【正文】 e in order to decrease the cost of the design. When it es to the design regarding the ride fort, the shock model of the vehicle with 5 DOF is built for doing the shock analysis concerning these such as tires, body and seat of the vehicle, to do so can show the high capability in the attenuation shock of the suspension system. Therefore, this project of the suspension system possesses a good ride fort. Key words： Independent suspension； automobile shock absorber ； guide mechnism； ride fort 本科生畢業(yè)設(shè)計(jì)（說明書） III 目 錄 第一章 緒 論 ............................................................................................................ 1 第二章前、后懸架結(jié)構(gòu)的選擇 ................................................................................ 4 獨(dú)立懸架結(jié)構(gòu)特點(diǎn) ..................................................................................... 4 獨(dú)立懸架結(jié)構(gòu)形式及評價(jià)指標(biāo)分析 ......................................................... 4 前、后懸架結(jié)構(gòu)方案 ................................................................................. 4 輔助元件 ..................................................................................................... 6 橫向穩(wěn)定器 ...................................................................................... 6 緩沖塊 .............................................................................................. 7 第三章技術(shù)參數(shù)確定與計(jì)算 .................................................................................... 8 自振頻率 ..................................................................................................... 8 懸架剛度 KSU ............................................................................................. 8 懸架靜撓度 ................................................................................................. 9 懸架動撓度 ............................................................................................... 10 第四章彈性元件的設(shè)計(jì)計(jì)算 ...................................................................................11 前懸架彈簧（麥弗遜懸架） ....................................................................11 彈簧中徑、鋼絲直徑、及結(jié)構(gòu)形式 .............................................11 彈簧圈數(shù) ........................................................................................ 12 后懸架彈簧（雙叉骨懸架） ................................................................... 12 彈簧中徑、鋼絲直徑、及結(jié)構(gòu)形式 ............................................ 12 彈簧圈數(shù) ........................................................................................ 13 第 5 章 懸架導(dǎo)向機(jī)構(gòu)的設(shè)計(jì) ................................................................................ 14 導(dǎo)向機(jī)構(gòu)設(shè)計(jì)要求 ................................................................................... 14 麥弗遜獨(dú)立懸架示意圖 ........................................................................... 14 雙叉骨獨(dú)立架示意圖 ............................................................................... 15 導(dǎo)向機(jī)構(gòu)受力分析 ................................................................................... 15 導(dǎo)向機(jī)構(gòu)的布置參數(shù) ............................................................................... 16 側(cè)傾中心 ....................................................................................... 16 第 6 章 減振器設(shè)計(jì) ................................................................................................ 18 減振器概述 ............................................................................................... 18 減振器分類 ............................................................................................... 18 減振器主要性能參數(shù) ............................................................................... 19 相對阻尼系數(shù) ψ ............................................................................ 19 本科生畢業(yè)設(shè)計(jì)（說明書） IV 減振器阻尼系數(shù) δ ......................................................................... 20 最大卸荷力 F0 .......................................................................................... 21 筒式減振器主要尺寸 ............................................................................... 21 筒式減振器工作直徑 D ................................................................ 21 油筒直徑 Dc .................................................................................. 22 第 7 章 橫向穩(wěn)定桿設(shè)計(jì) ...................................................................................... 23 第 8 章 平順性分析 .............................................................................................. 25 平順性概念 ............................................................................................... 25 汽車的等效振動分析 ............................................................................... 25 車身加速度的幅頻特性 ........................................................................... 28 相對動載，對的幅頻特性 ....................................................................... 28 車身振動相應(yīng)均方根值 ........................................................................... 28 影響平順性的因素 ................................................................................... 29 第 9 章 結(jié) 論 .......................................................................................................... 31 參考文獻(xiàn) .................................................................................................................. 32 致 謝 ........................................................................................................................ 33 附 錄 Ⅰ .................................................................................................................... 34 附錄 Ⅱ .................................................................................................................. 39 本科生畢業(yè)設(shè)計(jì)（說明書） 1 第一章 緒 論 懸架系統(tǒng)概述 懸架是汽車的車架與車橋或車輪之間的一切傳力連接裝置的總稱，其作用是傳遞作用在車輪和車架之間的力和力扭，并且緩沖由不平路面?zhèn)鹘o車架或車身的沖擊力，并衰減由此引起的震動，以保證汽車能平順地行駛。 采用 CAXA 軟件分別繪制前后懸架的裝配圖和部分零件圖。還進(jìn)行了懸架參數(shù)的確定。 本科生畢業(yè)設(shè)計(jì)（說明書） I 摘 要 隨著汽車工業(yè)的發(fā)展，人們對汽車的乘坐舒適性和安全性的要求逐漸提高，因此對汽車的懸架系統(tǒng)和減振器也提出了更高的要求。前、后懸架的減振器均采用雙作用液力減振器。采用 MATLAB 軟件對懸架系