Influence of braking on dynamic stability of car-trailer combinations

Zhang, Ning; Wu, Jianhua; Li, Tian; Zhao, Ziqian; Yin, Guodong

doi:10.1177/0954407020959895

Cited by 2 publications

(3 citation statements)

References 21 publications

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“…With the help of ASC, it was possible to optionally change the radial reactions of the vehicle wheels and thus their adhesion [31]. The auxiliary wheels of the alternative SkidCar system were free to rotate around the vertical axis, so they did not lead the vehicle, but only transmitted vertical forces.…”

Section: Methodsmentioning

confidence: 99%

Influence of the Weld Joint Position on the Mechanical Stress Concentration in the Construction of the Alternative Skid Car System’s Skid Chassis

2021

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This paper deals with the optimization of the crossbars, parts of the existing frame of the experimental system of the Alternative SkidCar. This part plays a crucial role and is designed to enable and ensure reduced adhesion conditions between the vehicle and the road. To this end, its optimization targeted here is performed using both analytical calculations and simulations in MSC Adams software, wherein the loading forces and boundary conditions on the frame support wheels are obtained considering the static conditions, as well as the change of the direction of travel. The least favourable load observed was used, later on, as the input value for the strength analysis of the frame. The analysis was performed using the finite element method (FEM) in SolidWorks. Based on the linear and nonlinear analyses performed, the course of stress on the frame arms and critical points with the highest stress concentration were determined. Subsequently, according to the results obtained, a new design for the current frame was proposed and, thereby, warrants greater rigidity, stability and strength to the entire structure, while reducing its weight and maximizing the potential of the selected material. The benefit of the current contribution lies in the optimization of the current frame shape, in terms of the position of weld joints, the location of the reinforcements and the thickness of the material used.

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Section: Methodsmentioning

confidence: 99%

Influence of the Weld Joint Position on the Mechanical Stress Concentration in the Construction of the Alternative Skid Car System’s Skid Chassis

2021

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“…Similarly, the equivalent rotation angle d y of the rack displacement to the kingpin can be further expressed as equation (12).…”

Section: Modeling Of the Full Vehiclementioning

confidence: 99%

“…The simulation results showed that the stability of the CTC depended largely on the damping at the hitch point when braking, but excessive damping was not conducive to the suppression of body sway. Zhang et al 12,13 also had a series of work on the dynamic stability of CTC. He proposed a parameter identification method based on time-frequency analysis for time-varying vehicle dynamics.…”

Section: Introductionmentioning

confidence: 99%

A study on body sway of car-trailer combinations considering dry friction in steering subsystem

Zhang

Geng

Tian

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Considering the stability of vehicle system, static instability and dynamic instability are two different instability problems. Because of the dynamic coupling between car and trailer, the problem of dynamic stability of car-trailer combination (CTC) is more obvious. This instability is called body sway or flutter in engineering, its boundary is often described by dynamic critical speed ( vcrit). It has been proved by experiments that the steering system characteristics have an important impact on the dynamic stability of CTC, but the specific mechanism is not clear. In this paper, the characteristic and influence of steering subsystem are studied for the first time. Firstly, a 6-DOF nonlinear dynamic model of CTC is established by Lagrange equation. The steering subsystem characteristics, incl. stiffness, damping, rotational inertia, and dry friction, are considered in theoretical modeling. On this basis, the influences of steering characteristics, especially the dry friction, on vcrit and axle cornering stiffness of CTC are analyzed. Simulation results show that the vcrit can increase by 16% and 23.2% respectively via adjusting the steering stiffness and the sliding friction factor. Therefore, a fine selection of steering subsystem characteristics can effectively improve the dynamic stability and safety of CTC. The research results of this paper can provide reference for the design of steering system considering dynamic stability.

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Influence of braking on dynamic stability of car-trailer combinations

Cited by 2 publications

References 21 publications

Influence of the Weld Joint Position on the Mechanical Stress Concentration in the Construction of the Alternative Skid Car System’s Skid Chassis

Influence of the Weld Joint Position on the Mechanical Stress Concentration in the Construction of the Alternative Skid Car System’s Skid Chassis

A study on body sway of car-trailer combinations considering dry friction in steering subsystem

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