CAJ | 학술논문

利用ANSYS对16万m3全容式液化天然气储罐金属内罐应力最大、最危险的大角焊缝区域建立参数化模型分析其安全性，通过计算得到了不同罐底边缘板厚度、边缘板外伸长度、焊缝内坡口尺寸以及内侧角焊缝焊脚长度的应力分布曲线。结果表明，在一定范围内改变以上4个尺寸，可以不同程度地改变其大角焊缝的最大应力和薄膜应力。据此给出了这4个尺寸的取值范围。
이용ANSYS대16만m3전용식액화천연기저관금속내관응력최대、최위험적대각한봉구역건립삼수화모형분석기안전성，통과계산득도료불동관저변연판후도、변연판외신장도、한봉내파구척촌이급내측각한봉한각장도적응력분포곡선。결과표명，재일정범위내개변이상4개척촌，가이불동정도지개변기대각한봉적최대응력화박막응력。거차급출료저4개척촌적취치범위。
In a liquefied nature gas (LNG)cryogenic tank with a volume of 160 thousand m3 , the shell-to-bottom fillet weld is one of the biggest stress and most dangerous areas .In order to analyze the security,using ANSYS to establish the parameterized model of shell-to-bottom fillet weld,and then through calculating,the stress distribution results and stress influencing curve of twenty three kinds of models are obtained under the situation of different thickness and overhang length of annular plate,different sizes of the inner weld bead bevel and the different lengths of fillet weld.The result shows that in a certain range,changing the sizes of the above four aspects can change the biggest stress and membrane stress of shell-to-bottom fillet weld at different lev-els,and at the same time giving the recommended value ranges of the four size.