移動熱源の周辺に対称冷却端が存在する場合の温度場 : 水中溶接部の温度履歴推定のための熱伝導解析

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The paper describes the method of solving differential equation of heat conduction for moving source under the boundary condition that the equiradial surface of fininite length around a heat source, i. e., semi-spherical surface for a point source and cylindrical surface for a linear one, is kept constant temperature, supposing to estimate thermal field in underwater welding by local cavity methods. Analyses are conducted for point and linear heat sources and rigorous solutions are obtained, and their results are compared in detail with Rosenthal's solutions. Furthermore, the average cooling rate at particular temperature range, which is practically useful for the prediction of hardness of welded part of steel plate, are analized using the obtained solutions and the effect of the radius of cooling terminal on the rate are clarified for various welding variables.
1980-10-05