Theoretical Investigation of the Driving Response of Articulated Buses

Vlk, F.

doi:10.4271/845096

Cited by 2 publications

(2 citation statements)

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“…Forces and loads are variable and must be based on driving limit states. To determine it, we use the equations of motion [9]. For these purposes, the moments of forces acting during cornering and braking were chosen.…”

Section: Measurement Methodologymentioning

confidence: 99%

Development of methodology for multiaxial dynamic testing of materials for automotive construction groups

FOJTÍK,

VÁŇOVÁ

2023

METAL Conference Proeedings

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The current automotive industry requires weight savings in the components used in the production of vehicles. At the same time, however, the demand for safety, high strength and fatigue life is increasing. This study aims to create a comprehensive methodology that will help designers and material engineers choose the appropriate technical solution and material for a highly stressed axle element. Specifically, the possibility of replacing the front axle weight produced from ductile iron with a high-strength aluminium alloy EN AW-7075 in T6 condition is addressed. As part of the solution concept, a 3D model was created and, using the finite element method (FEM), a simulation of the response of the mass to the load corresponding to traffic on the road was carried out. Furthermore, the technological procedure for testing automotive components using a multi-axis dynamic testing facility was established, where the DIC (Digital Image Correlation) method was used to evaluate load states and deformations. The basic limit states of vehicle operation, braking and cornering were tested. The work also deals with material factors that influence the choice of a suitable alloy, and verification of the degree of safety of the structural and material solution. The measurement results from both methods were compared with the contractual yield strength and fatigue strength. The results of FEM simulations and measurements using DIC positively verified the possibility of changing the material of the block, from ductile cast iron to EN AW-7075 strength aluminium alloy in T6 condition. The described methodology can therefore be used in the design, construction and implementation of car prototype chassis.

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Section: Measurement Methodologymentioning

confidence: 99%

Development of methodology for multiaxial dynamic testing of materials for automotive construction groups

FOJTÍK,

VÁŇOVÁ

2023

METAL Conference Proeedings

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“…Disc articulated systems are generally used in low-foor articulated vehicles equipped with hydraulic dampers on each side. Tey can efectively improve the overall dynamic performance of the vehicle by suppressing the lateral sway and roll motions [7][8][9]. Scholars worldwide have conducted relatively little research on disc-articulated systems and have mainly focused on damping control and structural design.…”

Section: Introductionmentioning

confidence: 99%

Damping Coefficient Optimization for the Articulated System of Virtual Track Trains

Li,

Ji,

Huang

et al. 2024

Shock and Vibration

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Virtual track trains are a new type of rail transportation because the multisection formation structure leads to more degrees of freedom of the vehicle, which may cause unstable phenomena, such as tailing, cross-swing, and folding, affecting the stability and ride comfort of the vehicle driving. To explore the effect of damping coefficient of the articulated systems on vehicle dynamics performance, a vehicle system dynamics model is established based on the actual parameters of a three-module six-axle virtual track train. According to ISO14791: 2000, select typical working conditions such as straight line, lane change, and 1/4 circle curve, and optimize the damping coefficient of the articulated systems through co-simulation. The study shows that under straight-line conditions, increasing the damping coefficient can effectively suppress the yaw angular acceleration and improve the lateral ride comfort of the vehicle but has little effect on the vertical ride comfort. Under lane change conditions, too large or small damping coefficients will deteriorate the train’s lateral stability, and a reasonable damping coefficient will improve the yaw damping ratio of the vehicle and reduce the lateral sway vibration between vehicles. Under the 1/4 circle curve conditions, the additional articulated system damper will reduce the vehicle’s curve passing performance. In this paper, the articulation stability of multimodule fully connected vehicles is analyzed and optimized for the first time, and the damping coefficient control strategy is given based on the geometric tracking control method. The research results are of great significance for the parameter selection of virtual track trains’ articulated system and the design and development of specialized articulated systems for related vehicles.

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Theoretical Investigation of the Driving Response of Articulated Buses

Cited by 2 publications

References 0 publications

Development of methodology for multiaxial dynamic testing of materials for automotive construction groups

Development of methodology for multiaxial dynamic testing of materials for automotive construction groups

Damping Coefficient Optimization for the Articulated System of Virtual Track Trains

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