钢水连续测温传感器的热应力分析

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。

Thermal stress analysis of continuous liquid steel temperature sensor

Transient thermal analysis of continuous liquid steel temperature sensors（CLSTS）was carried out by finite element method， and the finite element model was proved by the real measurement data of temperature. After that， the dynamic stress field of sensors was computed from the temperature field by indirect coupling method. The results showed that high stress area for ordinary and corrosion-resisting CLSTS was between 250 and 450 mm above the bottom， while the one for fast response CLSTS located at the junction between different materials. The maximum thermal stress at high value zone reached its peak after CLSTS was inserted into molten steel for about 40 s. And the peak values of thermal stress were 3.2 MPa， 3.4 MPa and 6.0 MPa for ordinary， corrosion-resisting and fast response CTSFL individually.