液黏传动软启动过程摩擦副应力场瞬态特性研究
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摘要
为了研究液黏传动摩擦副软启动过程应力场的分布特性,利用Abaqus软件建立三维摩擦副热弹性分析模型,采用间接耦合数值分析方法来预测应力场的瞬态特性,并对参数敏感性进行了分析。结果表明,软启动过程中对偶钢片热应力逐渐增大,在启动结束时达到最大值,且最大值位置逐渐向中心区域靠近;油槽具有良好的冷却效果,摩擦衬片热应力最大值出现在每个菱形区域的边缘;弹性模量和热膨胀系数有正影响,而厚度和泊松比有负影响;改变参数值对热应力最大值出现的位置无影响。分析结果为摩擦副结构参数和材料参数的选择提供了参考依据。
In order to investigation the distribution characteristic of stress field of friction pairs in hydroviscous drive during soft start-up process,Abaqus software is used to establish a three-dimensional thermal elastic analysis model of friction pairs. The indirect coupling numerical analysis method is adopted to predict the transient characteristics of stress field. In addition,the sensitivity of parameters is analyzed. The research results show that the thermal stress of the steel disc increases gradually during soft start-up process and reaches the maximum value at the end of the start-up process. And the position of the maximum value gradually approaches the central area. The oil grooves provide a good cooling effect and the maximum thermal stress of the friction lining appears at the edge of each rhombic region. The elastic modulus and thermal expansion positively impact the stress. Conversely,the thickness and Poisson's ratio negatively impact the stress. But the variance of parameters has no effect on the location of the maximum thermal stress. The analysis results provide reference for selecting the structural and material parameters of friction pairs.
In order to investigation the distribution characteristic of stress field of friction pairs in hydroviscous drive during soft start-up process,Abaqus software is used to establish a three-dimensional thermal elastic analysis model of friction pairs. The indirect coupling numerical analysis method is adopted to predict the transient characteristics of stress field. In addition,the sensitivity of parameters is analyzed. The research results show that the thermal stress of the steel disc increases gradually during soft start-up process and reaches the maximum value at the end of the start-up process. And the position of the maximum value gradually approaches the central area. The oil grooves provide a good cooling effect and the maximum thermal stress of the friction lining appears at the edge of each rhombic region. The elastic modulus and thermal expansion positively impact the stress. Conversely,the thickness and Poisson's ratio negatively impact the stress. But the variance of parameters has no effect on the location of the maximum thermal stress. The analysis results provide reference for selecting the structural and material parameters of friction pairs.
引文
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[2]王其良,崔红伟,廉自生,等.液黏传动摩擦副温度场分布特性的模拟[J].科学技术与工程,2018,18(13):232-237.
[3]马立刚,项昌乐,杜明刚,等.不同摩擦材料液黏离合器特性研究[J].机械传动,2016,40(1):27-31.
[4]张志刚,龙美元,石晓辉,等.离合器结合位移对压盘温升特性影响研究[J].机械传动,2016,40(2):6-9.
[5]杨勇强,李小莹,曹博涛,等.湿式摩擦离合器摩擦片的热力耦合分析[J].机械传动,2016,40(1):153-156.
[6]CUI J Z,XIE F W,WANG C T.Numerical investigation on thermal deformation of friction pair in hydro-viscous drive[J].Applied Thermal Engineering,2015,90:460-470.
[7]杨亚联,张喀,秦大同.湿式多片离合器热机耦合温度场及应力场分析[J].中国机械工程,2014,25(20):2740-2744.
[8]杨为,陆国栋,吕和生,等.湿式多片摩擦离合器对偶钢片热-机耦合分析[J].重庆大学学报,2011,34(9):26-32.
[9]GHADIMI B,SAJEDI R,KOWSARY F.3D investigation of thermal stresses in a locomotive ventilated brake disc based on a conjugate thermo-fluid coupling boundary conditions[J].International Communications in Heat and Mass Transfer,2013,49:104-109.
[10]GAO C H,HUANG J M,LIN X Z,et al.Stress analysis of thermal fatigue fracture of brake disks based on thermomechanical coupling[J].Journal of Tribology,2007,129(3):536-543.
[11]LI W B,HUANG J F,FEI J,et al.Simulation and application of temperature field of carbon fabric wet clutch during engagement based on finite element analysis[J].International Communications in Heat and Mass Transfer,2016,71:180-187.