[1]苗广威,陈志超,张 轶,等.光伏支架中螺栓连接和拉铆连接在轴向循环荷载作用下的松动行为对比试验研究[J].西安建筑科技大学学报(自然科学版),2022,54(04):579-587.[doi:10.15986/j.1006-7930.2022.04.013]
　MIAO Guangwei,CHEN Zhichao,ZHANG Yi,et al.Comparative experimental study on the loosening behavior of bolted and riveted connections under axial cyclic loads in photovoltaic supports[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2022,54(04):579-587.[doi:10.15986/j.1006-7930.2022.04.013]
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光伏支架中螺栓连接和拉铆连接在轴向循环荷载作用下的松动行为对比试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
54
期数:
2022年04期
页码:
579-587
栏目:
出版日期:
2022-08-28

文章信息/Info

Title:
Comparative experimental study on the loosening behavior of bolted and riveted connections under axial cyclic loads in photovoltaic supports
文章编号:
1006-7930(2022)04-0579-09
作者:
苗广威1; 陈志超1; 张 轶1; 杨俊芬2; 3; 王维新2; 郝凯丽2
(1.中国能源建设集团 甘肃省电力设计院有限公司, 甘肃 兰州 730050; 2.西安建筑科技大学 土木工程学院, 陕西 西安 710055; 3.西安建筑科技大学 结构工程与抗震教育部重点实验室, 陕西 西安 710055)
Author(s):
MIAO Guangwei1;  CHEN Zhichao1;  ZHANG Yi1;  YANG Junfen2; 3;  WANG Weixin2;  HAO Kaili2
(1.China Energy Construction Group Gansu Electric Power Design Institute Co., Ltd; Lanzhou 730050,China; 2.School of Civil Engineering, Xi'an Univ. of Arch. & Tech., Xi'an 710055, China; 3.Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education(XAUAT), Xi'an 710055, China)
关键词:
拉铆连接;  螺栓连接;  防松性能;  轴向循环荷载;  微动磨损
Keywords:
riveted connection;  bolted connection;  anti-loosening performance;  axial circulating loads;  fretting wear
分类号:
TU391
DOI:
10.15986/j.1006-7930.2022.04.013
文献标志码:
A
摘要:
拉铆连接代替螺栓连接将提高光伏支架节点的防松性能。为研究光伏支架中采用拉铆连接代替螺栓连接的可行性,对比分析拉铆连接和螺栓连接轴向荷载下的防松性能,分别对规格8 mm的4.8级普通螺栓、4.8级防松螺栓以及5.8级小规格拉铆钉进行轴向循环荷载下的松动试验研究,并结合微观测试手段对其防松原理和损伤机制进行了研究。分析了三类连接在轴向循环荷载作用下的松动过程,研究了荷载幅值和频率对螺栓连接和拉铆连接松动行为的影响。研究表明:拉铆连接具有更好的防松性能; 松动过程包括预紧力迅速下降阶段和预紧力缓慢下降并趋于稳定的阶段; 随着荷载幅值的增大,螺栓连接和拉铆连接的松动程度增加,并且荷载幅值达到16 kN时螺栓完全松动而拉铆钉预紧力仅下降29.34%; 随着荷载频率的增加,螺栓连接和拉铆连接的松动程度降低,相同荷载频率拉铆连接的松动程度远小于螺栓连接; 拉铆钉圆弧结构的牙型和铆接成型后牙型配合面的过盈配合提高了其防松性能。
Abstract:
Riveted connections instead of bolted connections will improve the anti-loosening performance of the photovoltaic bracket nodes. In order to study the feasibility of using riveted connections instead of bolted connections in photovoltaic supports, the anti-loosening performance under axial loads of riveted connections and bolted connections was compared and analyzed, and the loosening test under axial cyclic loads of 4.8-grade common bolts, 4.8-grade anti-loosening bolts and 5.8-grade small-gauge rivets with a specification of 8 mm were studied respectively,and the anti-loosening principle and damage mechanism were studied in combination with microscopic test methods. The loosening process of three types of connections under the action of axial cyclic loads is analyzed, and the influence of load amplitude and frequency on the loosening behavior of bolted connections and riveted connections is studied. The results show that the riveted connections has better anti-loosening performance; The loosening process includes a stage of the preload decreases rapidly, and another stage of the preload slowly decreases and stabilizes; As the load amplitude increases, the degree of loosening of the bolted connection and the riveted connection increases, and the bolt is completely loosened when the load amplitude reaches 16 kN, and the rivet preload decreases by only 29.34%; As the load frequency increases, the degree of loosening of bolted and riveted connections decreases, Riveted connections with the same load frequency are much less loose than bolted connections.The taping of the tooth shape of the riveted connection arc structure and the interference fit of the tooth shape mat after riveting form improve its anti-loosening performance.

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相似文献/References:

[1]张广平,杨飞龙,张 轶,等.光伏支架中螺栓连接和拉铆连接腐蚀前后抗剪性能对比试验研究[J].西安建筑科技大学学报(自然科学版),2022,54(04):569.[doi:10.15986/j.1006-7930.2022.04.012]
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备注/Memo

备注/Memo:
收稿日期:2022-06-11修改稿日期:2022-08-12
基金项目:陕西省自然科学基础研究计划面上项目(2022JM-308); 陕西省教育厅服务地方专项科研计划项目(21JC019)
第一作者:苗广威(1985—),男,硕士生,工程师,研究方向为新能源设计与应用.E-mail:Miaoguangwei333@126.com
更新日期/Last Update: 2022-08-28