摘要
建立了摩托车制动盘有限元模型,考虑散热系数随时间变化,辐射率随温度变化以及材料参数随温度变化的影响,运用MSC.nastran有限元软件对制动盘进行瞬态温度场分析;在热分析的基础上,采用热-机耦合法进行热应力计算。结果表明:在制动后2.2 s时制动盘达到最高温度150℃;2.8 s时最大应力达到169 MPa。分析得出制动盘较容易出现裂纹的部位是制动过程中的制动盘内部和制动结束后的制动盘表面上。
A finite element model of motorcycle brake disc was established. Considering the impact clue to the change of radiation coefficients over time, the emissivity over temperature, and the material parameters over temperature, the transient temperature field of the disc was analyzed by use of the finite element software MSC.nastran. On the basis of the thermal analysis,the thermal stress was calculated by the method of thermal- mechanical coupling. The simulation results indicate that brake disc reaches the max temperature 150℃ at 2.2 s,and at 2.8 s reaches the max stress 169 MPa. It＇s concluded that the interior of brake disc in the braking process and the surface of brake disc after the process are more prone to cracks.
出处
《农业装备与车辆工程》
2016年第11期19-24,共6页
Agricultural Equipment & Vehicle Engineering
基金
重庆市科委攻关项目资助项目(cstc2009ac6076)
关键词
制动盘
温度场
应力场
裂纹
brake disc
temperature field
stress field
cracks
