Optimization of device allowing variation of adhesion force for road vehicle testing at safe speed
2021
Jilek, P., University of Pardubice (Czech Republic) | Berg, J., University of Pardubice (Czech Republic)
In this paper the authors discuss optimizing the key point of the subframe. The objective of the paper is to optimize the current design of the Alternative SkidCar frame. It is an auxiliary device, which attaches to the chassis of the car and allows controlled variation of the adhesion force transmitted between the wheels and the ground. The current form of the frame is assembled only from the point of view of functionality. The frame is obviously designed to make production as simple as possible. At the same time, it is oversized in terms of material. Optimization consists of finding a key construction node, which is the weakest point of the frame structure, while minimizing the weight, using the finite element method. Subsequently, we used the finite element method simulation for another material and we evaluated the current form of mechanical stress in this node, achieving a minimized weight. A new software study of the proposed design was subsequently performed. Based on the conclusions of the paper, the weight of the Alternative SkidCar frame was significantly reduced while respecting the required load capacity. Because the frame of the Alternative SkidCar is attached to the car as an accessory, it is desirable that it influences the vehicle’s behaviour minimally. The change was made by reducing the thickness of the material profile and changing the material used. Just reducing the weight of the frame – it is this change that has a significant positive effect on the behaviour of the car, complemented by the Alternative SkidCar system.
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