基于ABAQUS的导电滑环的单丝静态接触力学特性分析
|
摘要
以单丝电刷和导电滑环的接触为研究对象,将单丝电刷和导电环的接触抽象为两圆柱体垂直接触的几何模型,结合赫兹椭圆产生式,推导出两圆柱体垂直接触的解析公式,并通过有限元软件ABAQUS模拟仿真分析单丝电刷和导电环垂直接触的状态,将有限元解与理论解进行对比。结果表明,刷丝和导电滑环垂直接触的解析公式与两球体赫兹接触的表达式相似,区别在于多了一个修正系数,该系数与两圆柱体的半径比值有关,当网格尺寸小于接触面椭圆短半轴的50%时,接触应力的有限元分析结果最佳,同时,有限元分析结果有效验证了导电滑环单丝静态接触解析公式的正确性。
The contact of single brush and slip-ring is abstracted to form a geometric model of two vertically contacting cylinders. Combined with the Hertz elliptic generation, an analytic formula is acquired. Through the finite element software ABAQUS, the simulation analysis of single brush and slip-ring vertical contact is carried out, and the solutions of the finite element are compared with the theoretical solutions. The results show that the analytic formula of brush and slip ring vertical contact is similar to the expression formula of two-ball Hertz contact. The difference is that expression formula of brush and slip ring vertical contact has a correction coefficient. The coefficient is related with the radius ratio of the two cylinders. When the grid size is 50% smaller than the elliptic short half axis of contact surface, the best result of the finite element analysis of the contact stress will be obtained. At the same time, the finite element analysis results effectively verify the correctness of the single brush and slip-ring static contact analytic formula.
The contact of single brush and slip-ring is abstracted to form a geometric model of two vertically contacting cylinders. Combined with the Hertz elliptic generation, an analytic formula is acquired. Through the finite element software ABAQUS, the simulation analysis of single brush and slip-ring vertical contact is carried out, and the solutions of the finite element are compared with the theoretical solutions. The results show that the analytic formula of brush and slip ring vertical contact is similar to the expression formula of two-ball Hertz contact. The difference is that expression formula of brush and slip ring vertical contact has a correction coefficient. The coefficient is related with the radius ratio of the two cylinders. When the grid size is 50% smaller than the elliptic short half axis of contact surface, the best result of the finite element analysis of the contact stress will be obtained. At the same time, the finite element analysis results effectively verify the correctness of the single brush and slip-ring static contact analytic formula.
引文
[1]薛萍,陈少兵,刘丽.电滑环中的导电环和电刷[J].光纤与电缆及其应用技术,2012(1):11-13.
[2]Grandin M,Wiklund U.Wear and electrical performance of a slip-ring system with silver–graphite in continuous sliding against PVD coated wires[J].Wear,2016(s348-349):138-147.
[3]周文韬.导电滑环的接触力学特征与磨损寿命分析[D].湘潭:湘潭大学,2014.
[4]于艳艳.风电滑环接触材料加速摩擦磨损试验研究[D].大连:大连理工大学,2016.
[5]Houenouvo A T H,Hofmann W.Finite element analysis of the contact problem between graphite-brushes and-Slip rings in double-fed asynchronous generators[C].International MultiConference on Systems,Signals and Devices,IEEE,2012:1-6.
[6]田红亮,方子帆,朱大林.赫兹点接触133年[J].三峡大学学报(自然科学版),2014,36(2):88-97.
[7]杨生华.齿轮接触有限元分析[J].计算力学学报,2003,20(2):189-194.
[8]刘佳鑫,王宝中,龙海洋,等.CAE技术在产品研发中的应用与战略思维[J].机械,2017(12):48-51.
[9]波波夫.接触力学与摩擦学的原理及其应用[M].北京:清华大学出版社,2011.
[10]Johnson K L.Contact mechanics[J].Journal of Tribology,1986,108(4):464.
[11]朱子宏,魏宪军.应用ABAQUS求解赫兹接触问题[J].机械,2009,36(3):11-13.
[2]Grandin M,Wiklund U.Wear and electrical performance of a slip-ring system with silver–graphite in continuous sliding against PVD coated wires[J].Wear,2016(s348-349):138-147.
[3]周文韬.导电滑环的接触力学特征与磨损寿命分析[D].湘潭:湘潭大学,2014.
[4]于艳艳.风电滑环接触材料加速摩擦磨损试验研究[D].大连:大连理工大学,2016.
[5]Houenouvo A T H,Hofmann W.Finite element analysis of the contact problem between graphite-brushes and-Slip rings in double-fed asynchronous generators[C].International MultiConference on Systems,Signals and Devices,IEEE,2012:1-6.
[6]田红亮,方子帆,朱大林.赫兹点接触133年[J].三峡大学学报(自然科学版),2014,36(2):88-97.
[7]杨生华.齿轮接触有限元分析[J].计算力学学报,2003,20(2):189-194.
[8]刘佳鑫,王宝中,龙海洋,等.CAE技术在产品研发中的应用与战略思维[J].机械,2017(12):48-51.
[9]波波夫.接触力学与摩擦学的原理及其应用[M].北京:清华大学出版社,2011.
[10]Johnson K L.Contact mechanics[J].Journal of Tribology,1986,108(4):464.
[11]朱子宏,魏宪军.应用ABAQUS求解赫兹接触问题[J].机械,2009,36(3):11-13.