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采用有限元方法对钢水连续测温传感器进行了瞬态热分析,并通过比较温度场的仿真结果和直接测量值对有限元模型进行了验证。在此基础上,通过间接耦合法计算得到了传感器的动态应力场。结果表明,普通型和抗侵蚀型钢水连续测温传感器的高应力区位于传感器内腔距离底端250~450 mm区间,而快速响应型传感器的高应力区位于两种材料的接合部位。热应力最大值出现在插入钢水后40 s,普通型、抗侵蚀型和快速响应型传感器的最大热应力分别为3.2、3.4和6.0 MPa。
Finite element method was used to conduct transient thermal analysis of molten steel continuous temperature sensor, and the finite element model was verified by comparing the simulation results of temperature field and direct measurement. On this basis, the dynamic stress field of the sensor is calculated by the indirect coupling method. The results show that the high-stress zone of continuous-type temperature sensor is located in the range of 250-450 mm from the bottom of the sensor cavity, while the high-stress zone of the rapid response sensor is located at the junction of the two materials. The maximum thermal stress occurred 40 s after the molten steel was inserted. The maximum thermal stress of the conventional, erosion-resistant and rapid response sensors were 3.2, 3.4 and 6.0 MPa, respectively.