风载与冲击载荷作用下钻架动力特性仿真分析
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摘要
针对露天矿用潜孔钻机钻架在高寒大风地区工作时受冲击载荷影响易出现大幅摆动的问题,采用数值仿真方法,对某一现场使用钻机进行不同风向载荷与冲击载荷同时作用下钻架结构动力学分析,得到结构幅频响应曲线及动应力响应规律.结果表明:有风载荷作用下钻架结构的最大摆幅与最大动应力值显著提高,结构安全系数降低;幅频响应及动应力响应规律与结构动态性能关系密切;风载荷作用方向不同时钻架最大动应力作用位置不变,但最大动应力值和振幅值有明显不同;风载荷作用方向与钻机车身平行时,钻架的动应力及摆动位移最大,结构安全系数最低.
In order to solve the problem that drilling frame of opencast DTH drill easily swings affected by the impact load in the extremely cold and windy areas at work, this paper carried out dynamic analysis on drilling frame structure under different directions of wind loading and impact loading by using the numerical simulation method, and gained the amplitude-frequency response curve and dynamic stress response law. The results show that the biggest swing and the maximum dynamic stress of drilling frame structure significantly increased and structure safety factor reduced; The amplitude frequency response and dynamic stress response law is closely related to structure dynamic performance; In different directions of the wind loading, maximum dynamic stress of drilling frame is always same, but the maximum dynamic stress and amplitude value have obvious differences; When the direction of wind loading is parallel to the drill body, the dynamic stress and the oscillating displacement of drilling frame is the largest and the structure safety coefficient is minimum.
In order to solve the problem that drilling frame of opencast DTH drill easily swings affected by the impact load in the extremely cold and windy areas at work, this paper carried out dynamic analysis on drilling frame structure under different directions of wind loading and impact loading by using the numerical simulation method, and gained the amplitude-frequency response curve and dynamic stress response law. The results show that the biggest swing and the maximum dynamic stress of drilling frame structure significantly increased and structure safety factor reduced; The amplitude frequency response and dynamic stress response law is closely related to structure dynamic performance; In different directions of the wind loading, maximum dynamic stress of drilling frame is always same, but the maximum dynamic stress and amplitude value have obvious differences; When the direction of wind loading is parallel to the drill body, the dynamic stress and the oscillating displacement of drilling frame is the largest and the structure safety coefficient is minimum.
引文
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[10]王敏.格构式钢管混凝土风力发电塔架的有限元分析[D].包头:内蒙古科技大学,2011.WANG Min.The finite element analysis of lattice concrete-filled wind tower turbine[D].Baotou:Inner Mongolia University of Science and Technology,2011.
[11]苏荣华,梁冰.工程结构分析ANSYS应用[M].沈阳:东北大学出版社,2012.SU Ronghua,LIANG Bing.Engineering Structure Analysis-ANSYS Application[M].Shenyang:Northeastern Uniersity Press,2012.
[12]祝水琴,骆江锋,谈志强.风机塔架的模态分析及优化设计[J].机械设计,2013,12(4):78-80.ZHU Shuiqin,LUO Jiangfeng,TAN Zhiqiang.Modal analysis and optimized design of wind turbine tower[J].Journal of Machine Design,2013,12(4):78-80.
[13]刘磊.单主梁门式起重机动态特性[J].辽宁工程技术大学学报(自然科学版),2013,32(4):521-526.LIU Lei.Dynamic characteristic of crane with single main girder[J].Journal of Liaoning Technical University(Natural Science),2013,32(4):521-526.
[2]范俭,周春雷,刘宏林,等.牙轮钻机钻架分组结构优化设计[J].沈阳建筑工程学院学报,1994,10(4):321-327.FAN Jian,ZHOU Chunlei,LIU Honglin,et al.Grouping and structure optimization for rotary drill[J].Journal of Shenyang Architectural and Civil Engineering Institute,1994,10(4):321-327.
[3]吴双斌,赵宏强,郭艳,等.潜孔钻机钻臂虚拟样机建模与动力学仿真[J].计算机仿真,2012,29(1):285-288.WU Shuangbin,ZHAO Hongqiang,GUO Yan,et al.Virtual prototype modeling and dynamic simulation of down-the-hole drill boom[J].Computer Simulation,2012,29(1):285-288.
[4]唐田秋,陈利平,邢春太.YZ-35C牙轮钻机钻架有限元分析及结构优化设计[J].煤矿机械,2005(1):5-7.TANG Tianqiu,CHEN Liping,XING Chuntai.YZ-35C finite element analysis and structural optimization design for rotary drill frame[J].Coal Mine Machinery,2005(1):5-7.
[5]韩新平,靳春华,苏荣华.露天矿用钻机钻架结构强度[J].辽宁工程技术大学学报(自然科学版),2013,32(2):145-148.HAN Xinping,JIN Chunhua,SU Ronghua.Structural strength analysis of drilling frame for open-pit[J].Journal of Liaoning Technical University(Natural Science),2013,32(2):145-148.
[6]易辉成,刘海燕,王杏芳.潜孔钻机钻架结构的有限元分析[J].工程机械,2013(44):15-18.YI Chenghui,LIU Haiyan,WANG Xingfang.The finite element analysis of DTH drilling rig drilling frame structure[J].Engineering Machinery,2013(44):15-18.
[7]赖茂河,刘立,杨春晖,等.基于Cosmos/Works的牙轮钻机钻架结构强度分析[J].冶金设备,2007,166(6):26-29.LAI Maohe,LIU Li,YANG Chunhui,et al.The intensity analysis of frame for gear driller based on cosmos/works software[J].Metallurgical Equipment,2007,166(6):26-29.
[8]Gavasheli L S.Longitudinal and transverse vibrations of the frame and the machine section of a rotary drillingrig[J].Soviet Mining Science,1991,26(5):443-450.
[9]周平槐,赵阳,黄业飞.风荷载作用下柱支承钢筒仓的受力性能[J].工程设计学报,2005,12(4):243-246.ZHOU Pinghuai,ZHAO Yang,HUANG Yefei.Performance under force of column-supported steel silos under wind loading[J].Journal of Engineering Design,2005,12(4):243-246.
[10]王敏.格构式钢管混凝土风力发电塔架的有限元分析[D].包头:内蒙古科技大学,2011.WANG Min.The finite element analysis of lattice concrete-filled wind tower turbine[D].Baotou:Inner Mongolia University of Science and Technology,2011.
[11]苏荣华,梁冰.工程结构分析ANSYS应用[M].沈阳:东北大学出版社,2012.SU Ronghua,LIANG Bing.Engineering Structure Analysis-ANSYS Application[M].Shenyang:Northeastern Uniersity Press,2012.
[12]祝水琴,骆江锋,谈志强.风机塔架的模态分析及优化设计[J].机械设计,2013,12(4):78-80.ZHU Shuiqin,LUO Jiangfeng,TAN Zhiqiang.Modal analysis and optimized design of wind turbine tower[J].Journal of Machine Design,2013,12(4):78-80.
[13]刘磊.单主梁门式起重机动态特性[J].辽宁工程技术大学学报(自然科学版),2013,32(4):521-526.LIU Lei.Dynamic characteristic of crane with single main girder[J].Journal of Liaoning Technical University(Natural Science),2013,32(4):521-526.