Railway vehicle second level vertical suspension applying inerter and parameter determining method thereof

Abstract

The invention provides a railway vehicle second level vertical suspension applying an inerter and a parameter determining method thereof. The railway vehicle second level vertical suspension comprises the inerter, a damper, a main spring and an auxiliary spring, and the main spring is in parallel connection with the damper and then is in parallel connection with a series connection structure of the inerter. According to the suspension parameter determining method, the minimum of a Sperling index is used as an optimization object, under the premise that the root-mean-square value of the dynamic deflection of the second level vertical suspension is not beyond one third of a limiting stroke, the parameter is obtained by optimization through a particle swarm optimization algorithm. A simulation analysis result shows that the railway vehicle second level vertical suspension and the parameter determining method thereof, the Sperling index of railway vehicles can be effectively lowered in the riding process, and the riding stability of the railway vehicles can be improved.

Description

technical field [0001] The invention belongs to the field of vehicles, in particular to a secondary vertical suspension of a rail vehicle using an inerter and a parameter determination method thereof. Background technique [0002] As an important part of the chassis system, the performance of the suspension directly affects the working quality of the rail vehicle at high speed. Therefore, improving the performance of the suspension system is of great significance to the ongoing train speed increase in our country. Once the parameters of the traditional passive suspension are determined, they cannot be adjusted, so its performance cannot meet the higher requirements for the smoothness of rail vehicles. Although the active / semi-active suspension developed rapidly in recent years can effectively improve the suspension performance, the problems of high cost, high energy consumption and control time lag limit its further promotion and application. [0003] An inerter is a mechan...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a rail vehicle using an inerter with low structural complexity and good vibration isolation performance in order to solve the problem that the performance improvement and structural complexity of the current rail vehicle suspension containing the inerter are contradictory Secondary vertical suspension, and its parameter determination method is given, so as to achieve the maximum improvement of suspension performance

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