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1 噪声分析经分析,QQ361型10t级自卸车噪声过高有下述原因:(1)发动机选型不当。发动机是汽车的主要噪声源。我国汽车发动机噪声在总噪声中约占55％～70％,特别是原车发动机功率偏低,常处于大油门下工作,噪声更大。(2)一般性机械噪声大。该车车速低,显然空气阻力噪声不会太大。因该车工况条件差,路面不平,由一般结构件和转动零部件产生的噪声也较大。
Analysis of a noise analysis, QQ361 10t dump truck noise is too high for the following reasons: (1) improper selection of the engine. The engine is the main source of noise for cars. China’s car engine noise in the total noise of about 55% to 70%, especially the original car engine power is low, often at work under the big throttle, the noise is greater. (2) general mechanical noise. The car speed is low, it is clear that air resistance noise will not be too large. Due to poor conditions of the car working conditions, uneven road surface, the noise generated by the general structure and rotating parts are also larger.