The tire-wheel system is an important component of a passenger car. Continental, Polytec and Daimler analyze the three-dimensional vibrations of this complex system attached to the front axle of an executive-class car. A mathematical model of the rolling tire-wheel is derived using the FE method and coupled to a model of the vehicle. Measurements with a 3-D scanning laser Doppler vibrometer show the validity of the models for the NVH performance of the complete vehicle.
COMPLEX – MORE THAN 20 COMPONENTS FOR A TIRE
The primary function of a tire-wheel system is to support the vehicle load, and to transmit the forces to the road required to accelerate, brake and turn corners. Conversely, it is also responsible for the reduction of vibrations and noise, experienced by the occupants due to irregularities of the road surface. With the reduction of combustion engine noise, the advent of alternative drive systems, and weight reduction of components, this secondary function is only growing in importance. In addition to the increasing demands on the Noise, Vibration, and Harshness (NVH) performance of the tire, there is a strong demand for the reduction of development costs and time, and therefore a need for accurate and efficient numerical methods to aid the development process.
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This article was published in ATZ worldwide 3/2020