井架

Oil derrick When it has been decided where we are going to drill, we put up at the surface an oil derrick.

当确定钻孔地点后，我们就在那里竖起一个井架。

Oil drilling derrick s are important constitutes of oil industry equipments, it belong to large bearing structure.

石油钻机井架是石油工业生产设备中的重要组成部分，属于一种大型承重结构，对油田生产起着重要作用。

Why do players have an interest in capturing the Oil Derrick or Cobalt Mine?

为什么玩家们要占领采油井架或钴矿？

Material;Welding;Oil derrick;Structure

材料；焊接；井架；结构

Finally, the method is demonstrated with some oil derrick.

首先，应用当量损伤系数作为判别损伤是否存在与程度大小的综合评价指标，建立了损伤刚度矩阵；其次，确定了应力与当量损伤系数之间的函数关系，推导了应力残差矩阵对当量损伤系数的灵敏度表达式；然后，构造了基于应力的目标函数，提出应用正算过程和优化方法反演识别当量损伤系数；最后，用该方法对某石油井架进行了损伤识别。

The method in this paper is verified through ANSYS, by using the finite element modal analysis. The calculation for the derrick of an oil drilling rig shows that the error is not exceeding 1\%.

通过ANSYS有限元分析对该估算方法进行了验证，并在石油钻机井架底座的有限元模态分析中应用该方法对系统固有频率进行了估计，误差均不超过1\%。

According to the mechanical behaviors of in-service oil drilling derrick,the simulation model for forecasting the ultimate bearing capacity of oil drilling derrick was established on the basis of the double nonlinear theory .

针对在役石油钻机井架的力学特征，建立了基于双重非线性理论的极限承载仿真模型。

Business scope mainly covers steel structure work of oil well derrick、power station、airport and etc.

经营范围涉及石油井架、场馆、大楼、桥梁、塔架、电厂、飞机场等钢结构工程。

Surging demand for oil has driven up oil-field costs by boosting demand for skilled labor, rigs and steel.

市场对熟练工人、井架和钢铁的旺盛需求推高了油田开采成本。

Mahindra coach Derrick Pereira said his team was in an upbeat mood to garner three points on the morrow.

Mahindra教练井架Pereira认为他的队是在一种欢乐的心情次日获取三点。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。