本文選題：液壓支架　切入點：有限元分析　出處：《山東科技大學》2017年碩士論文　論文類型：學位論文

【摘要】：液壓支架是綜采工作面不可或缺的配套設備,由于其受力復雜,傳統(tǒng)的樣機試驗受測點數(shù)目與加工質量的影響,難以全面反映液壓支架的應力分布情況,因此針對液壓支架整架及主要承載結構件進行有限元分析十分必要。針對液壓支架的輕量化研究是在結構層面對支架做適當優(yōu)化,使用降低鋼材用量的方法達到減重的目的,同時在保證支架安全使用的前提下,最大限度地增強其支撐功能。輕量化設計一方面能夠提高支架運輸效率,另一方面也能減少制造成本,在競爭日益激烈的煤機市場增強產(chǎn)品競爭力。本課題完成了 8.2米大采高液壓支架的設計以及主要承載結構件的建模,在PRO/E中完成了整架裝配和干涉檢驗,基于PRO/E和Adams完成了支架的運動仿真,仿真結果驗證了支架設計建模的準確性。使用有限元軟件ANSYS workbench對液壓支架進行網(wǎng)格劃分,設置完材料參數(shù)與邊界條件后對支架做強度分析。液壓支架5種最危險工況下的受力情況分別為頂梁兩端加載、頂梁偏心加載、底座兩端加載、底座扭轉加載、頂梁扭轉加載與底座兩端同時加載。對支架的有限元分析可以確定其在5種最危險工況下的受力情況,為支架的輕量化研究提供了數(shù)據(jù)支撐�；诮Y構優(yōu)化中的拓撲優(yōu)化對液壓支架頂梁和掩護梁進行輕量化設計,找出最佳材料布置方案,在液壓支架能夠滿足不同工況下使用強度要求的前提下通過材料選擇減輕重量,拓撲優(yōu)化后液壓支架的質量減輕了1.59%,在拓撲優(yōu)化的基礎上對液壓支架的承載構件頂梁、掩護梁、前連桿、后連桿、底座使用ANSYS workbench軟件進行尺寸優(yōu)化,使得液壓支架在最危險的使用工況下仍然能夠正常使用同時盡可能地減輕液壓支架重量,進而達到節(jié)省材料和減少制造成本的目的,尺寸優(yōu)化后液壓支架重量較優(yōu)化前減輕1.9%。經(jīng)過拓撲優(yōu)化和尺寸優(yōu)化后,液壓支架質量總共減少了 1737kg,相比優(yōu)化前質量減輕了 3.46%。對8.2米大采高液壓支架的分析和優(yōu)化結果表明針對液壓支架的有限元分析與輕量化研究方法能夠彌補液壓支架傳統(tǒng)研發(fā)手段的諸多不足,能夠為今后液壓支架的研發(fā)、制造及結構改進提供參考。
[Abstract]:Hydraulic support is an indispensable supporting equipment in fully mechanized mining face. Because of its complex force, the traditional prototype test is affected by the number of measuring points and processing quality, so it is difficult to fully reflect the stress distribution of hydraulic support. Therefore, it is very necessary to analyze the whole frame of the hydraulic support and the main bearing structure parts by finite element method. The lightweight research on the hydraulic support is to optimize the support properly at the structural level and to reduce the steel content to achieve the purpose of weight reduction. At the same time, under the premise of ensuring the safe use of the support, the support function can be maximized. Lightweight design can improve the transport efficiency of the support, on the other hand, it can also reduce the manufacturing cost. In the increasingly competitive coal machine market to enhance the competitiveness of products. This project has completed the design of 8.2-meter mining height hydraulic support and the modeling of main load-bearing structural parts, and has completed the whole assembly and interference inspection in PRO/E. Based on PRO/E and Adams, the movement simulation of the support is completed, and the simulation results verify the accuracy of the support design modeling. The finite element software ANSYS workbench is used to mesh the hydraulic support. After setting the material parameters and boundary conditions, the strength of the support is analyzed. The stress conditions of the hydraulic support under the five most dangerous conditions are: the top beam loading at both ends, the top beam eccentric loading, the base end loading, the base torsion loading, The torsional load of the top beam is loaded at the same time as the two ends of the base. The finite element analysis of the support can determine its stress under the five most dangerous conditions. Based on the topology optimization in structural optimization, the top beam and cover beam of hydraulic support are designed lightweight, and the best material layout scheme is found out. On the premise that the hydraulic support can meet the requirements of strength under different working conditions, the weight can be reduced by material selection, and the quality of the hydraulic support after topology optimization is reduced by 1.59. On the basis of topology optimization, the top beam and cover beam of the bearing member of the hydraulic support are optimized. The front connecting rod, rear connecting rod and base are optimized by ANSYS workbench software, so that the hydraulic support can still be used normally under the most dangerous working conditions and the weight of the hydraulic support can be reduced as much as possible. In order to save material and reduce manufacturing cost, the weight of hydraulic support after dimension optimization is 1.9 less than that before optimization. After topology optimization and dimension optimization, The mass of hydraulic support has been reduced by 1737 kg, which is 3.46% less than that before optimization. The analysis and optimization results of 8.2 meters high mining hydraulic support show that the finite element analysis and lightweight research method for hydraulic support can make up for the fluid. The shortcomings of the traditional research and development methods of the pressure bracket, It can provide reference for future research and development, manufacture and structure improvement of hydraulic support.
【學位授予單位】：山東科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD355.4

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