Analytic calculating method for optimal damping ratio of secondary vertical suspension of low-speed rail vehicle

An optimal damping ratio, secondary vertical technology, applied in calculations, special data processing applications, instruments, etc., can solve problems such as dynamic analysis and calculation difficulties, and no systematic analytical calculation methods are given.

Inactive Publication Date: 2015-11-18
SHANDONG UNIV OF TECH
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  • Abstract
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  • Claims
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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, there has been no design of the damping ratio of the secondary vertical suspension of the low-speed rail vehicle 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

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  • Analytic calculating method for optimal damping ratio of secondary vertical suspension of low-speed rail vehicle
  • Analytic calculating method for optimal damping ratio of secondary vertical suspension of low-speed rail vehicle
  • Analytic calculating method for optimal damping ratio of secondary vertical suspension of low-speed rail vehicle

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Embodiment Construction

[0036] specific implementation plan

[0037] The present invention will be further described in detail through an embodiment below.

[0038] The full load mass of a 1 / 4 single-section car body of a low-speed rail vehicle m 2 =14228kg, half of the mass of a single bogie frame m 1 =1155kg; The vertical equivalent stiffness K of each axle box positioning device 1 =1.48×10 6 N / m; the stiffness K of the secondary vertical suspension 2 =561.68kN / m; End connection stiffness K of the secondary vertical shock absorber d2 =20×10 6 N / m; the damping ratio of the secondary vertical suspension to be designed is ξ, where the equivalent damping coefficient of the secondary vertical shock absorber The optimal damping ratio of the secondary vertical mount of the low-speed rail vehicle is designed.

[0039] The analytical calculation method of the optimum damping ratio of the vertical mount of the low-speed rail vehicle secondary system provided by the example of the present invention, i...

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Abstract

The invention relates to an analytic calculating method for the optimal damping ratio of a secondary vertical suspension of a low-speed rail vehicle and belongs to the technical field of vehicle suspensions of low-speed rail vehicles. A 1/4 vehicle body four-degree-of-freedom running vertical vibration model of the low-speed rail vehicle is established, a target function of the optimal damping ratio of the secondary vertical suspension is established based on a random vibration theory, analytic calculating is conducted, and therefore the optimal damping ratio of a secondary vertical suspension system of the low-speed rail vehicle is obtained. It can be known through a design example and SIMPACK simulation verification that the accurate and reliable optimal damping ratio of the secondary vertical suspension system can be obtained, and the reliable design method is provided for design of the damping ratio of the secondary vertical suspension of the low-speed rail vehicle. By means of the method, the design level and the product quality of the suspension system of the low-speed rail vehicle can be improved, and the riding comfort of the vehicle is improved; meanwhile, the product designing and testing cost can also be reduced, the product design period is shortened, and the international market competition ability of the track vehicle of China is improved.

Description

technical field [0001] The invention relates to a low-speed rail vehicle mount, in particular to an analytical calculation method for the optimum damping ratio of a secondary vertical mount of a low-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 low-speed rail vehicles, and its design or selection is an important parameter for designing the valve system parameters of the secondary vertical shock absorber. 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, there has been no design of the damping ratio of the secondary vertical suspension of the low-speed rail vehicle at home and abroad. The analytical calculation method of the system mostly selects a certain damping ratio according to experience (usually the emp...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 周长城于曰伟赵雷雷
Owner SHANDONG UNIV OF TECH
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