Research On The Geardraft Of Heavy-Duty Freight By Simulation Method

It is major trend to develop heavy load in the railway transport. The wagon buffers to be one of the important fittings in the railway wagons, it's play a major role in overload transportation with safety and high efficiency motion. , the buffer's major function is absorb and consume the energy of impact in the organize/break up the groups or star/brake the wagon, bring down the longitudinal force, to reach purpose of protect the vehicle and the goods.At the present time, the major of buffers are MT-2 and HM-1 in our railway. But, along with the development of heavy haulages, the continual changes of heavy-duty train's marshal group and the sharply increases of wagon's length and load, it's request more and more higher in buffer's functions. So, it's take a great importance in intense and system study in buffer's structure, to improve the functions of existing buffers, improve the buffer's technology in design, manufacture, application and maintain.First the article analyze the develop introduction and the research situation and the methods of buffers at home and aboard, to point out the meaning of study railway vehicle dynamics and the domestic current status of research on virtual prototyping technology, and the benefits of virtual prototyping technology is expounded. Then a drop-hammer and impact dynamic simulation modules have been developed based on Adams/View. Then make use of the actual test dates to inspect and verify the validity of numeral model.Through the buffer's numerical experiment, to analyze the effects of major structure and material's parameters, which are spring's stiffness, initial pressure, skewback's angles, friction coefficient of the friction components of the buffer's impedance characteristic. and research the relationships of the buffer structure and the key parameter.The method of built buffer's digital model and numerical experiment was the first time in our country. Through the buffer's numerical experiment, we got large of data and conclusion that can improve buffer's function, to provide theory basis and technical reference for development and design of the buffers and intensive study of railway vehicle dynamics.