Three methods are used in this paper, model test method, simplified analytical method and numerical simulation to research the collision performance of T-joints。 The main work includes: 

1。 The drop tests of T - joints have been conducted。 The impact force, impact process and deformation conditions acquired from experiments have been analyzed and discussed。 The rules showing the influence of and impact height on structural dynamic response have been acquired。

2。 Based on drop tests of T-joints, correlative simulation analysis has been developed。 Compared with calculation results and experimental data, numerical simulation analysis technology has been improved and confirmed。 Based on the results form numerical calculations, the structural deformation mechanism in typical moments has ben analyzed。 The influences of impact velocity and impact mass on collision responses of T-joints have been discussed。 

3。 Based on the injury of model test specimens, the deformation modes of T-joints have been proposed。 And based on the theory of plasticity, the analytical formula of energy dissipation have been derived using analytical methods。 Compared with analytical results and numerical results, analytical calculation has been confirmed。

Keywords: jack-up offshore platform; collision; T - joints; test; analytical method; numerical simulation

目录

第一章 绪论 1

1。1 研究背景与意义 1

1。2 国内外研究现状和方法 2

1。2。1 解析计算方法 2

1。2。2 基于有限元方法的数值仿真 3

1。2。3 试验方法 4

1。3 本文的主要内容 4

第二章 塑性力学理论及有限元方法 6

2。1 引言 6

2。2 塑性力学原理 6

2。2。1 塑性力学简介 6

2。2。2 界限定理及虚功原理 7

2。3 有限元方法的简介 8

2。3。1 有限单元法概述 8

2。3。2 ABAQUS的简介 8

2。4 小结 9

第三章 T型管节点落锤冲击试验及仿真分析 10

3。1 冲击试验引言 10

3。2 落锤冲击模型试验方案 10

3。2。1 试件材料及尺寸设计 10

3。2。2 测量对象 12

3。3 模型试验结果分析 14

3。4