【摘要】：液壓挖掘機是現(xiàn)代工程建設中常用的主要工程機械裝備之一,在國民經(jīng)濟建設中占有著重要地位。工作裝置是液壓挖掘機動作的主要執(zhí)行機構,在液壓挖掘機作業(yè)過程中,工作裝置由于直接受到各種復雜載荷的作用,且作業(yè)環(huán)境嚴酷惡劣,因此對工作裝置結(jié)構設計的合理性、操作的方便性、使用的耐久性以及可靠性提出了更高的要求,同時它也直接影響著液壓挖掘機的工作特性和使用壽命。液壓挖掘機工作裝置的強度和疲勞壽命滿足工作環(huán)境要求是其結(jié)構設計是否合理的關鍵要素。本文從某一型號液壓挖掘機作業(yè)過程中工作裝置所處實際作業(yè)環(huán)境出發(fā),建立了極端狀態(tài)下液壓挖掘機工作裝置的受力分析模型,并對鏟斗、斗桿以及動臂及整體工作裝置的受力狀況進行了理論計算,得到了工作裝置工作狀態(tài)下的極端載荷;運用ANSYS軟件中APDL參數(shù)化語言,建立了液壓挖掘機工作裝置的三維實體模型,并針對極端載荷下工作裝置應力與應變分布情況仿真模擬。通過理論分析以及模擬仿真,找出了工作裝置結(jié)構強度的薄弱之處,并進行了結(jié)構優(yōu)化設計;針對工作裝置的危險點和危險區(qū)域的應力,對工作裝置的疲勞壽命進行了仿真分析,仿真結(jié)果表明優(yōu)化后的液壓挖掘機工作裝置的結(jié)構設計是滿足工作要求的。研究成果已應用于實際型號的液壓挖掘機工作裝置的設計生產(chǎn)中,且表明可為液壓挖掘機工作裝置的設計提供重要的指導。
[Abstract]:Hydraulic excavator is one of the main construction machinery equipment commonly used in modern engineering construction and plays an important role in the national economic construction. The working device is the main executing mechanism of hydraulic excavator action. In the process of hydraulic excavator operation, the working device is directly affected by various complex loads, and the working environment is harsh. Therefore, the rationality of the structure design of the working device, the convenience of operation, the durability and reliability of the hydraulic excavator are put forward. At the same time, it has a direct impact on the working characteristics and service life of the hydraulic excavator. The strength and fatigue life of hydraulic excavator working device meet the requirements of working environment. Starting from the actual working environment of a certain type of hydraulic excavator in the working process, this paper sets up an analysis model of the working device of the hydraulic excavator under extreme conditions, and makes a bucket analysis. The mechanical condition of the bucket rod, the moving arm and the whole working device is calculated theoretically, and the extreme load under the working state of the working device is obtained. Using APDL parameterized language in ANSYS software, the three-dimensional solid model of hydraulic excavator working device is established, and the stress and strain distribution of the working device under extreme load is simulated. Through theoretical analysis and simulation, the weakness of the structural strength of the working device is found, and the structural optimization design is carried out. The fatigue life of the working device is simulated and analyzed in view of the dangerous point and the stress in the dangerous area. The simulation results show that the optimized structure design of the working device of the hydraulic excavator can meet the requirements of the work. The research results have been applied to the design and production of the working device of the actual hydraulic excavator, and it is indicated that it can provide important guidance for the design of the working device of the hydraulic excavator.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU621

【參考文獻】

相關期刊論文 前9條

1 史青錄;張福生;連晉毅;;挖掘機動臂強度對比分析[J];工程機械;2009年07期

2 劉韜;胡軍科;謝平;;液壓挖掘機工作裝置結(jié)構的優(yōu)化設計[J];建設機械技術與管理;2010年11期

3 杜子學;王星;;貨車后橋殼的疲勞強度分析[J];交通標準化;2008年10期

4 張國文;郭維昭;;基于UG裝載機構件建模及疲勞壽命分析[J];制造業(yè)自動化;2010年07期

5 劉剛強;蔣炎坤;李宗;張宏;張建平;;挖掘機工作裝置整體有限元分析與試驗研究[J];機械科學與技術;2011年07期

6 李丹;周志鴻;劉瑞華;;基于ANSYS液壓挖掘機動臂的有限元分析[J];建筑機械;2008年17期

7 趙曉鵬;姜丁;張強;朱先民;;雨流計數(shù)法在整車載荷譜分析中的應用[J];科技導報;2009年03期

8 郭耀松;張新忠;張大偉;;起重機吊臂結(jié)構的有限元分析[J];農(nóng)業(yè)裝備與車輛工程;2009年07期

9 郭立新,王守春,鄭春歧,張國忠;液壓反鏟挖掘機工作裝置有限元動態(tài)分析[J];中國機械工程;2000年12期

相關碩士學位論文 前1條

1 鄭東京;挖掘機工作裝置的有限元分析及其仿真[D];西北農(nóng)林科技大學;2011年

，

本文編號：2377032