摘要
建立了铁路信号继电器在热-电耦合作用下的数学模型,通过得到的有限元模型分析了不同环境温度下铁路信号继电器温度场的变化情况,仿真计算过程中考虑了环境温度以及温度的冲击。结果表明:铁路信号继电器的温升随环境温度的升高而降低;触头的温度从室温到稳态温度呈对数增长,并计算得到触头的热时间常数,推导出触头温升的理论曲线;温度冲击对铁路信号继电器影响较大,触头温度与环境温度呈正相关。
Mathematical model of the railway signaling relay was established under the effect of heat-electricity coupling. Railway signaling relay temperature fi eld variation under different temperature was analyzed with the fi nite element model considering environment temperature, and impact of the temperature was taken into consideration in the process of simulation calculation. It indicated that relay temperature rise decreased with the environmental temperature rise; Contact temperature from room temperature to the steady state temperature exponentially raised, and the thermal time constant of the resistance was calculated to deduce the theory of contact resistance temperature rise curve; Temperature had a greater impact on the contact, and contact temperature and environmental temperature were positively correlated.
出处
《机车电传动》
北大核心
2016年第6期59-63,共5页
Electric Drive for Locomotives
基金
河北省自然科学基金项目(E2016202206)
关键词
铁路信号继电器
温度场分析
有限元计算
热电耦合
railway signaling relay
thermal fi eld analysis
FEM analysis
heat-electricity coupling
