METHOD FOR PREDICTING THE NOISE/COMFORT PERFORMANCE OF A VEHICLE TRAVELLING ON UNEVEN GROUND
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Accused Products
Abstract
A method is presented for predicting a noise/comfort performance in a cabin of a vehicle with a body-shell and a suspension system linked to the body-shell by at least one point of attachment, with the vehicle rolling at a given speed on a rolling device with a macrorough rolling surface. The method includes: determining a global transfer function of the body-shell, determining a global admittance of the body-shell, determining an impedance of the suspension system, determining, while rolling on the macrorough rolling surface, lockup loads of the suspension system, and combining together the global transfer function of the body-shell, the global admittance of the body-shell, the impedance of the suspension system, and the lockup loads of the suspension system to obtain a prediction of noise/comfort performance (P) inside the cabin.
4 Citations
36 Claims
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1-17. -17. (canceled)
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18. A method for predicting noise/comfort performance corresponding to an acoustic and/or vibratory level in a cabin of a vehicle with a body-shell and a suspension system linked to the body-shell by at least one point of attachment, the vehicle rolling at a given speed V on a rolling device that includes on its rolling surface at least one irregularity of a predetermined dimension, the method comprising:
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determining a global transfer function of the body-shell for a point of attachment to the cabin (Tbody-shell); determining a global admittance of the body-shell for a point of attachment of the suspension system to the body-shell (Ybody-shell); determining a global impedance of the suspension system for the point of attachment to the body-shell (ZS); determining, while rolling, lockup loads of the suspension system at the point of attachment to the body-shell (FSb); and combining together the global transfer function of the body-shell, the global admittance of the body-shell, the global impedance of the suspension system, and the lockup loads of the suspension system to obtain a prediction of a noise/comfort performance (P) inside the cabin. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 33, 35)
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31. A method for predicting operational loads at a point of attachment of a vehicle that includes a body-shell and a suspension system linked to the body-shell by at least one point of attachment, the vehicle rolling at a given speed V on a rolling device that includes on its rolling surface at least one irregularity of a predetermined dimension, comprising:
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determining an admittance of the body-shell for the point of attachment of the suspension system to the body-shell (Ybody-shell); determining an impedance of the suspension system for the point of attachment (ZS); determining, while rolling, lockup loads of the suspension system at the point of attachment (FSb); and combining together the admittance of the body-shell, the impedance of the suspension system, and the lockup loads of the suspension system. - View Dependent Claims (32, 34, 36)
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Specification