Optimal design method for optimal damping ratio of high-speed railway vehicle seat suspension

Abstract

The invention relates to an optimal design method for the optimal damping ratio of high-speed railway vehicle seat suspension, and belongs to the technical field of high-speed railway vehicle suspension. Through establishing a vertical vibration differential equation of a seat suspension system and utilizing MATLAB / Simulink simulation software, a vertical vibration optimal design simulation model of the seat suspension system is constructed; with railway vertical irregularity random input being input excitation and the minimum root-mean-square value of vibration acceleration of seat vertical movement being a design target, the optimal damping ratio of the seat suspension system is obtained through the optimal design. Through a design example and SIMPACK simulation verification, the accurate and reliable optimal damping ratio value of the seat suspension system can be obtained through the method, and the reliable design method is provided for the design of the damping ratio of high-speed railway vehicle seat suspension. By the utilization of the method, the design level of the high-speed railway vehicle suspension system can be increased, and the driving safety and stability of a 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 an optimal design method for the optimal damping ratio of a high-speed rail vehicle seat mount. Background technique [0002] The damping ratio of the seat suspension system has an important influence on the ride comfort of high-speed rail vehicles, and its design or selection is an important parameter based on the design of the seat suspension system shock absorber valve system parameters. However, according to the available information, since the rail vehicle is a multi-degree-of-freedom vibration system, it is very difficult to analyze and calculate its dynamics. At present, no systematic theory has been given for the design of the optimal damping ratio of the seat suspension at home and abroad. Most of the design methods are based on computer technology, using multi-body dynamics simulation software SIMPACK or ADAMS / Rail, to optimize and determine its size through solid mode...

AI Technical Summary

Problems solved by technology

However, according to the available information, since the rail vehicle is a multi-degree-of-freedom vibration system, it is very difficult to analyze and calculate its dynamics. At present, no systematic theory has been given for the design of the optimal damping ratio of the seat suspension at home and abroad. Most of the design methods are based on computer technology, using multi-body dynamics simulation software SIMPACK or ADAMS / Rail, to optimize and determine its size through solid modeling, although this method can get more reliable simulation values, so that the vehicle has better Dynamic performance, however, with the continuous increase of the speed of rail vehicles, people put forward higher requirements for the design of the seat suspension damping ratio, the current method of seat suspension damping ratio design can not give a guiding innovation Theory cannot meet the development of shock absorber design requirements under the condition of continuous speed increase of rail vehicles

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