Collaborative optimization method for damping ratio of high-speed rail seat and primary and secondary vertical suspensions

Abstract

The invention relates to a method for synergistically optimizing the damping ratio of a high-speed rail seat and a vertical suspension of the first series and the second series, and belongs to the technical field of high-speed rail vehicle suspension. The present invention constructs the vertical vibration collaborative optimization simulation model of the seat and the primary and secondary vertical suspension systems, takes the random input of track height irregularity as the input excitation, and takes the minimum root mean square value of the vertical vibration acceleration of the seat as The design goal is to optimize the design to obtain the optimal damping ratio of the high-speed rail seat mount and the primary and secondary vertical mounts. Through the design example and SIMPACK simulation verification, it can be known that this method can obtain the optimal damping ratio of the high-speed rail seat suspension and the primary and secondary vertical suspension systems accurately and reliably. The design of the suspension damping ratio provides a reliable design method. Using this method can not only improve the design level of the high-speed rail suspension system and the ride comfort of the vehicle, but also shorten the product design cycle 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 a method for synergistically optimizing the damping ratio of a high-speed rail seat and the vertical mounts of the first series and the second series. Background technique [0002] The damping ratio of the seat and the vertical suspension system of the first series and the second series has an important influence on the ride comfort of the high-speed rail. An important parameter on which the valve system parameters of the vertical shock absorber are based. However, according to the available information, since the high-speed rail is a multi-degree-of-freedom vibration system, it is very difficult to perform dynamic analysis and calculation on it. The theoretical design method of the system is not given, and most of the seat suspension, primary vertical suspension and secondary vertical suspension are studied separately, and with the help of computer technology, the multi-body d...

AI Technical Summary

Problems solved by technology

However, according to the available information, since the high-speed rail is a multi-degree-of-freedom vibration system, it is very difficult to perform dynamic analysis and calculation on it. The theoretical design method of the system is not given, and most of the seat suspension, primary vertical suspension and secondary vertical suspension are studied separately, and with the help of computer technology, the multi-body dynamics simulation software SIMPACK or ADAMS / Rail respectively optimize and determine its size through solid modeling. Although this method can obtain relatively reliable simulation values ​​and make the vehicle have better dynamic performance, however, due to the Mounting is a complex system coupled with each other. At present, it is difficult to achieve the best matching of the damping ratio of the high-speed rail seat and the vertical suspension system of the first series and the second series by modeling and designing the damping ratio of the suspension separately. , and with the continuous increase of the speed of high-speed rail, people have put forward higher requirements for the design of the damping ratio of the seat and the first and second vertical suspensions. At present, the high-speed rail seats and the first and second vertical suspensions The method of damping ratio design cannot provide 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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