刚柔耦合动力学模型的仿真计算结果,探讨车体弹性变形对车辆动力学性能的影响程度。结果表明：优化选取的转向架悬挂参数和车体参数均能满足其动力学性能的要求,为研制快速货车转向架提供理论参考；考虑车体弹性,即车体的结构自振,对空车车辆系统横向和垂向振动响应有一定的影响,对重车车辆系统垂向振动响应有很大程度的影响;考虑车体弹性降低了临界速度,降幅不大,重车降幅略大于空车；对运行平稳性和动态曲线通过性能有不同程度的影响,对重车的影响大于空车。更多还原

【Abstract】 Since its formal operation in the early 19th century, the railway transportation has always been the most important transportation mode and plays a quite important role in economic development across the globe based on its advantages, such as large traffic volume, rapid speed, great safety, energy-saving superiority and environmental protection. Currently, Chinese government has newly built a great number of high-speed railways, promoted high-speed passenger transport and created the conditions for the freight transport as well. In addition, higher demands has been put on the speed of freight train so as to reduce the velocity contrast of both passenger and freight trains and make full use of transportation capacity of high-speed railway; on the other hand, in order to provide high added-value freight transport service, such as container, cars, parcel transportation and livestock perishable, promoting safety and velocity for freight transport is imperative. Under the above-mentioned background, Dynamic Performance Analysis and Parameter Optimization of Rapid-speed Wagon was researched.Based on the analysis of the structure of rapid speed freight bogie and flat car, the modeling theory of Vehicle System Dynamics and Rigid-Flexible coupling multibody system were briefly explained. The finite element model of flat car body was established by applying Pro/Engineer, ANSYS softwares,as the same time, the modal analysis and Substructure analysis were carried out. Secondly, a multi-body and Rigid-Flexible coupling dynamic simulation model is established by SIMPACK software.Based on the multi-body and Rigid-Flexible coupling dynamic simulation model, the dynamic performance of vehicle system was analysed., the rules of parameters influence were discussed and the parameters of the bogie and car body were optimized.In addition, the calculation results of the Multi-body and Rigid-Flexible coupling dynamic simulation model were compared.The influence of car body elastic deformation on vehicle dynamic performance was discussed. The analysed result shows that the bogie suspension parameter and car body parameter upon optimized could all meet the dynamic performance and provide theoretical support for developing the rapid freight bogie; Considering the elastic body, as the structure of the body vibration, had certain influence on the horizontal and vertical vibration response of the empty car system and large influence on the Vertical response of the loaded car system;The body elastic had reduced the critical speed with slight drop, and the loaded car decreased larger than the empty car; running stability and dynamic curve negotiation were under influence of different degree, but much greater on loaded car than on empty car.更多还原