中文摘要：

通过建立K型井架有限元模型，对设计载荷作用下井架的变形位移及应力分布情况进行了仿真分析。分析结果表明，K型井架承载过程中结构形状的变化将导致井架顶端产生前倾位移，最大位移量可达41mm；井架最大应力发生在井架上段与中上段连接处。基于有限元分析确定的井架承载主要危险应力区，结合SY／T6326-2008标准要求确定了K型井架检测方案中应变片的选择及测点规划布置，制定出符合标准要求的井架强度检测实施方案，这对井架安全检测评定具有一定的参考价值。

英文摘要：

Through establishment of the finite element model of K-shaped derrick, a simulation analysis of the detormation displacement and stress distribution of derrick under the effect of designed load was conducted. The analysis shows that the change of structural form in the loading process of K-shaped derrick will cause forward-tilting displacement at the top of derrick. The maximum displacement can reach 41 mm. The maximum stress of den＇ick occurs at the upper section of derrick and at the connection between the upper and middle sections of derrick. On the basis of the main dangerous zone of derrick loading determined by finite element analysis, in combination of the re- quirement of the SY/T 6326--2008 standard, the selection of strain gauge and the arrangement of measuring point were determined in the detection scheme for K-shaped derrick. The implementation scheme of derrick strength deteetiun was made in agreement with the standard requirement. This can serve as a reference for the inspection and safety evaluation of the derrick.