铸钢分叉节点基于ANSYS Workbench的疲劳性能研究
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摘要
为理解树状柱结构中的铸钢分叉节点在循环交变荷载作用下的疲劳性能,以ANSYS Workbench为基础,对一典型铸钢三分叉节点进行了在循环交变荷载作用下的疲劳分析.首先,采用控制变量法,逐一改变节点的几何参数,计算了节点在交变荷载作用下的疲劳寿命,然后分析了节点的疲劳性能,并讨论了不同的几何参数对铸钢分叉节点的疲劳寿命的影响规律.研究结果表明:交变荷载对铸钢分叉节点的受力性能有显著影响;节点的各个几何参数中θ、γ、β、R_1、R_2对节点的疲劳寿命影响较大;节点的主分管汇交核心区域处所能承受的循环荷载次数最少、安全性最低,是整个节点的最薄弱环节.
In order to understand the fatigue behavior of the cast-steel joint with branches,the fatigue analysis of a typical cast-steel joint with three branches under cyclic loading was carried out by using the ANSYS Workbench.The geometric parameters of the joint were changed one by one,and the fatigue life of the joint under the action of alternating loads was calculated by using the method of parameters control at first.Then the fatigue performance of the joint was analyzed.Moreover,the influence of different geometric parameters on the fatigue life of the cast steel joint with branches was discussed.The results show that alternating load has a significant effect on the mechanical behavior of the cast-steel joint with branches.The geometric parameters such asθ,γ,β,R_1 and R_2 have great influences on the fatigue life of the joint.The number of cycles at the core area between the main pipe and branch pipe is the least,and this area is the weakest part of the whole joint.
In order to understand the fatigue behavior of the cast-steel joint with branches,the fatigue analysis of a typical cast-steel joint with three branches under cyclic loading was carried out by using the ANSYS Workbench.The geometric parameters of the joint were changed one by one,and the fatigue life of the joint under the action of alternating loads was calculated by using the method of parameters control at first.Then the fatigue performance of the joint was analyzed.Moreover,the influence of different geometric parameters on the fatigue life of the cast steel joint with branches was discussed.The results show that alternating load has a significant effect on the mechanical behavior of the cast-steel joint with branches.The geometric parameters such asθ,γ,β,R_1 and R_2 have great influences on the fatigue life of the joint.The number of cycles at the core area between the main pipe and branch pipe is the least,and this area is the weakest part of the whole joint.
引文
[1]陈俊,张其林,谢步瀛.树状柱在大跨度空间结构中的研究与应用[J].钢结构,2010,25(3):1-4.CHEN J,ZHANG Q L,XIE B Y.Research and application of dendritic column in long-span spatial structure[J].Steel Construction,2010,25(3):1-4.
[2]吴卫华,杜文风.树状柱结构空间四分叉铸钢节点受力性能分析[J].河南大学学报(自然科学版),2014,44(6):738-742.WU W H,DU W F.Loaded analysis of spatial cast-steel joint with four branches in tree-like structure[J].Journal of Henan University(Natural Science),2014,44(6):738-742.
[3]吴卫华,董正方,杜文风.树状结构空间四分叉铸钢节点抗弯极限承载力分析[J].河南大学学报(自然科学版),2015,45(4):482-486.WU W H,DONG Z F,DU W F.The analysis of ultimate flexural capacity of spatial cast-steel joint with four branches in tree-like structure[J].Journal of Henan University(Natural Science),2015,45(4):482-486.
[4]雷宏刚,付强,刘晓娟.中国钢结构疲劳研究领域的30年进展[J].建筑结构学报,2010,S1(17):84-91.LEI H G,FU Q,LIU X J.Research progress of steel structure fatigue in past 30years in China[J].Journal of Building Structures,2010,S1(17):84-91.
[5]钟炜辉,郝际平,黄会容.金属结构的疲劳损伤有限元分析研究[J].西安建筑科技大学学报(自然科学版),2006,38(4):495-498.ZHONG Y H,HAO J P,HUANG H R.Research on the finite element analysis of fatigue damage for metal structures[J].Journal of Xi’an University of Architecture&Technology(Natural Science),2006,38(4):495-498.
[6]靳慧,张其林,王洪军.铸钢节点的构件疲劳强度验算方法[J].钢结构,2008,23(10):17-21.JIN H,ZHANG Q L,WANG H J.Check on fatigue strength of members for cast steel node[J].Steel Construction,2008,23(10):17-21.
[7]朱民伟,钱英豪,周鹏飞.基于ANSYS的疲劳累积损伤计算方法[J].化工装备技术,2013,34(2):24-26.ZHU W M,QIAN Y H,ZHOU P F.Cumulative fatigue damage calculations based on ANSYS[J].Chemical Equipment Technology,2013,34(2):24-26.
[8]彭玉灵,赵永翔,胡海斌.ZG230-450铸钢的重构疲劳可靠性S-N曲线[J].工程力学,2007,24(10):46-50.PENG Y L,ZHAO Y X,HU H B.Reconstructed fatigue reliability S-N curves of ZG230-450cast-steel[J].Engineering Mechanics,2007,24(10):46-50.
[9]HYUNGYIL L,NAHMHO K,TAE SOO L.Overload failure curve and fatigue behavior of spot-welded specimens[J].Engineering Fracture Mechanics,2005,72(8):1203-1221.
[10]靳慧,李菁,李爱群.波浪载荷下海中观光塔铸钢节点疲劳强度验算[J].西南交通大学学报,2010,45(5):692-697.JIN H,LI J,LI A Q.Checking calculation of fatigue strength for cast steel joints of offshore tour tower under wave loads[J].Journal of Southwest Jiaotong University,2010,45(5):692-697.
[11]Jenny Andersson.The influence of grain size variation on metal fatigue[J].International Journal of Fatigue,2005,27(8):847-852.
[12]谢曙辉,吉伯海,傅中秋.钢桥面板疲劳裂纹钻孔止裂分析及实验验证[J].河南大学学报(自然科学版),2016,46(6):732-738.XIE S H,JI B H,FU Z Q.Numerical analysis and experimental verification of stop-hole method for fatigue crack I steel bridge deck[J].Journal of Henan University(Natural Science),2016,46(6):732-738.
[13]LEE H C,LEE Y,LEE S Y.Tool life prediction for the bolt forming process based on high-cycle fatigue and wear[J].Journal of Materials Processing Technology,2008,201(1-3):348-353.
[14]崔闯,卜一之,张清华.基于热点应力法的正交异性钢桥面板疲劳寿命评估[J].桥梁建设,2014,44(4):62-67.CUI C Z,BU Y Z,ZHANG Q H.Fatigue life assessment of orthotropic steel deck plate based on hot spot stress method[J].Bridge Construction,2014,44(4):62-67.
[2]吴卫华,杜文风.树状柱结构空间四分叉铸钢节点受力性能分析[J].河南大学学报(自然科学版),2014,44(6):738-742.WU W H,DU W F.Loaded analysis of spatial cast-steel joint with four branches in tree-like structure[J].Journal of Henan University(Natural Science),2014,44(6):738-742.
[3]吴卫华,董正方,杜文风.树状结构空间四分叉铸钢节点抗弯极限承载力分析[J].河南大学学报(自然科学版),2015,45(4):482-486.WU W H,DONG Z F,DU W F.The analysis of ultimate flexural capacity of spatial cast-steel joint with four branches in tree-like structure[J].Journal of Henan University(Natural Science),2015,45(4):482-486.
[4]雷宏刚,付强,刘晓娟.中国钢结构疲劳研究领域的30年进展[J].建筑结构学报,2010,S1(17):84-91.LEI H G,FU Q,LIU X J.Research progress of steel structure fatigue in past 30years in China[J].Journal of Building Structures,2010,S1(17):84-91.
[5]钟炜辉,郝际平,黄会容.金属结构的疲劳损伤有限元分析研究[J].西安建筑科技大学学报(自然科学版),2006,38(4):495-498.ZHONG Y H,HAO J P,HUANG H R.Research on the finite element analysis of fatigue damage for metal structures[J].Journal of Xi’an University of Architecture&Technology(Natural Science),2006,38(4):495-498.
[6]靳慧,张其林,王洪军.铸钢节点的构件疲劳强度验算方法[J].钢结构,2008,23(10):17-21.JIN H,ZHANG Q L,WANG H J.Check on fatigue strength of members for cast steel node[J].Steel Construction,2008,23(10):17-21.
[7]朱民伟,钱英豪,周鹏飞.基于ANSYS的疲劳累积损伤计算方法[J].化工装备技术,2013,34(2):24-26.ZHU W M,QIAN Y H,ZHOU P F.Cumulative fatigue damage calculations based on ANSYS[J].Chemical Equipment Technology,2013,34(2):24-26.
[8]彭玉灵,赵永翔,胡海斌.ZG230-450铸钢的重构疲劳可靠性S-N曲线[J].工程力学,2007,24(10):46-50.PENG Y L,ZHAO Y X,HU H B.Reconstructed fatigue reliability S-N curves of ZG230-450cast-steel[J].Engineering Mechanics,2007,24(10):46-50.
[9]HYUNGYIL L,NAHMHO K,TAE SOO L.Overload failure curve and fatigue behavior of spot-welded specimens[J].Engineering Fracture Mechanics,2005,72(8):1203-1221.
[10]靳慧,李菁,李爱群.波浪载荷下海中观光塔铸钢节点疲劳强度验算[J].西南交通大学学报,2010,45(5):692-697.JIN H,LI J,LI A Q.Checking calculation of fatigue strength for cast steel joints of offshore tour tower under wave loads[J].Journal of Southwest Jiaotong University,2010,45(5):692-697.
[11]Jenny Andersson.The influence of grain size variation on metal fatigue[J].International Journal of Fatigue,2005,27(8):847-852.
[12]谢曙辉,吉伯海,傅中秋.钢桥面板疲劳裂纹钻孔止裂分析及实验验证[J].河南大学学报(自然科学版),2016,46(6):732-738.XIE S H,JI B H,FU Z Q.Numerical analysis and experimental verification of stop-hole method for fatigue crack I steel bridge deck[J].Journal of Henan University(Natural Science),2016,46(6):732-738.
[13]LEE H C,LEE Y,LEE S Y.Tool life prediction for the bolt forming process based on high-cycle fatigue and wear[J].Journal of Materials Processing Technology,2008,201(1-3):348-353.
[14]崔闯,卜一之,张清华.基于热点应力法的正交异性钢桥面板疲劳寿命评估[J].桥梁建设,2014,44(4):62-67.CUI C Z,BU Y Z,ZHANG Q H.Fatigue life assessment of orthotropic steel deck plate based on hot spot stress method[J].Bridge Construction,2014,44(4):62-67.