裝載機(jī)柴油機(jī)工作過程中，在排氣閥處，氣體的流動(dòng)是不穩(wěn)定的，它以壓力波動(dòng)的方式，傳到排氣系統(tǒng)的出口，在尾管出口處，連速度波動(dòng)產(chǎn)生了輻射噪聲，主要包括三個(gè)方面，一是管壁的輻射噪聲，二是消音器壁的輻射噪聲，還有就是尾管出口的啟動(dòng)輻射噪聲。
Shandong loader diesel engine operation, the exhaust valve at the gas flow is unstable, it is a way to pressure fluctuations, reached the exit of the exhaust system, the tail pipe exit, even the speed fluctuations of the radiated noise mainly includes three aspects, namely radiated noise wall, the second is radiated noise muffler wall, there is a tail pipe exports started radiated noise.

 裝載機(jī)產(chǎn)生的排氣噪聲主要是排氣系統(tǒng)輻射出來的總噪聲，若將排氣系統(tǒng)的管壁和消音器壁假設(shè)為剛性的，則排氣噪聲指的是僅氣體動(dòng)力性噪聲。降低排氣噪聲最有效方法就是設(shè)計(jì)安裝一個(gè)高效、低阻力的排氣消音器。影響排氣噪聲的主要有發(fā)動(dòng)機(jī)轉(zhuǎn)速、氣缸數(shù)、負(fù)荷、排氣管尺寸等。
Shandong loader exhaust noise generated by the exhaust system is mainly radiated out of the total noise, when the wall of the exhaust system and muffler wall is assumed to be rigid, the exhaust noise refers only aerodynamic noise. The most effective way to reduce exhaust noise is the design and installation of a high efficiency, low resistance of the exhaust muffler. Exhaust noise affect mainly the engine speed, number of cylinders, load, exhaust pipe size and so on.