Optimal Design Method for Optimum Damping Ratio of Seat Mounts for High Speed ​​Rail Vehicles

Abstract

The invention relates to an optimal design method for the optimal damping ratio of a high-speed rail vehicle seat mount, and belongs to the technical field of high-speed rail vehicle mounts. The present invention establishes the vertical vibration differential equation of the seat suspension system, utilizes MATLAB / Simulink simulation software, builds the vertical vibration optimization design simulation model of the seat suspension system, and takes the track height irregular random input as input excitation , with the minimum root mean square value of the vibration acceleration of the vertical motion of the seat as the design goal, the optimum damping ratio of the seat suspension system is obtained through optimization design. Through the design example and SIMPACK simulation verification, it can be seen that the method can obtain the accurate and reliable optimal damping ratio of the seat suspension system, and provides a reliable design method for the design of the damping ratio of the seat suspension of high-speed rail vehicles. Using this method can not only improve the design level of the suspension system of high-speed rail vehicles, but also improve the ride comfort of the vehicles; at the same time, it can also reduce product design and test costs, and enhance the international market competitiveness of my country's rail vehicles.

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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