CAJ | 학술논문

在役的液化石油气球罐缺陷以裂纹为主，且内表面裂纹占很大比重。运用有限元软件，分析了球罐内表面横向裂纹和纵向裂纹对球罐强度的影响。结果表明，在其他条件相同情况下，同一位置的横向裂纹比纵向裂纹对球罐的危害性大。横向裂纹深度越深，危险性越大；长度越长，危害性反而越小。研究结果对在役带裂纹缺陷的液化石油气球罐的安全使用和评定具有实际意义。
재역적액화석유기구관결함이렬문위주，차내표면렬문점흔대비중。운용유한원연건，분석료구관내표면횡향렬문화종향렬문대구관강도적영향。결과표명，재기타조건상동정황하，동일위치적횡향렬문비종향렬문대구관적위해성대。횡향렬문심도월심，위험성월대；장도월장，위해성반이월소。연구결과대재역대렬문결함적액화석유기구관적안전사용화평정구유실제의의。
The defects in the use of LPG tank are mainly cracks,and the inner-surface cracks accounted for a large proportion. In this paper,the influence of the transverse and longitudinal cracks in the spherical tank inner surface on the strength is analyzed by finite element analysis software. The results show that under the same conditions,the transverse crack is larger than the longitudinal cracks in the same position. The deeper transverse cracks,the grea-ter the risk;the longer length,but the smaller the dangers. The results of the study are of practical significance for the safe use and evaluation to take crack defects of liquefied petroleum gas spherical tank in service.