CAJ | 학술논문

在国外，激光焊接钢质夹层结构已用于实船，其连接构件的强度特性是尚待解决的关键问题之一。应用有限元分析软件ANSYS，研究2种典型连接构件的面外强度特性及灵敏度。计算中，为降低计算规模，采用MPC壳体连接和子模型分析技术；进行灵敏度分析时，为减少大量方案计算所需的繁琐人工操作，应用Matlab驱动ANSYS，以批处理方式的有限元分析计算各方案的响应值。计算结果显示，在普通焊接接头处存在一定的应力集中。在控制结构重量的条件下，若要降低接头的应力集中系数，对于内嵌方框型连接构件而言，增大连接构件长度和夹层端部面板长度最为有效，增大水平板厚度也有一定的作用；对于外接平板型连接构件而言，最有效的途径是增大连接构件的厚度，并选取合适的连接构件长度。
재국외，격광한접강질협층결구이용우실선，기련접구건적강도특성시상대해결적관건문제지일。응용유한원분석연건ANSYS，연구2충전형련접구건적면외강도특성급령민도。계산중，위강저계산규모，채용MPC각체련접화자모형분석기술；진행령민도분석시，위감소대량방안계산소수적번쇄인공조작，응용Matlab구동ANSYS，이비처리방식적유한원분석계산각방안적향응치。계산결과현시，재보통한접접두처존재일정적응력집중。재공제결구중량적조건하，약요강저접두적응력집중계수，대우내감방광형련접구건이언，증대련접구건장도화협층단부면판장도최위유효，증대수평판후도야유일정적작용；대우외접평판형련접구건이언，최유효적도경시증대련접구건적후도，병선취합괄적련접구건장도。
The laser welded steel sandwich structure has already been used overseas in real ships,where the strength of jointing elements between sandwich panels is one of the key design parameters. In this pa-per,the out-of-plane strength property and the sensitivity of two typical joints are studied using ANSYS. In order to reduce the computing scale,MPC shell-solid assembly and the sub model method are incorpo-rated into the finite element model. Also,to simplify the cumbersome manual operation needed for the com-putation of various design proposals,the Matlab complier is employed to drive ANSYS,allowing the re-sponse to every proposal to be calculated in the batch mode through finite element analysis. It is observed that stress concentration exists around the common welded joints;thus,with acceptable structural mass, several measures are proposed to decrease the corresponding stress concentration factor. Specifically,for joints with rectangular profiles,the most effective way is to largely increase the joint length as well as the end length of sandwich panels. Besides,increasing the horizontal plate thickness also has certain effects. Similarly,For cover plate joints,the joint thickness should be increased properly,and the joint length should be chosen carefully.