ULTRASONIC PEENING METHOD AND FLOATING BUILDING

• Main Authors: FUKUOKA TETSUJI, DEGUCHI TAKANORI, KANO DAICHI, SHIMODA TAICHIRO, HARA JUNYA, MOURI MASASHI, KOSHIO KEISUKE, OKADA TETSUO, INAMURA FUMIHIDE
• Format: Patent
• Language: English; Korean
• Published: 29.05.2013
• Subjects: ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GRINDING; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; POLISHING; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

An ultrasonic peening method which, in order to improve the fatigue strength of the weld (3) between a floating building (1) and a structure (2) welded to the floating building (1), applies an impact to the weld (3) by a pin (4) vibrated by an ultrasonic wave. The ultrasonic peening method comprises: a building construction step for constructing the floating building (1); a structure welding step for attaching the structure (2) to the floating building (1) by welding; a building launching step for lowering the floating building (1), to which the structure (2) has been attached, into water; and an ultrasonic peening step for applying ultrasonic peening to the weld (3) of the floating building (1) having buoyancy.