本文選題：盤式制動器 + 制動噪聲�。� 參考：《華南理工大學》2009年碩士論文

【摘要】： 廣汽自主品牌乘用車車型定位和主要使用功能:本項目旨在開發(fā)一款兼顧家庭、公務等用途的中高級三廂式轎車,同時形成可供同級別拓展車型共享的底盤平臺,該平臺還可為跨級別拓展車型提供共享“架構”。首款產品為基于A6平臺的五座三廂式轎車,適用于我國大部分地區(qū)的道路條件和氣候條件。該車型應滿足國家產品定型標準及其它強制性法規(guī),并考慮歐美法規(guī)和標準。 根據(jù)廣汽自主品牌乘用車AC車型整車開發(fā)計劃,AC車型制動系統(tǒng)在參考菲亞特A166轎車底盤制造平臺的基礎上進行開發(fā)設計。以選配2.0 TS發(fā)動機為基礎。 AC車型的行車制動系統(tǒng)采用液壓制動系統(tǒng)。前、后制動器分別為前通風盤式制動器和實心盤式制動器,制動踏板為吊掛式踏板,帶真空助力器,制動管路為雙回路對角線(X型)布置,采用ABS。駐車制動系統(tǒng)為機械式手動后盤式制動,采用遠距離棘輪拉索操縱機構。因AC車型與參考樣車菲亞特A166的整車參數(shù)接近,制動系統(tǒng)在A166基礎上進行開發(fā)設計。AC車型的制動系統(tǒng)設計要符合GB 12676-1999《汽車制動系統(tǒng)結構、性能和試驗方法》;GB 13594-2003《機動車和掛車防抱制動性能和試驗方法》和GB 7258-2004《機動車運行安全技術條件》的要求,其中的踏板力要求≤500N,駐車制動停駐角度為20%(12),駐車制動操縱手柄力≤400N。 對于一切行駛車輛來說,制動性能都是至關重要的,如果制動器設計不合理,摩擦材料老化或制動工況發(fā)生變化,制動時就可能引起強烈的振動,并伴隨著噪聲。產生制動噪聲的因素很多,除去與摩擦片的組分和本身固有特性有關外,與制動器的主要組成部件—制動盤、制動鉗體、背板等部件的特性也有關系,降低制動噪聲應將整個制動器作為一個系統(tǒng)考慮。 針對廣汽AC轎車盤式制動器的制動尖叫問題,利用理論計算與實驗相結合的方法,進行振動噪聲測試,獲得了制動器及其主要部件的振動信號和噪聲信號;建立了制動器有限元分析模型,并利用模態(tài)實驗對有限元模型進行了修正,確保了計算的準確性;將實驗結果與理論計算結果進行比較,研究了制動噪聲頻率與制動器主要部件固有頻率之間的關系,從而對制動器噪聲問題進行探討和研究。該方法同傳統(tǒng)單一的實驗方法相比,計算結果更為準確,有助于結構設計更加合理。全文主要從以下幾個方面進行了闡述: 首先簡單介紹了制動噪聲和振動的基本理論、研究現(xiàn)狀和發(fā)展趨勢。 然后通過臺架實驗,測試了各種制動工況下制動器的噪聲信號和主要部件的振動信號;根據(jù)相關的分析理論和分析手段對該盤式制動器制動噪聲進行了相應的頻譜分析和相干分析,研究了相關部件振動信號與噪聲信號之間的因果關系。以三維軟件CATIA為平臺,創(chuàng)建了該盤式制動器的三維實體模型。在分析軟件MSC PATRAN/NASTRAN環(huán)境下,對該制動器模型進行了有限元分析,初步獲得了各部件的固有頻率和振型圖。對主要部件進行了模態(tài)實驗,獲得了各部件的固有特性,并根據(jù)所測結果對有限元模型進行了檢驗和修正。最后,建立了較準確的制動器總成有限元模型,獲得了固有頻率和振型圖。將頻譜分析的結果與有限元計算的結果進行分析對比后發(fā)現(xiàn),制動過程中的共振是該制動器產生制動噪聲的主要原因。為進一步對制動器進行優(yōu)化設計并最終降低制動噪聲提供了依據(jù)。
[Abstract]:The purpose of this project is to develop a middle and high grade three van with both family and public service, and to form a chassis platform for the sharing of the same level model. The platform can also provide a shared "architecture" for the cross level development model. The first product is based on the A6 platform. The five three van sedan is applicable to the road conditions and climate conditions in most areas of our country. The model should meet the national product setting standards and other mandatory regulations, and consider the European and American regulations and standards.
According to the development plan of the AC vehicle, the AC vehicle brake system is designed on the basis of the Fiat A166 car chassis manufacturing platform, which is based on the selection of 2 TS engine.
The brake system of the AC vehicle adopts the hydraulic brake system. The former is the front ventilation disc brake and the solid disc brake, the brake pedal is hanging type pedal, the vacuum booster is carried, the brake line is double circuit diagonal (X type), and the ABS. parking brake system is the mechanical manual rear disc brake and the distance is used. The design of the brake system for the development design of the.AC model on the basis of A166 is consistent with the vehicle parameters of the AC model and the reference model Fiat A166. The design of the brake system for the design of the.AC model on the basis of A166 should conform to the structure of the GB 12676-1999< brake system, the performance and the test method >; GB 13594-2003 < the anti lock braking performance of the motor vehicle and the trailer and the test side. The requirements for the safety technical conditions of motor vehicle operation in law > and GB 7258-2004<, the pedal force requirement is less than 500N, the parking brake parking angle is 20% (12), and the force of the control handle of the parking brake is less than 400N.
For all driving vehicles, braking performance is very important. If the brake design is not reasonable, the friction material aging or the braking condition changes, the brake may cause strong vibration and the noise. There are many factors to produce the brake noise, which is related to the composition of the friction plate and its inherent characteristics. The main components of the actuator, the brake disc, the brake clamp body, the back plate and other components, are also related. The whole brake should be considered as a system to reduce the braking noise.
In view of the screaming problem of the disc brake of AC car of Guang Qi, the vibration and noise signals of the brake and its main components are obtained by combining the theoretical calculation with the experiment. The finite element analysis model of the brake is established and the finite element model is corrected by using the modal experiment. By comparing the experimental results with the theoretical results, the relationship between the frequency of the brake noise and the natural frequency of the main brake components is studied, and the noise of the brake is discussed and studied. The method is more accurate than the traditional single experimental method and is helpful to the design of the structure. The full text mainly elaborates from the following aspects:
Firstly, the basic theory, research status and development trend of brake noise and vibration are briefly introduced.
Then through the bench test, the noise signal of brake and the vibration signal of the main components are tested under various braking conditions. According to the related analysis theory and analysis methods, the corresponding spectrum analysis and coherent analysis are carried out on the brake noise of the disc brake, and the causality between the vibration signal and the noise signal of the related parts is studied. A three-dimensional solid model of the disc brake is created on the platform of 3D software CATIA. Under the environment of MSC PATRAN/NASTRAN analysis software, the finite element analysis of the brake model is carried out, and the natural frequencies and vibration patterns of the components are obtained. The modal experiments of the main components are carried out, and the inherent characteristics of the components are obtained. The finite element model is tested and corrected according to the measured results. Finally, a more accurate finite element model of the brake assembly is established, and the natural frequency and vibration pattern are obtained. The analysis and comparison of the results of the spectrum analysis and the results of the finite element analysis show that the resonance in the braking process is the main brake noise. It provides a basis for further optimizing the brake design and ultimately reducing brake noise.

【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2009
【分類號】：U463.5

【引證文獻】

相關碩士學位論文 前1條

1 梁文英;基于整車匹配的盤式制動器參數(shù)化設計與優(yōu)化[D];武漢理工大學;2012年

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本文編號：1829065