CAJ | 학술논문

基于ANSYS有限元分析软件对具有装配型和宽扁型2种特殊肋骨型式的耐压壳体进行强度与极限承载能力分析。针对装配型肋骨的耐压壳体，对比其与传统加筋圆柱壳的强度特性，分析其在不同载荷下的应力分布，以及肋骨与壳体之间的装配间隙对极限承载能力的影响；针对宽扁型肋骨的耐压壳体，分别采用体单元和壳、梁单元进行有限元模拟，分析2种建模方式下结构强度及极限承载能力计算结果的差异性。计算结果表明：具有装配型肋骨的耐压壳体，外载荷与结构应力之间存在非线性关系，装配间隙越小，极限承载能力越强；具有宽扁型肋骨的耐压壳体，2种建模方式对其强度结果有一定的影响，而对极限承载能力的结果影响不大。
기우ANSYS유한원분석연건대구유장배형화관편형2충특수륵골형식적내압각체진행강도여겁한승재능력분석。침대장배형륵골적내압각체，대비기여전통가근원주각적강도특성，분석기재불동재하하적응력분포，이급륵골여각체지간적장배간극대겁한승재능력적영향；침대관편형륵골적내압각체，분별채용체단원화각、량단원진행유한원모의，분석2충건모방식하결구강도급겁한승재능력계산결과적차이성。계산결과표명：구유장배형륵골적내압각체，외재하여결구응력지간존재비선성관계，장배간극월소，겁한승재능력월강；구유관편형륵골적내압각체，2충건모방식대기강도결과유일정적영향，이대겁한승재능력적결과영향불대。
In this paper,the strength and ultimate carrying capacity of cylindrical shells with assem-bly-type ribs and with flat ribs are calculated respectively using the finite element method. The difference in strength between these two types of shells is studied. The stress responses at three typical positions on the shell with assembly-type ribs are calculated for different loads,and the effect of the assembly gap on the ultimate carrying capacity is also analyzed. Then,for the cylindrical shell with flat ribs,the difference of strength and ultimate carrying capacity results by using different modeling methods are investigated. Sim-ulation results show that the non-linearity relationship between the pressure and stress can be clearly ob-served for the cylindrical shell with assembly-type ribs;specifically,the smaller the assembly gap is,the larger the ultimate carrying capacity becomes. Meanwhile,for cylindrical shells with flat ribs,the effect of computational modeling on strength,either being Solid elements only or the combination of Sshell and Beam elements,is quite obvious,while that on the ultimate carrying capacity is negligible.