Design method for optimal damping ratio of primary vertical suspension of high-speed rail vehicle

Abstract

The invention relates to a design method for an optimal damping ratio of a primary vertical suspension of a high-speed rail vehicle, and belongs to the technical field of suspension of high-speed rail vehicles. According to the design method, a target function of a damping ratio of a primary vertical suspension system is established by establishing a two-degree-of-freedom driving vertical vibration model of a 1/4 vehicle body of the high-speed rail vehicle, the optimal damping ratio and a maximum allowable damping ratio of the primary vertical suspension system are calculated, and the optimal damping ratio of the primary vertical suspension system is calculated by utilizing a golden section principle. Through design instances and SIMPACK simulation verification, the method can obtain accurate and reliable optimal damping ratio of the primary vertical suspension system, and the reliable design method is provided for the design of the damping ratio of the primary vertical suspension of the high-speed rail vehicle. With the method, the design level and the product quality of the suspension system of the high-speed rail vehicle can be improved, the riding comfort and safety of the vehicle can be improved, the product design and test expenses can be reduced, and the international market competitiveness of rail vehicles in China can be enhanced.

Description

technical field [0001] The invention relates to a high-speed rail vehicle suspension, in particular to a design method for the optimal damping ratio of the primary vertical suspension of the high-speed rail vehicle. Background technique [0002] The primary vertical suspension system can effectively alleviate the wheel-rail impact and isolate the damage caused by high-frequency impact to the vehicle. The design or selection of its damping ratio is the basis for designing the parameters of the shock absorber valve system of the primary vertical suspension system. Important parameters. Although scholars have done a lot of research on the damping ratio of the primary vertical suspension system of rail vehicles. Ratio (ξ=0.1925), but the damping ratio of a series of vertical suspension systems with practical application value has not been given. According to the information we have consulted, at present, the design of the damping ratio of the primary vertical suspension system...

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Problems solved by technology

According to the information we have consulted, at present, the design of the damping ratio of the primary vertical suspension system of high-speed rail vehicles at home and abroad mostly selects a certain damping ratio according to experience (usually the empirical damping ratio is 0.2-0.3), and then, with the help of computer Technology, using the multi-body dynamics software SIMPACK or ADAMS / Rail, through solid modeling to optimize and determine its size, although this method can get more reliable simulation values, so that the vehicle has better dynamic performance, however, with the track With the continuous improvement of vehicle speed, people put forward higher requirements for the design of the damping ratio of the primary vertical suspension system of high-speed rail vehicles. Innovative theory cannot meet the development of shock absorber design requirements under the condition of continuous speed increase of rail vehicles

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