外文翻譯----降低汽車噪聲的方法-汽車設(shè)計(jì)-免費(fèi)閱讀
【正文】 用更柔韌橡膠作為輪胎原理，可以進(jìn)一步降低輪胎產(chǎn)生的噪音。噪聲水平取決于發(fā)電機(jī)磁場(chǎng)結(jié)構(gòu)和通風(fēng)系統(tǒng)，以及發(fā)電 機(jī)的制造精密性和裝配情況。在這方面，最有效的方法是攝入消聲器的使用。阻尼處理的方法是阻尼材料和其組成部分的振動(dòng)能量消耗。對(duì)噪聲源的控制是最根本，最直接的措施，包括降低噪音，減少振動(dòng)影響力和振動(dòng)的響應(yīng)，這意味著聲源轉(zhuǎn)化為局部振蕩器。國(guó)內(nèi)目前的數(shù)據(jù)規(guī)定，巴士的噪音不得高于 ，輕卡的噪音不得高于 82dBA。因此振動(dòng)，噪聲和舒適性三方面是密切相關(guān)的，既要減少振動(dòng)，降低噪音，而且還要提高乘坐舒適性，保證產(chǎn)品經(jīng)濟(jì)性，使車輛的噪音控制在標(biāo) 準(zhǔn)范圍內(nèi)。 are threeaxis rotational control balance degrees, to reduce torsional vibration. Electric equipment noise (1) cooling fan noise Cooling fan noise happened devices are subject to wind retaining ring, water pump, radiator and transmission, but the noise generated depends primarily on the chassis. (2) automobile generator noise Automotive generator noise depends on the effects of a variety of sources, these sources have mag source, mechanical and air power source. Noise level depends on the generator magic structure and ventilation systems, as well as generators precision manufacturing and assembly. Body Noise As the speed increased, the body will be more and more noise, and air power are the main causes of noise. Therefore, the following programs to improve the body noise: First, to streamline the design of the body, achieve a smooth transition。 excessive noise can damage hearing the driver will enable the rapid driver fatigue, thus driving security constitutes a grave threat. So noise control, is also related to motor vehicle durability and safety. Thus vibration, noise and fort are the three closely related, it is necessary to reduce vibration, reduce noise, but also improve ride fort, and ensure the product economy, vehicle noise control in the standard range. One type of noise arising from car noise are the main factors of air power, mechanical drive, the electromagic three parts. From the structure can be divided into the engine (ie, bustion noise), the chassis noise (ie, power train noise, all ponents connected with the noise), electrical equipment, noise (cooling fan noise, car noise generator), body noise (such as body structure, shape and attachment installation unreasonable noise). One of the engine noise accounted for more than half of motor vehicle noise, including noise and body intake noise (such as engine vibration, the rotational axis Valve, Jin, door switches, such as exhaust noise). Therefore the engine vibration, noise reduction has bee a key automotive noise control. noise requirements of regulations in Europe, from October 19
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1