On the Thermal Stresses due to Welding of a Penetration Piece for a Watertight Bulkhead Plate(I) -Thermal Stresses in a Bulkhead Plate-

수밀격벽(水密隔壁)을 관통(貫通)하는 관(管)의 용접시공(熔接施工)으로 인(因)한 열응력해석(熱應力解析)(I) -격벽판(隔壁板)에서의 열응력(熱應力)-

As a first step of a thermal stress analysis in a watertight bulkhead plate during welding of a spool type penetration piece, the bulkhead plate has been idealized as infinite plate with a circular hole. The exact solution for the transient temperature distribution and the associated quasi-static thermal stress which arise in a infinite plate subjected to an instantaneous point source of heat acting on the periphery of the circular hole. And the solutions have been extended to the case of a moving heat source with the aid of the Duhamel's superposition integral. The solutions can be applied to the problems such as a circular cutting or welding of a plate.