【摘要】 本文首先将 Kirchhoff变换推广到导热系数为温度的多项式的非定常非线性热传导问题.并用分析方法确定热传导问题的边界条件.其次提出以孕育期叠加法并引用线性混合法则来模拟金属热处理过程的多相瞬态相变,较为简便地确定相变的开始时间、相变的种类及相变组织的数量.最后利用三维双重边界元法分析工件多种形式的热处理全过程.算例的数值计算结果表明本文方法行之有效.更多还原

【Abstract】 In this paper, the kirchhoff’s transformation is generalized to the nonlinear heal conduction problem which the heat conductivity can be ixprcssod as a multinomial of temperature firstly, the boundary condition of heat conduct ion problem is determined by analytics.Secondly, the incubation poroidsuperposition and the linear combination law is employed to simulate the transient phases transformation in the process of heat treatment of matjrials. That the boginning time of phase Iransfonmation and i.he amount of phase constitution is determined simply.Finally, the three-dimension Dual Reciprocity Boundary Element Method is used to analyse the total process of various heat treatment of compoment, the results of numerical calculation of txamples show that the method provided in this paper is effective.更多还原