中文摘要：

为研究井架钢结构在风载工况下的安全性能，利用有限元分析软件ANSYS建立井架钢结构数值模型，对井架钢结构在保全设备工况下背风向、侧风向、45。风向时以及停钻工况下背风向、侧风向、45。风向时的风荷载进行计算和安全性分析。结果表明：在保全设备工况下，井架钢结构位移和应力均满足安全准则；在停钻工况下，井架钢结构的顶部变形均大于许用的安全位移值；应力分析表明，在侧向风作用下，井架钢结构前后立柱之间的横杆所受到的应力大于许用的安全应力，导致井架钢结构的横杆不安全。对位移和应力的综合分析表明，需要增加井架钢结构杆件的尺寸或者对材料进行改进。在设计或对含损伤缺陷的井架钢结构进行安全性评估时，必须考虑风荷载的作用。

英文摘要：

In order to study the safety of derrick steel structure in wind loads, a numerical model was established by using finite element analysis software ANSYS. The wind loads were respectively calculated and safety evaluation was analyzed in the working conditions of equipment preservation and drilling halt with leeward, lateral and 45~ winds. The results show that the displacement and stress both satisfy the safety criterion in the working conditions of equipment preservation. The de- formation at the top of derrick steel structure is larger than the allowable safe displacement. Stress a- nalysis shows that in the working condition of drilling halt with lateral load, the stress of the cross beam between the front and the back derrick thigh is larger than the allowable safe stress, and the locate beam will be damaged. Comprehensive analysis of deformation and stress show that sectional dimension of member bars of derrick steel structure should be increased or material should be strengthened. Wind load effect must be considered in design or safety evaluation for derrick steel structures with damage and defacements.