本文主要研究内容
作者朱克川（2019）在《损伤缺陷对矿山井架的力学影响分析》一文中研究指出：矿山井架在安装和服役过程中,由于长期受日晒雨淋、安装误差、大气腐蚀和涂层施工工序不规范等影响,会产生各种损伤缺陷,使其难以符合设计载荷要求。近年来,井架易损性的研究在逐步开展,但对井架损伤缺陷的研究大多停留在单一缺陷下,对多种损伤缺陷共同作用下井架安全性的研究尚不够全面,本文研究了井架在合理损伤范围内,通过有限元仿真分析结果对井架结构的安全性做出评定,为有损伤缺陷的在役井架结构安全提供一个科学、有效的评估方法,为矿山井架的设计和维护提供一些具有参考价值的结论。(1)在合理损伤范围内,关键杆件和立柱杆件的局部锈蚀、局部弯曲以及局部复合缺陷对井架的整体应力和位移影响均较小,井架结构最大应力和水平位移相比于无缺陷时分别增加了 2.5%和4.9%,但对损伤杆件本身的应力影响较大。(2)在合理沉降范围内,支座沉降对井架结构的整体受力影响很小,对水平位移影响较大。沉降改变了原有井架的受力体系且沉降过大易引起倾覆,在井架施工安装过程中,应注意地基基础的处理。在关键杆件局部损伤和支座沉降的复合缺陷中井架结构最大应力相比于无缺陷时最大下降了 4.2%,但最大水平位移最大增大了 9.2%。(3)整体适度倾斜对井架安全影响较小,但是整体锈蚀损伤缺陷导致井架结构最大应力和最大水平位移最大增大了 52.5%和54.6%。(4)整体锈蚀、整体倾斜和支座沉降以及局部损伤缺陷的复合中,井架结构最大应力和水平位移相比于无缺陷井架结构分别增大了 44.1%和63.1%。(5)无损伤缺陷井架第一阶频率为1.7930,无支座沉降的损伤缺陷第一阶频率为1.4528,损伤缺陷第一阶频率为1.4523;损伤缺陷导致井架的频率降低,侧向刚度减小;支座沉降使损伤井架的频率进一步降低,但是降低幅度很小。(6)在时程分析中得出,无损伤缺陷井架最大层间位移角为1/1176,井架最大应力50.7Mpa;损伤缺陷下井架最大层间位移角为1/813,最大应力90.4Mpa;损伤缺陷对位移影响较小,对应力影响较大。图[55]表[7]参[58]
Abstract
kuang shan jing jia zai an zhuang he fu yi guo cheng zhong ,you yu chang ji shou ri shai yu lin 、an zhuang wu cha 、da qi fu shi he tu ceng shi gong gong xu bu gui fan deng ying xiang ,hui chan sheng ge chong sun shang que xian ,shi ji nan yi fu ge she ji zai he yao qiu 。jin nian lai ,jing jia yi sun xing de yan jiu zai zhu bu kai zhan ,dan dui jing jia sun shang que xian de yan jiu da duo ting liu zai chan yi que xian xia ,dui duo chong sun shang que xian gong tong zuo yong xia jing jia an quan xing de yan jiu shang bu gou quan mian ,ben wen yan jiu le jing jia zai ge li sun shang fan wei nei ,tong guo you xian yuan fang zhen fen xi jie guo dui jing jia jie gou de an quan xing zuo chu ping ding ,wei you sun shang que xian de zai yi jing jia jie gou an quan di gong yi ge ke xue 、you xiao de ping gu fang fa ,wei kuang shan jing jia de she ji he wei hu di gong yi xie ju you can kao jia zhi de jie lun 。(1)zai ge li sun shang fan wei nei ,guan jian gan jian he li zhu gan jian de ju bu xiu shi 、ju bu wan qu yi ji ju bu fu ge que xian dui jing jia de zheng ti ying li he wei yi ying xiang jun jiao xiao ,jing jia jie gou zui da ying li he shui ping wei yi xiang bi yu mo que xian shi fen bie zeng jia le 2.5%he 4.9%,dan dui sun shang gan jian ben shen de ying li ying xiang jiao da 。(2)zai ge li chen jiang fan wei nei ,zhi zuo chen jiang dui jing jia jie gou de zheng ti shou li ying xiang hen xiao ,dui shui ping wei yi ying xiang jiao da 。chen jiang gai bian le yuan you jing jia de shou li ti ji ju chen jiang guo da yi yin qi qing fu ,zai jing jia shi gong an zhuang guo cheng zhong ,ying zhu yi de ji ji chu de chu li 。zai guan jian gan jian ju bu sun shang he zhi zuo chen jiang de fu ge que xian zhong jing jia jie gou zui da ying li xiang bi yu mo que xian shi zui da xia jiang le 4.2%,dan zui da shui ping wei yi zui da zeng da le 9.2%。(3)zheng ti kuo du qing xie dui jing jia an quan ying xiang jiao xiao ,dan shi zheng ti xiu shi sun shang que xian dao zhi jing jia jie gou zui da ying li he zui da shui ping wei yi zui da zeng da le 52.5%he 54.6%。(4)zheng ti xiu shi 、zheng ti qing xie he zhi zuo chen jiang yi ji ju bu sun shang que xian de fu ge zhong ,jing jia jie gou zui da ying li he shui ping wei yi xiang bi yu mo que xian jing jia jie gou fen bie zeng da le 44.1%he 63.1%。(5)mo sun shang que xian jing jia di yi jie pin lv wei 1.7930,mo zhi zuo chen jiang de sun shang que xian di yi jie pin lv wei 1.4528,sun shang que xian di yi jie pin lv wei 1.4523;sun shang que xian dao zhi jing jia de pin lv jiang di ,ce xiang gang du jian xiao ;zhi zuo chen jiang shi sun shang jing jia de pin lv jin yi bu jiang di ,dan shi jiang di fu du hen xiao 。(6)zai shi cheng fen xi zhong de chu ,mo sun shang que xian jing jia zui da ceng jian wei yi jiao wei 1/1176,jing jia zui da ying li 50.7Mpa;sun shang que xian xia jing jia zui da ceng jian wei yi jiao wei 1/813,zui da ying li 90.4Mpa;sun shang que xian dui wei yi ying xiang jiao xiao ,dui ying li ying xiang jiao da 。tu [55]biao [7]can [58]
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论文作者分别是来自安徽理工大学的朱克川，发表于刊物安徽理工大学2019-07-08论文，是一篇关于矿山井架结构论文,锈蚀论文,弯曲论文,支座沉降论文,复合损伤缺陷论文,安徽理工大学2019-07-08论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自安徽理工大学2019-07-08论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
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