本科毕业设计（论文）
题
目 JJ450型井架设计及动力特性
分析
学生姓名 教学院系 专业年级 指导教师 单 位
学 号
机电工程学院
职 称 副教授
西南石油大学
完成日期 2015年06月
Southwest Petroleum University
Graduation Thesis
Design and Dynamic Analysis of the JJ450 Derrick
Grade: 2011
Name:
Speciality: Mechanical engineering and automation
Instructor:
Mechanical and electrical engineering
2015-6
JJ450型井架设计及动力特性分析
摘要
井架，在整个钻井采油过程中扮演着非常重要的角色，主要作用包括安放天车，游车等起升设备，同时还担负着承受各种各样的载荷的作用。JJ450型井架的主要参数包括：游动系统为12绳时,最大钩载4500 kN；游动系统为10绳时,最大钩载为4236 kN；游动系统为8绳时,最大钩载为3916 kN。允许最大风速为55 m/s,井架高为46749 mm。井架顶部尺寸为3000 mm×2800 mm。井架下底尺寸为9476 mm×5822 mm；二层台高度为26238mm～2755 mm；二层台立根容量( 127mm(5英寸)钻杆,28 m立根)6040 m。本次设计的井架主体为五段焊接件的组装，段与段之间采用耳板销钉定位，螺栓连接，这样的结构既能缩短安装的时间，又能方便运输转移。本设计主要分为建模与动力特性分析。建模过程主要采用PTC CREO中的EFX模块，具体步骤包括先建骨架，再转换成钢结构，处理接头，焊接，最后组装，得出完整的井架简图。动力特性分析主要借助ansys workbench对井架进行模态分析。具体步骤为先将模型导入workbench中，再划分网格，进行分析，最后对结果进行分析。通过上述过程掌握建模和运用Workbench分析模型的方法，最后得到模型的前6阶固有频率（2.4911Hz、3.6809 Hz、7.4687 Hz、8.6061 Hz、8.9593 Hz、9.7633 Hz）及其振型振型，得出井架在实际工程中工作载荷应避免在上述几个频率范围内，从而避免发生共振的结论。
关键词：JJ450型井架；海洋钻机；Pro/E EFX；钢结构；ansys workbench
Abstract
Oil derrick is an important part of oil rig derrick in the drilling process plays a crucial role, can be used for placing a crane, travel car up lifting equipment, shoulders bear the reuse of various working loads. JJ450 type oil derrick the main parameters of including 12 rope hoisting system, the maximum hook load 4500 kn; 10 rope hoisting system, the maximum hook load of 4236 kn; hoisting system for cable, maximum hook load of 3916 kn. Maximum wind speed of 55 m/s, derrick height of 46749 mm. The top of the derrick is 3000 mm * 2800 mm. The bottom size of the derrick is 9476 mm * 5822 mm; the height of the two bed is 26238mm ~ 26543 mm; the two story stand is (127mm (5 inch) drill rod, and 28 mm).The design of the derrick body structure is assembled by using five sections of the welded components, component between the conical pin connection, such a structure can not only shorten the installation time and convenient transport. This design is mainly divided into modeling and dynamic analysis. Modeling process mainly adopts PTC Creo EFX module and concrete steps including first built skeleton, then converted into steel structure, joint processing, welding, final assembly, complete derrick diagram is obtained. The analysis of the derrick is carried out by workbench ANSYS.. The specific steps of the model into workbench, then divided the grid, analysis, and the results of the final analysis. Through the above process to master modeling and using the workbench model analysis method, finally get the model front six order natural frequency (2.4911Hz, 3.6809 Hz, 7.4687 Hz, 8.6061 Hz, 8.9593 Hz, 9.7633 Hz) and modal vibration type, it is concluded that the derrick in actual engineering work load should be avoided in the frequency range, so as to avoid the resonance of the conclusion.
Keywords: JJ450 derrick; offshore rig; Pro/E EFX ; steel structure; ANSYS Workbench
1 绪论.......................................................................................................................................... 1
1.1 概述 .................................................................................................................................. 1 1.2 国内外的现状 .................................................................................................................. 1 1.3 井架发展趋势 ................................................................................................................. 2 1.4 井架分析现状 ................................................................................................................... 3 1.5 井架的主要类型 ............................................................................................................... 4 1.6 JJ450型井架简介 .............................................................................................................. 5 1.7 本课题主要内容 ............................................................................................................... 5
本章小结 .......................................................................................................................... 6
2 井架的结构方案及布局设计 .................................................................................................. 6
2.1 井架结构的确定 ............................................................................................................... 6
2.1.1 井架立面形式的确定 ............................................................................................ 6 2.1.2 井架斜撑布置方式的确定 .................................................................................... 6 2.3 井架材料的选择 ............................................................................................................... 8 2.4结构说明 .................................................................................................................................... 8
2.4.1井架主体 ................................................................................................................. 8 2.4.2二层台 ..................................................................................................................... 9 2.4.3人字架 ..................................................................................................................... 9 2.5井架构件截面的选择 ........................................................................................................ 9 2.6 井架杆件结构的确定 ..................................................................................................... 10 2.7 井架结构简图 ................................................................................................................. 10 2.8 井架主体尺寸 ................................................................................................................. 11
本章小结 ........................................................................................................................ 11
3 井架的主要参数确定及相关载荷分析与计算[8] ................................................................... 12
3.1井架参数 .......................................................................................................................... 12 3.2计算方法 .......................................................................................................................... 13 3.3井架的结构静载 .............................................................................................................. 13 3.4立根载荷 .......................................................................................................................... 13 3.5 大钩最大静载 ................................................................................................................. 13 3.6二层台的计算设计 .......................................................................................................... 14 3.7立根风载计算 .................................................................................................................. 15 3.8风载计算 .......................................................................................................................... 16
本章小结 ........................................................................................................................ 20
4 井架连接处销轴、耳板的设计 .............................................................................................. 20
4.1 井架与井架底座连接处销轴耳板的设计 ..................................................................... 20
4.1.1销轴的计算设计 ................................................................................................... 20 4.1.2 耳板设计 .............................................................................................................. 21 4.2 人字架与井架主体连接处销轴与耳板的设计 ............................................................. 23
4.2.1 销轴的设计 .......................................................................................................... 23 4.2.2耳板的设计 ........................................................................................................... 23 4.3 井架各主体的销轴、耳板的设计 ................................................................................. 25
4.3.1 销轴的设计 .......................................................................................................... 25