Design method for damping coefficient of end longitudinal shock absorbers of high-speed railway vehicle body

Abstract

The invention relates to a design method for the damping coefficient of end longitudinal shock absorbers of a high-speed railway vehicle body, and belongs to the technical field of high-speed railway vehicle suspension. Through establishing a six-freedom-degree vertical vibration optimal design simulation model of a whole railway vehicle, with railway vertical irregularity being input excitation and the minimum root-mean-square value of vibration acceleration of vehicle body bounce movement being a design target, the optimal damping coefficient of the end longitudinal shock absorbers of the vehicle body is obtained through optimal design. Through a design example and SIMPACK simulation verification, the accurate and reliable damping coefficient value of the end longitudinal shock absorbers of the vehicle body can be obtained through the method, and the reliable design method is provided for the design of the damping coefficient of the end longitudinal shock absorbers of the high-speed railway vehicle body. By the utilization of the method, the design level of a high-speed railway vehicle suspension system can be increased, and the driving safety and stability of the vehicle are improved; meanwhile, the product design and test costs can be lowered, so that the international market competitiveness of the railway vehicle in China is enhanced.

Description

technical field [0001] The invention relates to a high-speed rail vehicle mount, in particular to a design method for the damping coefficient of a longitudinal shock absorber at the end of a high-speed rail vehicle body. Background technique [0002] The longitudinal shock absorber at the end of the car body is installed between two adjacent car ends of an articulated or bogie-type high-speed rail vehicle, which can effectively attenuate the longitudinal vibration of the car body and significantly increase the integrity and stability of the vehicle. However, according to the information obtained, it is very difficult to analyze and calculate the dynamics of the rail vehicle because it belongs to a multi-degree-of-freedom vibration system. Most of the theoretical design methods of the system rely on computer technology and use multi-body dynamics simulation software SIMPACK or ADAMS / Rail to optimize and determine its size through solid modeling. Although this method can obtai...

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Problems solved by technology

However, according to the information obtained, it is very difficult to analyze and calculate the dynamics of the rail vehicle because it belongs to a multi-degree-of-freedom vibration system. Most of the theoretical design methods of the system rely on computer technology and use multi-body dynamics simulation software SIMPACK or ADAMS / Rail to optimize and determine its size through solid modeling. Although this method can obtain relatively reliable simulation values, the vehicle has Better dynamic performance, however, with the continuous increase of the speed of rail vehicles, people have put forward higher requirements for the design of the damping coefficient of the longitudinal shock absorber at the end of the car body. At present, the damping coefficient of the longitudinal shock absorber at the end of the car body The design method cannot give a guiding innovation theory, and cannot meet the development of shock absorber design requirements under the condition of continuous speed increase of rail vehicles

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