本文選題：油氣管道 + 整體式絕緣接頭��； 參考：《中國(guó)科技論文》2017年04期

【摘要】：整體式絕緣接頭是油氣管道的薄弱環(huán)節(jié),因密封失效而導(dǎo)致油氣泄漏是絕緣接頭的主要失效形式。通過(guò)ABAQUS軟件建立整體式絕緣接頭的有限元模型。采用熱膨脹法施加預(yù)緊力,對(duì)比分析了整體式絕緣接頭在不同軸向拉力和外彎矩作用下的密封可靠性。通過(guò)分析得出:彎矩作用下,絕緣接頭一側(cè)受拉,另一側(cè)受壓。在受壓側(cè),絕緣墊板受到左右法蘭的擠壓作用,產(chǎn)生明顯的應(yīng)力集中。在受拉側(cè),絕緣接頭的失效形式與軸向拉力作用下的失效形式基本相同,即最大應(yīng)力首先在勾圈中間部位達(dá)到屈服極限,隨變形量的增加,左右法蘭端面形成間隙,從而引起密封圈壓縮量減小,最終導(dǎo)致油氣泄漏。
[Abstract]:Integral insulation joint is the weak link of oil and gas pipeline. Oil and gas leakage caused by seal failure is the main failure form of insulation joint.The finite element model of integral insulation joint is established by ABAQUS software.The sealing reliability of integral insulating joints under different axial tensile forces and external bending moment was analyzed by means of pretightening force applied by thermal expansion method.It is concluded that under the action of bending moment, one side of the insulating joint is pulled and the other side is compressed.On the compression side, the insulating gasket is extruded by the left and right flanges, resulting in obvious stress concentration.At the tension side, the failure form of the insulating joint is basically the same as that under axial tension, that is, the maximum stress first reaches the yield limit in the middle of the hook ring, and with the increase of deformation, the gap between the left and right flange ends is formed.Therefore, the compression of the seal ring is reduced, and the oil and gas leakage is finally caused.
【作者單位】： 中國(guó)石油大學(xué)(北京)機(jī)械與儲(chǔ)運(yùn)工程學(xué)院;中國(guó)石油集團(tuán)渤海鉆探工程有限公司第五鉆井工程分公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51309237) 高等學(xué)校博士學(xué)科點(diǎn)專(zhuān)項(xiàng)科研基金資助項(xiàng)目(20130007120008) 中國(guó)石油大學(xué)(北京)科研基金資助項(xiàng)目(01JB0401)
【分類(lèi)號(hào)】：TE973

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