模拟热瞬态螺钉变形行为试验研究
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摘要
螺钉联接是机械设备中广泛使用的联接方式,不仅可拆装,而且不会损毁被联接件的任何部位,故大量螺钉使用于反应堆堆内构件零部件的联接。为了研究反应堆堆内构件联接螺钉因反应堆运行热瞬态温差引起的变形行为,本试验采用了在常温下施加等效滑移量的方法来观察螺钉变形情况。通过试验发现当被联接件发生相对滑移时螺钉头存在转角和滑移现象,并得到了螺钉在不同规格和不同预紧扭矩下螺钉变形规律,为工程实际螺钉设计优化和有限元分析提供试验依据。
Screw connection is a widely used connection method in mechanical equipment.It can not only be assembled and disassembled,but also does not damage any connected part.Therefore,a large number of screws are used to connect the components of the reactor internals.In order to study the deformation behavior caused by the thermal transient temperature difference of the reactor during operation,the joint screws of the reactor internals were used to observe the deformation of the screws by applying the equivalent slip at room temperature.Through the test,it was found that when the connected parts slipped,the screw heads were rotated and slipped,and the deformation rules of the screw under different sizes and different pre-tightening torques are obtained,providing experimental basis for engineering screw design optimization and finite element analysis of the project.
Screw connection is a widely used connection method in mechanical equipment.It can not only be assembled and disassembled,but also does not damage any connected part.Therefore,a large number of screws are used to connect the components of the reactor internals.In order to study the deformation behavior caused by the thermal transient temperature difference of the reactor during operation,the joint screws of the reactor internals were used to observe the deformation of the screws by applying the equivalent slip at room temperature.Through the test,it was found that when the connected parts slipped,the screw heads were rotated and slipped,and the deformation rules of the screw under different sizes and different pre-tightening torques are obtained,providing experimental basis for engineering screw design optimization and finite element analysis of the project.
引文
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[2]施耀新,张明乾.CPR1000堆内构件螺栓紧固件的转化设计[J].核动力工程,2009,30(S2):60-62.(Shi Yao-xin,Zhang Ming-qian.Study on localization technology of bolt fasteners for CPR1000 Internals[J].Nuclear Power Engineering,2009,30(S2):60-62.)
[3]杨仁安、施国麟、梁星筠.紧固件的防松性能分析[C].第十一届全国反应堆结构力学会议.成都:中国力学学会,2000:61-64.(Yang Ren-an,Shi Guo-lin,Liang Xin-yun.Analysis of locking performance of fasteners[C].The 11th National Conference on Structural Mechanics in Reactor Technology.Chengdu:The Chinese Society of Theoretical and Applied Mechanics,2000:61-64.)
[4]孙汉虹.第三代核电技术AP1000[M].北京:中国电力出版社,2010.(Sun Han-hong.The Third-Generation Nuclear Power Technology AP1-000[M].Beijing:China Electric Power Press,2010.)
[5]秦勉,于涛,李志锋.承压热冲击下AP1000压力容器直接安注接管温度瞬态初步研究[J].南华大学学报:自然科学版,2013,27(3):1-5.(Qin Mian,Yu Tao,Li Zhi-feng.A preliminary study on transient states of temperature in AP1000 RPV DVI-Nozzle under PTS[J].Journal of University of South China:Science&Technology,2013,27(3):1-5.)
[6]M.Groper.Microslip and macroslip in bolted joints[J].Experimental Mechanics,1985,25(2):46-56.
[7]H.Ouyang,M.J.Oldfield,J.E.Mottershead.Experimental and theor etical studies of a bolted joint excited by a torsional dynamic load[J].International Journal of Mechanical Sciences,2006,48(12):1447-1455.
[8]徐建设,陈以一,韩琳.普通螺栓和承压型高强螺栓抗剪连接滑移过程[J].同济大学学报:自然科学版,2003,31(5):510-514.(Xu Jian-she,Chen Yi-yi,Han Lin.Slip process analysis of regular bolt and bearing type high-tensile bolt shear connections[J].Journal of Tongji University:Natural Science,2003,31(5):510-514.)
[9]卜炎.螺纹联接件设计与计算[M].北京:高等教育出版社,1995.(Bu Yan.Design and Calculation on Thread Joint[M].Beijing:Higher Education Press,1995.)
[10]山本晃.螺纹联接的理论与计算[M].郭可谦,译.上海:上海科学技术文献出版社,1984.(Yamamoto P.Theory and Calculation of Threaded Fasteners[M].Guo Ke-qian,trans.Shanghai:Shanghai Science and Technology Literature Press,1984.)