石油矿场机械
石油礦場機械
석유광장궤계
OIL FIELD EQUIPMENT
2014年
9期
48-51
,共4页
锯齿形螺纹%连接强度%有限元%全尺寸试验
鋸齒形螺紋%連接彊度%有限元%全呎吋試驗
거치형라문%련접강도%유한원%전척촌시험
sawtooth thread%joint strength%finite element%full-scale test
通过有限元方法对锯齿形螺纹接头进行拉伸条件下破坏失效规律研究，同时对螺纹啮合长度和壁厚对连接强度的影响进行了分析，并通过全尺寸试验进行了验证。分析表明：锯齿形螺纹接头断裂强度高于滑脱强度，接头的拉伸失效破坏形式为断裂；螺纹啮合长度对锯齿形螺纹接头连接强度有较大影响；为了保证连接强度，应该上扣到位，保证螺纹啮合长度；管端壁厚和偏心对锯齿形螺纹接头连接强度有显著影响，建议应该控制最小壁厚和偏心度。
通過有限元方法對鋸齒形螺紋接頭進行拉伸條件下破壞失效規律研究，同時對螺紋齧閤長度和壁厚對連接彊度的影響進行瞭分析，併通過全呎吋試驗進行瞭驗證。分析錶明：鋸齒形螺紋接頭斷裂彊度高于滑脫彊度，接頭的拉伸失效破壞形式為斷裂；螺紋齧閤長度對鋸齒形螺紋接頭連接彊度有較大影響；為瞭保證連接彊度，應該上釦到位，保證螺紋齧閤長度；管耑壁厚和偏心對鋸齒形螺紋接頭連接彊度有顯著影響，建議應該控製最小壁厚和偏心度。
통과유한원방법대거치형라문접두진행랍신조건하파배실효규률연구，동시대라문교합장도화벽후대련접강도적영향진행료분석，병통과전척촌시험진행료험증。분석표명：거치형라문접두단렬강도고우활탈강도，접두적랍신실효파배형식위단렬；라문교합장도대거치형라문접두련접강도유교대영향；위료보증련접강도，응해상구도위，보증라문교합장도；관단벽후화편심대거치형라문접두련접강도유현저영향，건의응해공제최소벽후화편심도。
Tensile failure of sawtooth thread tubing connections was studied through finite element method.Thread engagement length and wall thickness influence on joint strength are analyzed and verified by full-scale test.Analysis shows that the fracture strength is higher than pullout strength of sawtooth thread tubing connection,and tensile failure mode is fracture streng th.Thread engagement length has great influence on joint strength of sawtooth thread connection.In order to ensure the joint strength,torque and thread engagement length may be increased.The average thickness and eccentricity has significant influence on joint strength of sawtooth thread connec-tion.In order to ensure joint strength,wall thickness and eccentricity should be controlled.
