| 摘要 |
The automobile (1) is fitted with a reference system linked to the ground. The vehicle wheels driven at a given speed (V) on a ground mounted roller system (3,3') having a rolling surface obstacles (4.4') of pre-determined size. The method has the following stages: - in a first time period, obtain a global transfer function of the vehicle fitted with the reference system connected to the ground by measuring the noise and/or vibration level inside the vehicle when its wheels are rotating on the rollers to produce the speed (V). Measure or calculate by means of a functional digital model the force at reference system chassis attachment points; - in a second time period, measure or calculate by means of the functional digital model the force at the reference system chassis attachment points in the same rolling conditions as previously used; - during a third time period, calculate the noise and/or vibration in the vehicle by multiplying the transfer global function by the forces at the reference system attachment points to the chassis.
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