レーザスポット溶接によるステンレス鋼ダブルスキンパネル材料の開発(第2報) : パネルの等価剛性モデルの検討

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The Stainless steel double-skin panel consists of a corrugated sheet sandwiched between two face sheets and a flange installed on the rim of the panel. Adoption of the laser spot welding in jointing these materials each other has realized such a welded structure with less thermal deformation. This structure has these advantages; the laser spot welding controlling the penetration depth precisely secures resistance to corrosion equivalent to the base material and good design of a luster specific to stainless steels without leaving any welding marks on the outer sheet; the flange installed on the panel raises the stiffness and strength, which enables the use of conventional methods including resistance spot welding just the way they are to joint with other materials. An equivalent stiffness model is required to apply the double-skin structure in a large structure like a rail vehicle body to study the stiffness and the vibration mode in the double-skin structure. But there is a problem that application of FEM model adopting the double-skin structure in detail to a large structure increases the load on the calculator. Thus we tried to solve this problem by creating an equivalent stiffness model of the double-skin panel. First of all, we formulated the equivalent stiffness model of the double-skin panel and studied the validity of the model based on the result of the mechanical property assessment test of a small specimen. Then we prototyped a full-scale rolling stock on which a SUS double-skin panel was installed to conduct various load tests, and evaluated the validity of the model by comparing the measurement value of the deformation amount of the vehicle structure with the calculation result of the equivalent stiffness model. As a result, the possibility of application of double-skin panels to large structures was achieved.
2008-12-05

レーザスポット溶接によるステンレス鋼ダブルスキンパネル材料の開発(第2報) : パネルの等価剛性モデルの検討

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