| 摘要: |
| 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。 |
| 关键词: 井架 承载力 有限元计算模型 非线性分析 稳定系数 |
| DOI：10.11841/j.issn.1007-4333.2007.02.043 |
| 投稿时间：2006-11-05 |
| 基金项目: |
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| Finite element analysis on stability and load-carrying capability of steel tube derrick |
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| Abstract: |
| 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. |
| Key words: derrick,load-carrying capability,finite element computing model,nonlinear analysis,stability factor |
