轿车车内振动噪声源的识别

汽车振动和噪声是影响舒适性的主要因素，如何采用有效的技术手段识别控制汽车的振动、噪声日益受到人们重视。本文通过采用阶次跟踪技术和选择性声强技术对国产轿车在给定工况下进行了测试分析，确定出试验车发动机仓内噪声的最大位置、驾驶室内司机耳旁辐射噪声产生的原因，测试分析了驾驶室内司机座位处振动、噪声随发动机转速变化的关系，为进一步控制和降低轿车车内的噪声和振动响应提供了分析参考和依据。

Noise and Vibration Source Identification in Passenger Car

Vehicle noise and vibration are major factors that affect the comfort of passengers,so how to effectively measure and analyze automotive noise and vibration is becoming more and more important. In this paper, the order tracking technique and the selective intensity technique are used to analyze and determine the noise and vibration source on homemade passenger car. The main purpose is to determine the noise of the testing car engine compartment and the reason of noise near driver's ear in the driver cab. The relations between noise which is near the driver seat and engine speed are tested. Analysis gist and reference to further reduce automotive noise and vibration are given.