【摘要】：隨著汽車行業(yè)的飛速發(fā)展和人們生活水平的不斷提高，汽車已經(jīng)從以前的奢侈品變成了人們生活中的必需品，人們除了對汽車的動力、操縱等性能有更高要求以外，對汽車的噪聲、振動及舒適性即NVH性能也有更高的要求。因而各國花了很大氣力在汽車NVH的研究上。而解決這類NVH問題的手段也是多種多樣，其中統(tǒng)計(jì)能量分析（SEA）就是其中重要的一種。 降低車內(nèi)噪聲的主要方法是降低噪聲源和提高噪聲傳遞路徑上的隔絕能力。本文就從隔絕噪聲源方面開始通過一個(gè)實(shí)例及相應(yīng)的測試數(shù)據(jù)分析闡述了對于車內(nèi)噪音控制采取的一些方法，介紹了目前被廣泛運(yùn)用在汽車行業(yè)的噪音測試方法和一些指標(biāo)。 首先是對整車原始狀態(tài)作基本的摸底測試并改進(jìn)整車密封性能，同時(shí)收集車輛子系統(tǒng)的表單信息，然后建立該車型的SEA模型，對其室內(nèi)噪聲進(jìn)行預(yù)測。其次在得到以上的一些初步測試結(jié)果和SEA模型之后對整車的聲學(xué)包進(jìn)行優(yōu)化設(shè)計(jì)，根據(jù)優(yōu)化設(shè)計(jì)結(jié)果進(jìn)行材料的準(zhǔn)備并在車輛上進(jìn)行測試驗(yàn)證，通過實(shí)際測試結(jié)果進(jìn)一步對聲學(xué)包設(shè)計(jì)進(jìn)行優(yōu)化最終達(dá)到初始設(shè)計(jì)目標(biāo)。 車內(nèi)測試的位置為駕駛員右耳處。從測試結(jié)果看，SEA的計(jì)算結(jié)果對整車在高頻的降噪起到了指導(dǎo)性的作用，節(jié)約了時(shí)間和成本，，意外收獲是在提高整車NVH性能的同時(shí)降低了整車地重量，說明了統(tǒng)計(jì)能量方法對整車高頻降噪方面的可行性。
[Abstract]:With the rapid development of the automobile industry and the continuous improvement of people's living standard, the automobile has changed from the luxury goods to the necessities of people's life. There are also higher requirements for vehicle noise, vibration and comfort, that is, NVH performance. Therefore, all countries spend a lot of effort on the research of automobile NVH. There are many ways to solve this kind of NVH problem, among which statistical energy analysis (SEA) is one of the most important methods. The main method to reduce the noise in the vehicle is to reduce the noise source and improve the isolation ability of the noise transmission path. In this paper, through an example and analysis of the corresponding test data, some methods for noise control in vehicles are expounded, and the noise testing methods and some indexes widely used in automobile industry are introduced in this paper. Firstly, the original state of the whole vehicle is tested and the sealing performance of the whole vehicle is improved. At the same time, the form information of the vehicle subsystem is collected, and then the SEA model of the vehicle is established to predict the indoor noise. Secondly, after getting some preliminary test results and SEA model above, the acoustic package of the whole vehicle is optimized. According to the optimized design results, the materials are prepared and tested on the vehicle. Through the actual test results, the acoustic package design is further optimized to achieve the initial design goal. The test position in the car is at the right ear of the driver. From the test results, the calculated results of sea play a guiding role in the noise reduction of the whole vehicle at high frequency, and save time and cost. The unexpected gain is to improve the NVH performance of the whole vehicle and reduce the weight of the whole vehicle at the same time. The feasibility of the statistical energy method for the high frequency noise reduction of the whole vehicle is illustrated.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：U461.4;TB535

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