CAJ | 학술논문

U型激光焊接夹层板在舰船防护结构设计中具有广阔的应用前景。文章基于非线性有限元软件Abaqus研究了激光穿透焊T型接头在弯矩载荷作用下结构的变形特征和极限承载能力，并对加载速率、焊缝尺寸对极限承载能力的影响进行了研究；然后研究了计及焊缝的U型夹层板的压皱力学行为，并分析了穿透焊缝处理方式及焊缝尺寸参数对压皱性能的影响。结果表明：激光穿透焊T型接头在弯曲变形模式下夹芯壁板趾端与面板发生接触，使得载荷重新分配，提高了结构的极限承载能力；加载速率对极限承载能力影响不大，不同的焊缝尺寸对极限承载能力均有不同程度的影响。U型激光焊接夹层板在压皱过程中夹芯屈曲、压皱变形，有效吸收冲击能量；压皱性能随焊缝尺寸的增加呈现小幅度增加，但焊缝尺寸变化较大会对压皱性能产生较大影响；焊缝简化处理方式计算得到的压皱性能较实际焊缝大，在有限元技术中两种焊缝简化处理方式可以通用。
U형격광한접협층판재함선방호결구설계중구유엄활적응용전경。문장기우비선성유한원연건Abaqus연구료격광천투한T형접두재만구재하작용하결구적변형특정화겁한승재능력，병대가재속솔、한봉척촌대겁한승재능력적영향진행료연구；연후연구료계급한봉적U형협층판적압추역학행위，병분석료천투한봉처리방식급한봉척촌삼수대압추성능적영향。결과표명：격광천투한T형접두재만곡변형모식하협심벽판지단여면판발생접촉，사득재하중신분배，제고료결구적겁한승재능력；가재속솔대겁한승재능력영향불대，불동적한봉척촌대겁한승재능력균유불동정도적영향。U형격광한접협층판재압추과정중협심굴곡、압추변형，유효흡수충격능량；압추성능수한봉척촌적증가정현소폭도증가，단한봉척촌변화교대회대압추성능산생교대영향；한봉간화처리방식계산득도적압추성능교실제한봉대，재유한원기술중량충한봉간화처리방식가이통용。
Laser-welded corrugated-U type-core sandwich panels (U-LASCOR) is wide application prospect in vessel protection. Based on the nonlinear finite element software Abaqus the deformation and ultimate strength of laser fully penetration welding T-jiont in the U-LASCOR under moment was researched. And the influence of the loading rate and the welds size was discussed. Then the crushing resistance performance of U-LASCOR was researched and the influence of the welds model methods and the welds size on the crushing behavior was researched. Results show that the contact between the shell surface and the core plate improves the ultimate strength of T-jiont. The loading rate has little influence on the ultimate strength, while different laser welds size have different influence. The core plates of U-LASCOR shows excellent energy absorption characteristic during the crushing behavior. The crushing resistance performance has lit-tle increase when the welds size increases; and the crushing resistance performance of the model with sim-plified welds is superior to laser welds model.