Analytic calculation method of optimal damping ratio of two-line vertical suspension of high-speed railway vehicle

Abstract

The invention relates to an analytic calculation method of an optimal damping ratio of the two-line vertical suspension of a high-speed railway vehicle, and belongs to the technical field of the high-speed railway vehicle suspension. A 1 / 4 vehicle body four-degree-of-freedom driving vertical vibration model is established, the optimal human body riding comfort and minimum vertical force borne on a wheel set and an axle are independently taken as a design target, calculation is carried out to obtain the optimal damping ratio of a two-line vertical suspension system on the basis of comfort and safety, and the calculation is carried out to obtain the optimal damping ratio of the two-line vertical suspension system by a golden section principle. Through a design example and SIMPACK simulation verification, the method can obtain the accurate and reliable optimal damping ratio of the two-line vertical suspension system, and provides a reliable design method for the design of the damping ratio of the two-line vertical suspension of the high-speed railway vehicle. The method can improve the design level of the suspension system of the high-speed railway vehicle, and vehicle riding comfort and safety, can lower design and experiment cost and enhances the international market competitiveness of the railway vehicle in China.

Description

technical field [0001] The invention relates to a high-speed rail vehicle mount, in particular to an analytical calculation method for the optimal damping ratio of a secondary vertical mount of a high-speed rail vehicle. Background technique [0002] The damping ratio of the secondary vertical suspension system has an important impact on the ride comfort and safety of high-speed rail vehicles, and its design or selection is an important parameter for the design of the shock absorber valve system parameters of the secondary vertical suspension system. . However, according to the information obtained, it is very difficult to analyze and calculate the dynamics of the rail vehicle because it is a multi-degree-of-freedom vibration system. At present, the design of the damping ratio of the secondary vertical suspension of the high-speed rail vehicle has not been given at home and abroad. The analytical calculation method of the system mostly selects a certain damping ratio accord...

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Problems solved by technology

However, according to the information obtained, it is very difficult to analyze and calculate the dynamics of the rail vehicle because it is a multi-degree-of-freedom vibration system. At present, the design of the damping ratio of the secondary vertical suspension of the high-speed rail vehicle has not been given at home and abroad. The analytical calculation method of the system mostly selects a certain damping ratio according to experience (usually the empirical damping ratio is 0.2-0.45), and then, with the help of computer technology, the multi-body dynamics simulation software SIMPACK or ADAMS / Rail is used to carry out solid modeling. Optimizing and determining its size, although this method can obtain relatively reliable simulation values, so that the vehicle has better dynamic performance, however, with the continuous increase in the speed of rail vehicles, people's design of the damping ratio of the secondary vertical suspension Higher requirements are put forward. The current method for the design of the damping ratio of the secondary vertical suspension 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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