| Summary: | 碩士 === 臺灣大學 === 工程科學及海洋工程學研究所 === 95 === Generally, the double bottom and double hull of ships are two types of metal sandwich structures. In the past decades, because of the limitation of the welding technology and the size of facilities, the metal sandwich structures with depth less than human’s height were difficult to be constructed. Recently, the technology of laser welding are growing up and its investments are strongly reduced, the metal sandwich structure are taken into consideration by the American and European ship yards. The advantageous of sandwich structure such as the uniformity of strength, lighter weight for the same bending strength and the reserved space within double hull , are superior to conventional structures. The paper focus on ship collision problems, and hence the crashworthiness of metal sandwich structure was examined, and different type of core structures are compared.
In this paper, impact responses of sandwich structure with square-honeycomb core and truss-core were analyzed first. Both resistant force and energy dissipation for the two sandwich types structures are compared with monolithic plate with the same weight. The results are compared with experimental results by McShane (2005) to varify the tendency of resistant force versus penetrated depth. Subsequently, some experimental models from the series test of aluminum honeycomb sandwich structures by Paik(1999) are selected no case studies and the FE-analysis were perfomed. The analyzed results were compared with the experiment results to confirm their difference. Finally, resistant force and energy dissipation of sandwich structures with different core structures with the same weight are compared.
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