oil derrick

The natural frequency of oil derrick changes with the changing of the load it bears on, this character of oil derrick is the theoretical basis for establishing the dynamic evaluating method. In this thesis, inspired by J.

石油井架的固有频率随所受荷载的变化而变化这一特性，是建立石油井架承载能力动态测评方法的理论依据。

However, it is limited to do oil derrick and substructure experiment by many factors especially in the process of developing new products.

然而在井架及底座原型上进行各种试验研究会受到诸多因素的限制，尤其是在新产品的开发和研制过程中，更是难以实现。

Evaluation method based on the model modification for the oil derrick

基于模型修正的井架评定方法

Study on Damage Location of Oil Derrick Based on Wavelet and Neural Network

基于小波和神经网络的石油井架损伤定位研究

Wind-induced Response Analysis of Oil Rig Derrick Structure

石油钻机井架结构风振响应分析

This paper presents a method for double nonlinear analysis of the loading capacity of oil derrick steel structures.

本文对采油井架钢结构进行了非线性有限元分析。

Research on The Method for Evaluating The Carrying Capacity of Oil Derrick with Assistance of The Vibration Theory

应用振动理论测评石油井架承载能力的方法研究

Design mode of reliability for cross-sections of component parts of oil derrick

石油井架构件截面可靠性设计模式

Mechanical analysis of the oil derrick steel structures

钻采井架钢结构的力学分析

Experimental Study on Damage Identification of Oil Derrick Based on Wavelet Packet Analysis

基于小波包分析的石油井架结构损伤识别试验研究

Simulation model for ultimate bearing capacity of in-service oil drilling derrick

在役石油钻机井架极限承载仿真模型研究

In terms of the conception of mathematics, the structural modal is a characterization of vibration system, and the intrinsic vibration frequencies and modes concluded from the modal analysis of oil derrick are the important properties of the dynamic load borne by derrick.

从数学概念出发，系统的结构模态是振动系统特性的一种表征，石油井架模态分析所得出的固有频率和振型，是井架承受动态载荷时的重要特性。

Nonlinear analysis of the mechanical behaviour of oil derrick steel structures

采油井架钢结构非线性力学行为分析

The state-of-the-art studies are carried out in this thesis on the damage identification of oil derrick structures under ambient excitation conditions.

本文主要研究了环境激励情况下石油井架结构的损伤识别问题。

We put up at the surface an oil derrick.

我们就在那块地面上竖起一个井架.

An oil derrick is a necessary supporting frame, and plays an important role in oil production.

采油井架钢结构是钻采石油时所必需的支架结构，对油田生产起着重要作用。

Analysis of static strength and fatigue life of oil derrick for workover rig

修井机井架的静强度与疲劳分析

Application of portable total station instruments to steel structure installation of oil drilling-producing derrick

便携式全站仪在钻采井架钢结构安装中的应用

Safety testing and evaluation technology of in-service oil rig derrick in oilfield

油田在役石油井架安全检测及评价技术

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

决定了钻孔位置后，我们就在地面上竖起井架。

Load and loading reaction in reliability design of oil derrick

石油井架可靠性设计中的荷载与荷载效应

Two time domain methods of modal identification based on ambient excitation carried through damage recognition to JJ160/ 41-K oil derrick structural models, and the results also identified a comparison.

利用基于环境激励的两种时域模态识别方法对JJ160/41-K型石油井架结构模型进行损伤识别，并对识别结果进行比较。

JJ160/ 40-K oil derrick structural finite element modeling was built with ANSYS. Damage was simulated by changing the elasticity modulus. Modal analysis and dynamic response analysis is done at healthy condition and some damage condition. 3.

利用ANSYS软件建立JJ160/40-K型石油井架结构有限元分析模型，通过改变损伤部位的弹性模量来模拟结构损伤情况，并对结构完好状态和几种损伤状态进行模态分析和白噪声下时程响应分析。

A kind of automatic cleaning technical equipment centered on the technology of a high-pressure water jet was introduced in the paper. It is used for automatic cleaning of such large-volume units as oil derrick ( well repair vehicle).

介绍了一种以高压水射流技术为核心技术的自动清洗工艺装备，用于实现对油田作业井架（车）等大型设备进行自动化清洗。

The Research of Damage Identification Method of Oil Derrick Based on the Principal Component Analysis Measured Frequency Response Functions

基于实测频响函数主成分的石油井架损伤识别方法研究

Structure analysis of a refit open type oil derrick of a 600m towing drilling machine

改装500m拖装钻机开式井架的结构分析

In the dissertation, we also consider the safety evaluation method of causing wind vibration of the oil rig derrick.

探讨了钻机井架风致振动的安全评价方法。

The determination and calculation of reliability index for k type oil derrick.

K型石油井架可靠性指标的确定与计算。

Damage Identification Study of Oil Derrick Structure Based on Ambient Excitation

基于环境激励的石油井架结构损伤识别研究

The working characteristic of wire rope for well drilling, and the use conditions, structure, specification and production technology requirements of large diameter wire ropes for drill oil derrick base rising are analyzed.

分析钻井用钢丝绳的工作特点，钻机井架底座起升用粗直径钢丝绳的使用工况条件、结构、规格和生产技术要求；