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Freight car front wheel shimmy system lateral damper optimum speed characteristics design method

A technology for lateral shock absorbers and front wheels of trucks, which is applied in the fields of instruments, calculations, special data processing applications, etc., can solve the problems of difficult matching of lateral shock absorbers to achieve the best damping, and no reliable design methods are given.

Inactive Publication Date: 2015-12-23
SHANDONG UNIV OF TECH
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Problems solved by technology

However, according to the available information, since the velocity characteristics of the lateral shock absorber are nonlinear and restricted by the optimal damping matching theory of the lateral shock absorber of the truck front wheel shimmy system, the domestic and foreign research on truck front wheel shimmy The design of the velocity characteristics of the lateral shock absorber of the system has not yet given a reliable design method. Most of them are based on the type of truck and select several similar types of lateral shock absorbers based on experience. The lateral shock absorber and speed characteristics matching the truck
Although this method can obtain more reliable velocity characteristics of the lateral shock absorber, this method can only approximate the velocity characteristics of the lateral shock absorber of the truck front wheel shimmy system, and it is difficult to achieve the optimum damping matching of the lateral shock absorber. good

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  • Freight car front wheel shimmy system lateral damper optimum speed characteristics design method
  • Freight car front wheel shimmy system lateral damper optimum speed characteristics design method
  • Freight car front wheel shimmy system lateral damper optimum speed characteristics design method

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[0053] specific implementation plan

[0054] The present invention will be further described in detail through an embodiment below.

[0055] Equivalent angular stiffness K of the steering tie rod of a truck 1 =49.1kN.m / rad, the equivalent angular stiffness K of the steering column of the front wheel steering system 3 =30.41kN.m / rad; Steering tie rod equivalent angular damping C 1 =30N.m.s / rad, steering column equivalent angular damping C 3 =70N.m.s / rad; Suspension system vertical stiffness K 2 =6.06kN.s / m, shock absorber equivalent damping coefficient C 2 =1.72kN.s / m; tire vertical stiffness K t= 850kN / m, lateral stiffness ρ = 190kN / m, cornering stiffness k = 94kN.m / rad, mechanical drag moment β = 0.06m; moment of inertia of left and right front wheels around kingpin I = 20kg.m 2 , the moment of inertia I of the wheel around its own axis w =12.96kg.m 2 , the moment of inertia of the front axle around the roll axis J=31.88kg.m 2 ;The arm length d of the steering knuckl...

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Abstract

The present invention relates to a freight car front wheel shimmy system lateral damper optimum speed characteristics design method, and belongs to the technical field of freight car front wheel shimmy systems. By establishing a freight car front wheel shimmy system three degree of freedom (DOF) traveling vibration model, an optimum damping coefficient of a lateral damper is obtained by calculation; and by utilizing a smoothmess-to-safety ratio and a bilateral contrast of the car front wheel shimmy system lateral damper, the optimum speed characteristics of the lateral damper are designed, and a nonlinear segmentation characteristic curve, of a recovery stroke and a compression stroke of the lateral damper, meeting design requirements is obtained. Through design examples and damper characteristic tests, the optimum speed characteristics curve of the freight car front wheel shimmy system lateral damper can ba accurately and reliably obtained, and a reliable design method can be provided for design of the speed characteristics of the freight car front wheel shimmy system lateral damper. By using the method, a design level and vehicle travelling safety of the freight car lateral damper can be raised, design and test expenses can also be lowered, and a product development cycle is shortened.

Description

technical field [0001] The invention relates to a truck front wheel shimmy system, in particular to a method for designing the optimum speed characteristics of a transverse shock absorber of the truck front wheel shimmy system. Background technique [0002] The speed characteristics of the transverse shock absorber have an important influence on the ride comfort, safety and handling stability of the truck at high speed. However, according to the available information, since the velocity characteristics of the lateral shock absorber are nonlinear and restricted by the optimal damping matching theory of the lateral shock absorber of the front wheel shimmy system of trucks, at present domestic and foreign studies on the front wheel shimmy of trucks So far, no reliable design method has been given for the design of the velocity characteristics of the lateral shock absorber of the system. Most of them are based on the types of trucks, and several similar types of lateral shock ab...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 周长城提艳赵雷雷于曰伟
Owner SHANDONG UNIV OF TECH
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