CAJ | 학술논문

文中分别采用试验方法和有限元模拟的方法分析了不同尺寸、材料及初始缺陷的扣入式止屈器对管道屈曲的止屈效果，并得到了平行穿越及U型穿越两种穿越模式。在此基础上，文中还应用有限元方法研究了扣入式止屈器尺寸、材料及初始偏心缺陷对管道屈曲穿越扣入式止屈器模式及压力的影响，论证了管道屈曲分别随着扣入式止屈器长度及厚度的增加逐渐由平行穿越变为U型穿越，且穿越压力分别随着扣入式止屈器长度及厚度的增大而增大，并最终均趋于稳定；当扣入式止屈器材料屈服应力小的时候管道屈曲平行穿越扣入式止屈器，随着止屈器材料屈服应力的增大逐渐变为U型穿越，且穿越压力随之增大；管道的初始偏心缺陷使得管道屈曲更容易穿越扣入式止屈器，故应在制造及安装运营期间严格控制管道的偏心缺陷。
문중분별채용시험방법화유한원모의적방법분석료불동척촌、재료급초시결함적구입식지굴기대관도굴곡적지굴효과，병득도료평행천월급U형천월량충천월모식。재차기출상，문중환응용유한원방법연구료구입식지굴기척촌、재료급초시편심결함대관도굴곡천월구입식지굴기모식급압력적영향，론증료관도굴곡분별수착구입식지굴기장도급후도적증가축점유평행천월변위U형천월，차천월압력분별수착구입식지굴기장도급후도적증대이증대，병최종균추우은정；당구입식지굴기재료굴복응력소적시후관도굴곡평행천월구입식지굴기，수착지굴기재료굴복응력적증대축점변위U형천월，차천월압력수지증대；관도적초시편심결함사득관도굴곡경용역천월구입식지굴기，고응재제조급안장운영기간엄격공제관도적편심결함。
Based on the results of experiment and FEM, the paper obtains two propagation mode of parallel mode and U mode. Besides, it also studies on how the dimensions, material and shape of the slip-on arrestor affect the propagation pressure and propagation mode. The conclusion is that with the growth of length and thickness of slip-on arrestor, the propagation mode change from parallel mode to U mode and the propagation pressure increase as well. What's more, if the material of slip-on ar-restor changed, the propagation mode and propagation pressure changed following it. It also obtains a conclusion that a defect of pipeline will greatly lower the propagation pressure.