CAJ | 학술논문

针对深孔施工过程中钻杆接头螺纹拉脱、杆体拉断等问题,以非线性有限元理论为基础,运用大型通用有限元软件对不同扣型不同参数下绳索取心钻杆螺纹副在拉伸及拉扭条件下的抗拉脱能力进行了分析计算.研究结果表明,螺纹副锥度相同时,负角度梯形扣的抗拉脱能力最强,不对称梯形扣的抗拉脱能力次之;同一扣型条件下,锥角变小时,螺纹副拉脱力呈现出先降后升的变化趋势;对负角度梯形扣,随着负角度的不断增大,其抗拉脱能力有所增加;相对拉伸,拉扭条件下螺纹副受力较为复杂,其抗拉脱能力略有降低.
침대심공시공과정중찬간접두라문랍탈、간체랍단등문제,이비선성유한원이론위기출,운용대형통용유한원연건대불동구형불동삼수하승색취심찬간라문부재랍신급랍뉴조건하적항랍탈능력진행료분석계산.연구결과표명,라문부추도상동시,부각도제형구적항랍탈능력최강,불대칭제형구적항랍탈능력차지;동일구형조건하,추각변소시,라문부랍탈력정현출선강후승적변화추세;대부각도제형구,수착부각도적불단증대,기항랍탈능력유소증가;상대랍신,랍뉴조건하라문부수력교위복잡,기항랍탈능력략유강저.
Aiming at the problems such as pall-off of joint thread and breaking of rod, based on non-linear finite element method, the analysis and calculation of resistance to pull-off for deep hole wire-line drill rod with several types of thread under different working conditions was carried out by using finite element software. Results showed that barb trapezoidal thread performed best and buttress thread was better under the same thread taper; with smaller thread taper, the pull-off force showed upward trend after the fist under the same type of thread; with larger nega-tive angle, its resistance to thread pull-off was increased; compared with tension, pull-off force decreased slightly under the tension and torsion.