【作者】 魏雷；

【导师】 陈学东；

【作者基本信息】 华中科技大学 ， 机械工程， 2011， 硕士

【摘要】 煤矿液压支架适应性强,在多种工况下使用均收效良好,是目前广泛使用的放顶煤液压支架架型。但是由于井下工况复杂,液压支架的安全性要求高,在各个零件的设计过程中必须要确保结构件的强度,否则若液压支架因为强度不足而损坏将会带来严重的生命财产损失。本文针对现有设计过程中所使用的校核模型的局限性和计算的复杂性,探讨了一种适合液压支架强度校核的模型,并依据该校核方法开发了一种能对液压支架任意关键截面进行强度校核的软件,极大的方便了设计人员对液压支架的校核计算。在分析液压支架的结构和受力情况以及了解液压支架在井下受损状态的前提下,根据受力状况和现场工作情况确定了液压支架的危险截面,并分析结构件的应力状态。归纳总结各种强度校核方法,根据液压支架危险截面的特征找出一种了合适的强度校核方法,通过实例计算来验证该方法的可靠性。依据该强度校核方法设计强度校核软件系统,该系统既能方便地绘制参数化截面图形,并将图形进行保存和实时显示。在用户选择好校核方式并输入截面的受力大小后,能快速地计算和显示出各个部位的应力状态。根据郑州煤矿机械厂提供的数据进行实例计算,以有限元分析结果为参考依据,验证该校核软件的准确性。更多还原

【Abstract】 Coal-caving hydraulic support has been widely used at present as its strong adaptability and good result in many conditions. But hydraulic support demands high security because the working conditions are very complex underground, then we must ensure the strength of the structures when we design them. This paper focuses on the checking model for the strength of hydraulic support and the complexity of computing. In order to check the strength of the hydraulic support, a checking model that is suit for strength check was introduced, and was written into software.First of all, based on analyzing the structure and the stress state and damaged state of hydraulic support, the dangerous section was confirmed according to the stress state and working condition.Then, summarized all kinds of strength check method and found a suitable method in line with the characteristic of the dangerous section. Tested and verified the accuracy of this method.On the basis of the strength check method, a kind of software that was used for strength check was written. This software could draw parametric graphic section easily and store the graphic and timely display. It could calculate and display the stress state of every part of the section after the users input the force.At last, calculation examples ware done to test and verify the accuracy of this software according to the data provided by Zhengzhou coal mine machinery factory.更多还原