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对周期性瞬态导热的半无限大级数解进行了理论分析，结合有限元算法，证实了周期性瞬态导热的温度波动深度和有限元网格尺度都具有相似性，据此提出了保证周期性瞬态导热问题有限元求解精度的网格剖分规则，并应用该规则对发动机燃烧室壁进行了实例计算。
The theoretical analysis of semi-infinite large-order series solution of periodic transient heat conduction is carried out. Combined with the finite element algorithm, it is verified that the temperature fluctuation of periodic transient heat conduction is similar to the finite element mesh scale, Periodic meshing problem of finite element method for solving transient thermal conduction problems was studied. The calculation of engine combustion chamber wall was carried out by applying this rule.