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整体顶梁组合滑移液压支架有限元分析
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摘要
本文在综述国内外液压支架研究现状和发展趋势的基础上,针对国内外将研究重心放在重型、高强、智能方面而忽略了量大面广的轻型液压支架的研究这一问题,提出了研究滑移液压支架的必要性。针对滑移液压支架易出现的头重脚轻,挤架、倒架问题,提出了研究整体顶梁组合滑移液压支架的必要性。
     本文所采用的支架研发流程如下:图纸设计→理论强度校核→建立虚拟样机→有限元分析→设计修改→再次有限元分析→物理样机试验,相较于传统的研发流程:图纸设计→理论强度校核→物理样机试验→设计修改→再次物理样机试验,这种研发流程提高了支架一次性设计成功率,提高了产品质量,缩短了设计周期,节约了设计成本。
     以ZH1600/16/24Z(A)型整体顶梁组合滑移液压支架为例,在图纸设计、理论强度校核的基础上,重点利用有限元技术对支架顶梁和立柱强度进行分析。
     利用材料力学的方法对顶梁和立柱进行理论强度校核,在校核符合设计要求的基础上,利用有限元技术对支架在不同工况下的强度进行分析。利用CATIA软件建立ZH1600/16/24Z(A)型整体顶梁组合滑移液压支架的虚拟样机模型,并对其进行干涉检查;利用HyperMesh软件对三维模型进行几何清理并划分网格;在ABAQUS中定义材料属性、边界条件并施加载荷,得到不同工况下顶梁的应力云图和位移云图,得到顶梁易受破坏的部位,为支架的设计和分析提供理论参考。对立柱进行有限元强度分析及虚拟强度型式试验,结合理论强度校核结果得知立柱设计过于保守,提出相应改进方案,并对改进后的立柱再次进行有限元分析和虚拟强度型式试验,试验结果表明改进后的设计方案可行。
     虚拟样机技术和有限元技术应用于液压支架的研究是一项复杂的、长期的工作,本文在这方面的研究也仅仅是初级的探索性的研究。
The paper is based on the research current situation and development trend of hydraulicsupport ,aiming at the problems that the research focus is heavy,high-strength and intelligenthydraulic support at home and abroad,but ignoreing the light support which has a largecapacity and a wide range ,we put forward the necessity of researching slid ing hydraulicsupport.Aiming at slid ing hydraulic support's top-heavy and easy to crowd and fall ,we putforward the necessity of researching the whole top beam combination slid ing hydraulicsupport.
     The research process as following: drawing design→theoretica l strengthchecking→build ing virtual prototyping→finite element analysis→modifying thedesign→finite element analysis again→physica l prototype test.The research process canimprove the success rate of one-time design, improve products quality, shorten the designcycle and save the design cost.
     Taking type ZH1600/16/24Z(A) the whole top beam combination slid ing hydraulicsupport designed by PuBai SanTong coMPany in ShanXi province for example.On the basisof drawing design and theoretica l strength checking, to put emphasis on analyzing the strengthof top beam and column making use of finite element technology.
     Making use of mechanics of materia ls' knowledge to check the strength of top beam andcolumn,a nd then to analyze the strength of top beam in different conditions using finiteelement technology .Establishing the virtual prototype of type ZH1600/16/24Z(A) the wholetop beam combination slid ing hydraulic support using software CATIA and then to check theinterference of hydraulic support. The software HyperMesh applys to clea n-up the geometricmodel and to divide the finite element mesh.Defining materia l properties,boundary conditionand applying load in software ABAQUS, and then obtain stress cloud map and offset cloud map about top beam in different conditions, from which to find out the positions that aredama ged mostly.Accord ing to these data to provide some references for designer. To analyzethe strength of column and carry out virtual type-tests using finite eleme nt technology,combining the result of theoretica l strength checking to know that the design of column ismuch conservative.To improve the design of column, and then to analyze the strength ofcolumn and carry out virtual type-tests using finite element technology again. The resultindica tes that the improved design program is feasible theoretica lly.
     Virtual prototyping and finite element technology applying to hydraulic support is acomplex, long-term work, the research in the paper is only the initia l and exploratory study.
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