外文翻譯----降低汽車噪聲的方法-汽車設(shè)計-wenkub.com
2025-05-07 11:19 本頁面
【正文】 這建立在對消聲器技術(shù)的發(fā)展上，其原理是：在噪聲和振動的對立階段使用電子消聲系統(tǒng)，是其相互抵消，以降低噪音。胎面面積越大，產(chǎn)生的噪音也越大。降低車身噪音主要有下面幾種方法：第一，盡量是車身呈流線型，實現(xiàn)平穩(wěn)過渡 。 電子設(shè)備的噪音 （ 1） 風(fēng)扇冷卻噪音 風(fēng)扇冷卻設(shè)備的噪聲產(chǎn)生受風(fēng)力保持環(huán)，水泵，散熱器和傳動裝置的影響，但噪音的產(chǎn)生主要取決于底盤。要結(jié)合空氣過濾器（即在空氣過濾器的附加諧振腔和吸聲材料，例如， R3238）已成為最有效的攝入量消聲器，消聲器的音量攝入量超過 20dBA。柴油機增壓器噪聲主要是渦輪增壓器壓縮機進氣噪音。顯然，通過共振幅度減少和加快自由振動衰減，減少了各部分的傳真能力，部分達到或超過臨界頻率的隔振能力增加。此外，給發(fā)動機涂阻尼材料是一種有效的方法。機動車輛和車輛的振動和噪音的降低水平，經(jīng)濟性，可靠性及強度，剛度，質(zhì)量，生產(chǎn)成本和使用密切相關(guān)。 除了有限元法（ FEM）和邊界元法（ BEM），仿真技術(shù)已廣泛應(yīng)用。 對汽車噪音的評估與評價主要有，車 外的噪音和緩振性。日本的法律和法規(guī)規(guī)定，在未來的 10 年小型車的噪音標(biāo)準(zhǔn)控制在 76dBA 以下。從結(jié)構(gòu)上可分為發(fā)動機（即燃燒噪聲），底盤噪聲（即動力傳動噪音，與噪聲有關(guān)的所有組件），電氣設(shè)備，噪聲（冷卻風(fēng)扇的噪音，汽車噪音發(fā)生器），車身噪音（如車身結(jié)構(gòu)，形狀和附件安裝不合理的噪音）。而且，所有的這些來自震動的噪聲，無疑的還能夠?qū)е履承┝慵脑缙谄趽p傷，從而減少了汽車的使用壽命；高分貝的噪聲還會損害駕駛員的聽覺使駕駛員在短時間內(nèi)感到駕駛疲勞，這樣就對安全駕駛就構(gòu)成了嚴(yán)重的威脅。 third， interior is softened, such as Inner Mongolia at the roof and body skin the use of soundabsorbing material. In addition, the car at high speed when the tire is also a source of noise. Tire Tread greater, then the greater the noise. In addition, the tire tread with the noise generated also have a great relationship, there is a reasonable choice of the pattern of steel cord for radial tires to reduce tire noise are an effective way. Materials for the tire, the use of more flexible and soft rubber with high, you can create a lownoise tires. Other measures Automobile noise control, except in the design on the use of optimization methods and optimization of selected ponents, it can also carry out active control of noise. This is based on sound muffler technology, the principle is: the use of electronic muffler system with the opposite phase of the acoustic noise, vibration so that the two cancel each other out in order to reduce the noise. This muffler device used extremely advanced electronic ponents, has excellent noise reduction effect can be used to reduce vehicle noise, engine noise, the engine could also be used to proactively support systems, to offset the engine vibration and noise. 降低汽車噪聲的方法 隨著汽車工業(yè)的迅猛發(fā)展，對車輛的舒適性 ,緩震性和噪聲有了越來越嚴(yán)格的要求。s laws and regulations, small car in the next decade to control noise standards at the following 76dBA. A number of domestic cities are also planning to traffic trunk lines in 2020 to control noise at the average of less than 70dBA. According to the domestic current data indicate that the domestic value of bus noise permit shall not exceed 82dBA, light trucks for . This
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