船用钢板高频感应加热热源简化计算方法

Simplified calculation method for high frequency induction heating source of ship plate

[目的]在钢板感应加热的数值计算中,通常采用磁热耦合计算方法。该方法虽然结果准确,但建立的模型非常复杂,且计算需耗费大量时间。为此,[方法]通过计算和理论推导,提出一种高频感应加热热源的简化计算方法,以一个空间函数形式的热源模型来代替复杂的电磁热耦合计算。使用COMSOL Multi-physics软件建立钢板静止式感应加热有限元模型,运用磁热耦合计算方法和简化方法分别计算钢板加热后的温度场,并对采用2种方法得到的温度场分布结果进行比较,以验证简化方法应用到热源模型的可靠性。[结果]结果表明,运用所提简化计算方法得到的热源模型具有可靠性。[结论]相比于磁热耦合的方法,采用热源简化方法计算钢板感应加热过程,可以有效缩短计算时间,且在钢板移动式感应加热的计算中,能很好地解决模型过于复杂、计算时间过长等问题。

[Objectives]In the numerical calculation of steel plate induction heating,the electromagnetic thermal coupling method is usually adopted.Although the results obtained by this method are accurate,the built model is complex and requires vast number of calculations and computational time.Therefore,[Methods]a new simplified method is proposed based on computations and deductions,replacing the complex electromagnetic thermal coupling calculation with a spatial function mode of heat source model.A finite element model of a steel plate for static induction heating is built using COMSOL Multi-physics software.Then the regular electromagnetic thermal coupling method and the simplified method are both applied to calculate the temperature field of a heated steel plate,and the temperature distributions gained by these two methods are compared to verify the reliability in heat source model application.[Results]The result shows that the proposed method applied to heat source model is reliable.[Conclusions]Compared with the electromagnetic thermal coupling method,the computational time can be effectively reduced by using this method to calculate the induction heating process of a steel plate,and the calculation of mobile heating can be solved effectively.