钢管井架稳定性能与承载力的有限元分析

对钢管井架的稳定性能和承载力进行有限元分析。建立了以非线性梁单元为基础的钢管井架有限元计算模型,采用有限元分析软件对其稳定性能进行计算,分析几种主要工程加强措施对井架整体稳定性的作用效果。计算结果表明:井架整体稳定系数约为单杆稳定系数的65%;井架高度、立杆根数(间距)和拉墙杆间距对井架极限承载力的影响很大,工程中可通过增加拉墙杆数量,减小横杆间距等措施提高井架的稳定性和承载力,进而增加井架的工作高度。

Finite element analysis on stability and load-carrying capability of steel tube derrick

The stability and load-carrying ability of a tubular steel derrick are the main parameters determining the safe-ty of a steel derrick.A finite element computing model based on the non-linear beam element was built.The stability of the tubular steel derrick was computed by computer.Furthermore,some methods for strengthening the stability of a derrick were analyzed.Results indicated that the stability factor of whole derrick is only65% as that of the single pole;the height of the derrick,amount of the poling and the distance between the tie wall rods have significant effect on load-carrying ability of a tubular steel derrick.In practice,by increasing the number of tie wall rod and decreasing the dis-tance between rails will strengthen the stability and load-carrying ability of a tubular steel derrick,thus the working height of a derrick will be increased.