LS-DYNA有压容器抗侵彻能力研究
关键词：压力管道；冲击；穿透；极限穿透速度
毕业论文设计说明书外文摘要
Title Anti - penetration capability analysis of pressure vessels
Abstract
Pressure pipe is the most common pressure vessel, which is widely used in all aspects of life, the impact damage after filling medium leakage will cause great harm,the research of the impact factors of the pipeline damage is important to the pressure piping design and protection. Based on pressure pipeline under the action of transverse impact prefabricated fragment deformation and failure process of the internal pressure were analyzed under the action of circular tube to stress relationship, establish the theoretical model of the pipe deformation and failure; At the same time, based on the finite element software LS-DYNA, fragment was studied through the limit of pressure piping penetration speed and its influence, and experimental verification. Research shows that: the pipe wall thickness and broken the long diameter ratio is the main factors influencing the limit penetration rate, the greater the wall thickness limit penetration rate, the greater the length to diameter ratio, the greater the limit penetration rate is smaller; Round head to play better than flat nose has strong penetration ability; The existence of the filling pressure weakens the pressure in the pipeline resistance to impact load capacity.
Keyword pressure piping shock strike limit perforating velocity
目 次
1 绪论 1
1.1引言 1
1.2国内外研究现状 1
1.2.1国外研究现状 1
1.2.2国内研究现状 2
1.3 本文研究内容 3
1.3.1本文主要研究内容 3
1.3.2本文主要工作 3
2 理论分析 5
2.1管道应力分析 5
2.1.1.内压作用下薄壁圆管中的应力分布 5
2.1.2内压作用下厚壁圆筒中的应力分布 6
2.2.穿透破坏模式与经验公式 6
2.3动量与能量守恒模型 7
2.3.1.动量守恒 7
2. 3.2 动量守恒 9
2.4 本章小结 9
3 圆柱破片侵彻圆管过程仿真计算 10
3.1 仿真软件介绍 10
3.1.1 LS-DYNA软件介绍 10
3.1.2 LS-DYNA基本算法介绍 10
3.2 仿真模型的建立 11
3.2.1平头圆柱破片侵彻管道过程仿真计算 11
3.2.2圆头圆柱破片侵彻管道过程仿真计算 15
3.2.3不同长径比圆柱破片侵彻管道过程仿真计算 17
3.2.4平头弹冲击不同内压管道 19
3.3试验验证 21
3.3.1引言 21
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