Design method for optimal damping coefficient of secondary transverse shock absorber of low-speed rail vehicle

Abstract

The invention relates to a design method for the optimal damping coefficient of a secondary transverse shock absorber of a low-speed rail vehicle and belongs to the technical field of low-speed rail vehicle suspensions of low-speed rail vehicles. A vehicle 17-degree-of-freedom running transverse oscillatory differential equation of the low-speed rail vehicle is established, MATLAB / Simulink simulation software is used for constructing a 17-degree-of-freedom running transverse oscillatory optimization design simulation model, unevenness in the rail direction and unevenness in the horizontal direction serve as the input stimulus, the minimum oscillatory weighing acceleration root mean square value of transverse movement of a vehicle body serves as the design target, and therefore the optimal damping coefficient of the secondary transverse shock absorber of the low-speed rail vehicle is obtained through optimization design. It can be known through a design example and SIMPACK simulation verification that the accurate and reliable optimal damping coefficient value of the secondary transverse shock absorber can be obtained, and the reliable design method is provided for design of the optimal damping coefficient of the secondary transverse shock absorber of the low-speed rail vehicle. By means of the method, the design level of a suspension system of the low-speed rail vehicle can be obviously improved, and the running safety and stability of the vehicle are improved.

Description

technical field [0001] The invention relates to a low-speed rail vehicle mount, in particular to a design method for an optimal damping coefficient of a secondary transverse shock absorber of a low-speed rail vehicle. Background technique [0002] Secondary transverse shock absorbers have an important impact on the ride comfort and safety of low-speed rail vehicles. However, according to the available information, it is very difficult to analyze and calculate the dynamics of low-speed rail vehicles because they belong to multi-degree-of-freedom vibration systems. Most of the theoretical design methods rely 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 obtain relatively reliable simulation values ​​and make the vehicle have better performance. However, with the continuous development of the rail vehicle industry, people put forward higher require...

AI Technical Summary

Problems solved by technology

However, according to the available information, it is very difficult to analyze and calculate the dynamics of low-speed rail vehicles because they belong to multi-degree-of-freedom vibration systems. Most of the theoretical design methods rely 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 obtain relatively reliable simulation values ​​and make the vehicle have better performance. However, with the continuous development of the rail vehicle industry, people put forward higher requirements for the design of the damping coefficient of the secondary transverse shock absorber. The current method of designing the damping coefficient of the secondary transverse shock absorber cannot give a The innovative theory of guiding significance cannot meet the development of shock absorber design requirements under the rapid development of rail vehicles

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