Analytical Calculation Method for Optimum Damping Ratio of Secondary Lateral Mounts of High Speed ​​Rail Vehicles

Abstract

The invention relates to an analytical calculation method for an optimal damping ratio of a secondary lateral mount of a high-speed rail vehicle, and belongs to the technical field of high-speed rail vehicle mounts. The present invention establishes a 1 / 2 car body running yaw vibration model, and takes the best riding comfort of the human body and the minimum lateral force on the wheel set and wheel axle as the design goals, and calculates the secondary lateral suspension based on comfort and safety. The optimal damping ratio of the system is calculated, and the optimal damping ratio of the secondary lateral suspension system is calculated by using the golden section principle. 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 secondary lateral mount system, and provides a reliable design method for the design of the damping ratio of the secondary lateral mount 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 and safety of the vehicles; at the same time, it can also reduce the 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 analytical calculation method for the optimum damping ratio of the secondary lateral mount of the high-speed rail vehicle. Background technique [0002] The damping ratio of the secondary lateral suspension system has an important influence on the ride comfort and safety of high-speed rail vehicles, and its design or selection is an important parameter for designing the shock absorber valve system parameters of the secondary lateral suspension system. However, according to the available information, since the rail vehicle is a multi-degree-of-freedom vibration system, it is very difficult to perform dynamic analysis and calculation on it. At present, there is no system for the design of the damping ratio of the secondary lateral mount of the high-speed rail vehicle at home and abroad. Most of the analytical calculation methods are to select a certain damping ratio based on ex...

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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 perform dynamic analysis and calculation on it. At present, there is no system for the design of the damping ratio of the secondary lateral mount of the high-speed rail vehicle at home and abroad. Most of the analytical calculation methods are to select a certain damping ratio based on experience (usually the empirical damping ratio is 0.2-0.4), and then, with the help of computer technology, use the multi-body dynamics simulation software SIMPACK or ADAMS / Rail to optimize the and determine its size, although this method can obtain more reliable simulation values, so that the vehicle has better dynamic performance, however, with the continuous increase in the speed of rail vehicles, people put forward the design of the damping ratio of the secondary lateral suspension Higher requirements, the current method for the design of the damping ratio of the secondary lateral mount cannot provide an innovative theory with guiding significance, and cannot meet the development of the design requirements of the shock absorber under the condition of continuous speed increase of rail vehicles

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