【摘要】：本文在校企合作項目“XXX型號非公路寬體礦用自卸車車架斷裂失效分析及結(jié)構(gòu)改進設(shè)計”基礎(chǔ)上，對于非公路寬體礦用自卸車車架失效分析及結(jié)構(gòu)改進展開研究。非公路寬體礦用自卸車是目前小型礦山運輸?shù)闹饕O(shè)備，它自身體積大，載重量大，工作環(huán)境惡劣，多工作于路況很差的礦山礦區(qū)，使用條件復(fù)雜多變。特殊的工作條件使得自卸車所受到的動態(tài)載荷的變化大，當(dāng)重載行駛在坡多彎多側(cè)傾坡多的顛簸路面時，受到來自路面的沖擊載荷和隨機載荷對整車結(jié)構(gòu)是一個非常大的挑戰(zhàn)。本文中的礦用自卸車整車空載質(zhì)量21噸，設(shè)計最大載重量80噸，空車行駛速度30km/h，載貨正常行駛速度10km/h。每天使用超過20小時，在使用3～5個月后，行駛不足5萬公里，大量車架出現(xiàn)了裂紋，嚴重影響了工作效率及工作質(zhì)量，使企業(yè)承受了巨大的經(jīng)濟損失。為了找出車架斷裂的原因，同時提出結(jié)構(gòu)改進設(shè)計方案，本文圍繞非公路寬體礦用自卸車車架的剛度強度展開研究，結(jié)合了有限元靜態(tài)線性分析、多體動力學(xué)動態(tài)應(yīng)力分析、整車的靜動態(tài)測試和疲勞壽命預(yù)測分析，最終形成了一套完整的針對非公路寬體礦用自卸車車架斷裂失效的分析研究體系，對今后的工程實踐提供參考依據(jù)。全文共分為七部分： 第一章為緒論，介紹了非公路寬體礦用自卸車的研究背景和研究意義，詳細描述了非公路寬體礦用自卸車的結(jié)構(gòu)組成以及發(fā)展現(xiàn)狀和趨勢，通過對國內(nèi)外研究學(xué)者對非公路寬體礦用自卸車的相關(guān)研究，以及針對非公路寬體礦用自卸車車架失效等問題的研究分析對比之后，提出了本文的研究方向和內(nèi)容。 第二章對車架和懸架的剛度匹配技術(shù)進行研究。由于車架所受的載荷主要是由懸架傳遞的，懸架作為與車架相連的重要傳力部件，它的剛度直接影響了車架的剛度，對前后懸架間的剛度匹配以及車架與懸架的剛度匹配進行了計算。 第三章是對車架失效問題的線性有限元靜態(tài)分析。結(jié)合Pro/E—HyperMesh—ANSYS建立有限元模型，并采用適當(dāng)?shù)膯卧愋湍M各種結(jié)構(gòu)和邊界條件，選擇典型工況對失效車架的有限元分析，結(jié)合應(yīng)力強度因子理論和應(yīng)力集中系數(shù)理論，找到車架失效的原因和位置，并提出合理化的改進方案，同時對車架改進前后的有限元靜態(tài)分析和模態(tài)分析進行了對比分析。 第四章是基于多體動力學(xué)的車架仿真分析及動態(tài)應(yīng)力研究。本章結(jié)合多體動力學(xué)理論，建立非公路寬體礦用自卸車整車虛擬樣機模型，仿真分析了兩種典型的路面工況，為以后的疲勞壽命預(yù)測分析做準(zhǔn)備，即提取車架載荷傳遞點的載荷譜。 第五章為整車關(guān)鍵技術(shù)的測試驗證。在上文中對非公路寬體礦用自卸車車架進行有限元靜態(tài)分析和多體動力學(xué)動態(tài)應(yīng)力計算后，為了驗證這兩次計算的合理性，需要對車架進行測試驗證。通過對比分析，，有限元靜態(tài)分析結(jié)果與靜態(tài)測試結(jié)果基本一致，多體動力學(xué)仿真結(jié)果曲線與在標(biāo)準(zhǔn)試驗場地的測試曲線大體吻合，說明有限元分析和多體動力學(xué)仿真和合理性。通過對礦區(qū)場地的動態(tài)測試，找到靜動態(tài)測試的應(yīng)力映射系數(shù)，繼而推出原失效車架的動態(tài)數(shù)據(jù)。 第六章對車架結(jié)構(gòu)的疲勞壽命進行了預(yù)測分析。利用上文中基于ADAMS/VIEW多體動力學(xué)仿真分析，提取車架載荷傳入點的載荷譜，通過動態(tài)載荷模擬的方法，計算出車架載荷隨時間的變化歷程，利用ncode疲勞壽命分析軟件對車架疲勞壽命進行了評估。 第七章對全文的內(nèi)容進行了總結(jié)，同時對今后的研究提出了幾點展望。 本文主要有以下三點創(chuàng)新點： （1）建立了剛?cè)狁詈系能嚰苣Ｐ�，并建立了整車的虛擬樣機仿真模型，結(jié)合實際工作路面情況創(chuàng)建模擬路面，進行了多體動力學(xué)仿真分析，通過測試驗證仿真結(jié)果的準(zhǔn)確性，為工程實際應(yīng)用提供一種可靠的虛擬樣機仿真分析方法。 （2）對非公路寬體礦用自卸車車架及相關(guān)部件進行了典型工況的靜動態(tài)測試，并與CAE仿真分析方法進行了對比驗證，本次的靜動態(tài)測試是一套比較完整和大型的測試過程，對今后的相關(guān)測試及工程應(yīng)用提供參考。 （3）提取動力學(xué)仿真分析得到的載荷時間歷程曲線，作為疲勞計算的載荷譜輸入，得出原失效結(jié)構(gòu)的疲勞壽命符合實際斷裂時間，并可用于改進后車架的疲勞壽命預(yù)測，這一工作對工程車輛的研究具有參考意義。
[Abstract]:On the basis of the "The Analysis of the Failure and the Design of the Structure of the Frame of the Mining Dump Truck with XXX Model of Non-Highway and Wide Body" of the cooperative project of the school-enterprise, this paper studies the failure analysis and the structure improvement of the frame of the non-highway wide-body mining dump truck. The non-highway wide-body mining dump truck is the main equipment for the small-scale mine transportation at present, its own volume is large, the weight is large, the working environment is bad, and the mining area with poor road condition is more and more complicated and changeable. The special working conditions cause the dynamic load of the dump truck to be large, and when the heavy load runs on the multi-curved and multi-side slope road, the impact load and the random load from the road surface are a very big challenge to the whole vehicle structure. The no-load mass of the mining dump truck in this paper is 21 tons, the design maximum load capacity is 80 tons, the running speed of the empty vehicle is 30 km/ h, and the normal running speed of the cargo truck is 10 km/ h. The use of more than 20 hours a day, after 3-5 months of use, the driving is less than 50,000 km, and a large number of frames have cracks, which seriously affect the work efficiency and the work quality, so that the enterprise can bear huge economic losses. In order to find out the reason of the frame fracture, and to put forward the structural improvement design scheme, this paper studies the stiffness of the frame of the non-highway wide-body mining dump truck, and combines the static linear analysis of the finite element and the dynamic stress analysis of the multi-body dynamics. The static dynamic test and the fatigue life prediction analysis of the whole vehicle finally form a complete analysis and research system for the failure of the frame of the non-highway wide-body mining dump truck, and provide the reference basis for future engineering practice. The full text is divided into seven parts: The first chapter is the introduction, the research background and significance of the non-highway wide-body mining dump truck are introduced, the structure composition and the trend of the development of the non-highway wide-body mining dump truck are described in detail. In this paper, the research direction and interior of this paper are put forward through the research on the relevant research of the non-highway wide-body mining dump truck and the research and analysis of the failure of the non-highway wide-body mining dump truck. The second chapter introduces the rigidity matching technology of the frame and the suspension. The stiffness of the frame is directly affected by the rigidity of the frame, the rigidity matching between the front and rear suspensions, and the rigidity matching of the frame and the suspension. The third chapter is the linear finite element of the frame failure problem The finite element model is established by using the Pro/ E-HyperMesh and ANSYS, and various structures and boundary conditions are simulated by using the appropriate unit type. The finite element analysis of the failure frame under typical working conditions is selected, and the failure of the frame is found by combining the stress intensity factor theory and the stress concentration coefficient theory. Reason and location, and put forward a reasonable improvement scheme, at the same time, the finite element static analysis and the modal analysis before and after the improvement of the frame are carried out The fourth chapter is the frame simulation analysis based on multi-body dynamics Based on the multi-body dynamics theory, the vehicle virtual prototype model of the non-highway wide-body mining dump truck is established, and the two typical road conditions are analyzed, and the future fatigue life prediction analysis is prepared, that is, the frame load is extracted. The load spectrum of the transfer point. The fifth chapter is the whole vehicle The test and verification of the key technologies are as follows: after the finite element static analysis and the multi-body dynamic stress calculation of the non-highway wide-body mining dump truck frame, in order to verify the rationality of the two calculations, it is necessary to The test and verification of the frame are carried out. The results of the static analysis of the finite element are basically the same as the static test results. The results of the multi-body dynamics simulation are in general agreement with the test curves at the standard test site, and the finite element analysis and the multi-body analysis are described. Dynamic simulation and rationality. Through the dynamic test of the site of the mining area, the stress mapping coefficient of the static dynamic test is found, and then the original Dynamic data of a failed frame. Chapter 6: Structure of the frame The fatigue life is predicted and analyzed. Based on the multi-body dynamics simulation analysis of ADAMS/ VIEW, the load spectrum of the load transfer point of the frame is extracted, the change course of the frame load over time is calculated by the method of dynamic load simulation, and the software is analyzed by using the ncode fatigue life analysis software. The fatigue life of the frame is evaluated. Chapter 7 summarizes the contents of the full text and at the same time Some prospects for future research are put forward. This paper mainly has the following three points of innovation: (1) The frame model of rigid-flexible coupling is set up, and the virtual prototype simulation model of the whole vehicle is established. The multi-body dynamics simulation analysis is carried out on the simulated road surface, and the accuracy of the simulation results is verified by the test, so that the practical application of the project A reliable virtual prototype simulation analysis method is provided. (2) The static and dynamic test of a typical working condition of a non-highway wide-body mining dump truck frame and related components is carried out, and compared with the CAE simulation analysis method, the static dynamic test is carried out, Dynamic testing is a relatively complete and large test (3) the load time history curve obtained by the dynamic simulation analysis is taken as the load spectrum input of the fatigue calculation to obtain the actual fatigue life of the original failure structure. Fracture time and can be used to improve the fatigue life of the rear frame
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TD562.1

【參考文獻】

相關(guān)期刊論文 前10條

1 王錄山;王國權(quán);張紅松;王麗榮;;重載自卸車車架強度的有限元分析[J];北京信息科技大學(xué)學(xué)報(自然科學(xué)版);2010年02期

2 王軍;馬若丁;王繼新;楊芙蓉;閆振華;;礦用自卸車車架強度有限元分析[J];工程機械;2008年11期

3 馬肇基,原拽龍;BJZ3364型自卸車車架開裂的原因分析[J];工程機械與維修;2003年05期

4 黃興全;;重型載重汽車車架的設(shè)計淺析[J];裝備制造技術(shù);2009年07期

5 陳樹勛;陳建軍;陳偉光;;某礦用車多種工況下的結(jié)構(gòu)分析與優(yōu)化設(shè)計[J];裝備制造技術(shù);2010年02期

6 沈煒良;邊立靜;伍建華;;重型載貨汽車車架的結(jié)構(gòu)分析及優(yōu)化設(shè)計[J];廣西大學(xué)學(xué)報(自然科學(xué)版);2007年03期

7 羅禮培;張祖同;樊啟才;李瑋;龔改民;朱紅文;;非公路寬體自卸車市場研究及前景分析[J];工程機械文摘;2012年03期

8 成凱;劉維維;廖清德;鄭森;郝慶升;;基于ADAMS的礦用自卸車車架動態(tài)應(yīng)力分析[J];中國工程機械學(xué)報;2014年02期

9 于長吉,王平一;礦用重型汽車車架斷裂研究[J];大連工學(xué)院學(xué)報;1984年01期

10 董志明;丁浩然;;自卸車工況分析及典型工況下車架應(yīng)力計算[J];機械工程師;2009年09期

相關(guān)博士學(xué)位論文 前3條

1 郝赫;多軸重型汽車剛彈耦合虛擬樣機分析與匹配[D];吉林大學(xué);2011年

2 李飛;轎車轉(zhuǎn)向節(jié)耐久性壽命預(yù)測研究[D];吉林大學(xué);2010年

3 劉偉;客車懸架橡膠襯套對整車性能影響研究與多目標(biāo)優(yōu)化[D];吉林大學(xué);2012年

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