毕业论文移动版

摘要：船舶管路的抗冲击安全性能是船舶生命力和战斗力的重要组成部分。本文针对异径管路、弯管管路、三通管路以及法兰闸阀管路这四种典型船舶管路，基于有限元分析技术建立了时域仿真方法，分析了在不同边界及约束情况下，船舶管路抗冲击性能的变化，总结了管路薄弱区域及抗冲击影响因素，并通过试验和理论算法验证了船舶管路抗冲击规律。本文主要做了以下几方面的工作：

（1）总结船舶典型管路抗冲击分析方法，主要分为实船水下爆炸试验和数值仿真试验方法。随着理论研究及计算机技术的不断发展，数值仿真越来越值得重视及运用，其主要分为在频域内描述冲击的冲击谱分析法和在时域内描述冲击的时域分析法。

（2）本文船舶管路时间历程冲击载荷表示方法采用基于德国BV043/85标准的三角波形简化方法，通过时域分析，获得了典型管路的动力特性，校核了其结构强度，总结了其薄弱区域。

（3）分析典型管路在不同的连接方式、支架弹性刚度和支架距管件距离情况下的抗冲击性能，总结其抗冲击影响因素。

（4）通过试验和理论算法对典型管路进行抗冲击的规律性验证，证明本文时域数值模拟等效约束条件的科学性和模拟所得结论的有效性。

关键词：船舶管路；管路抗冲击；时域仿真

Abstract：The shock resistance safety performance of ship pipeline is an important part of ship's survivability and combat effectiveness. According to the diameter pipe, elbow pipe, three-way pipe and flange valve pipe of the four different typical ship pipes, time domain simulation method is established based on the finite element analysis technology. The change of shock resistance of ship pipeline under different boundary and constraint conditions is analyzed and the weak area of pipeline and the influence factors of shock resistance are summarized. The impact resistance of  ship  pipeline  is  verified  by  experiments  and  the  theoretical algorithm .The main work of this paper is as followed:

（1）The  method  of shock  resistance  analysis  of typical  ship  pipelines  is summarized,

which is pided into real ship underwater explosion test and numerical simulation  test method. Numerical simulation is becoming more and more important with the continuous development of theoretical research and computer technology. Numerical simulation is pided into frequency domain shock spectrum analysis method and time-domain analysis method for describing shock in time domain.

（2）In this paper, a simplified method of triangle waveform based on German BV043/85

standard is adopted to represent the time history of ship pipeline. Through time domain analysis, the dynamic characteristics of typical pipelines are obtained, their structural strength is checked and their weak areas are summarized.

（3）The  shock resistance of typical pipelines under different connection modes,  support

elastic stiffness and distance between supports and fittings is analyzed. The impact factors of impact resistance are summarized.

（4）The regularity of the impact resistance of typical pipelines is verified by experiments and theoretical algorithms. The validity of the numerical simulation of equivalent constraint conditions and the effectiveness of the simulation results are proved.

Keywords: Ship piping ; Shock resistance ; Time domain simulation

目 录

第一章绪论 1

1.1本课题研究背景和意义 1

1.2船舶管路抗冲击国内外研究现状 (责任编辑：qin)