摘 要
艦艇管路系統(tǒng)的抗沖擊安全性能是其生命力要素的重要組成部分，因此對艦艇管路的抗沖擊仿真評估分析方法的需求也十分迫切。本文基于時域分析法，采用元器件局部模型與整體模型的嵌套技術(shù)，基于有限元分析方法提出典型管路系統(tǒng)抗沖擊性能仿真方法，并通過模型試驗對此方法的仿真精度進(jìn)行驗證，在此基礎(chǔ)上對典型管路系統(tǒng)管路段的抗沖擊性能進(jìn)行了分析，分析了管路設(shè)計與安裝因素對抗沖擊性能的影響，并給出具體建議。本文主要研究工作如下：
（1）建立了典型管路元器件局部細(xì)化有限元模擬方法，發(fā)展了管路系統(tǒng)的整體有限元建模技術(shù)。在典型管路元器件局部有限元建模技術(shù)的基礎(chǔ)上，采用有限元軟件，根據(jù)管路布設(shè)特點設(shè)置邊界，采用局部結(jié)構(gòu)細(xì)化，整體模型網(wǎng)格合理劃分的有限元整體建模技術(shù)，對典型管路系統(tǒng)進(jìn)行建模，通過有限元計算分析，獲得典型管路系統(tǒng)的整體動力特性，計算效率較高。
（2）基于時域分析法和有限元分析技術(shù)建立了仿真精度較高的典型管路系統(tǒng)抗沖擊性能仿真方法，并通過模型試驗對該方法的仿真精度進(jìn)行驗證。在管路系統(tǒng)抗沖擊性能時域分析方法基礎(chǔ)上，采用邊界條件等效、關(guān)鍵部位細(xì)化、弱連接部位接觸的處理方法，建立了仿真精度較高的管路系統(tǒng)抗沖擊性能仿真方法。根據(jù)實驗條件，較全面的考慮了管路元器件、管路彎頭、管路支吊架的設(shè)置等元器件連接方式對抗沖擊性能的影響，設(shè)計了典型空間管路試驗?zāi)Ｐ筒⒃跊_擊試驗臺上進(jìn)行了沖擊試驗，將試驗數(shù)據(jù)與數(shù)值模擬計算結(jié)果進(jìn)行對比分析，驗證了數(shù)值模擬方法的計算精度。
（3）針對典型管路系統(tǒng)管路段，建立其有限元分析模型，分別對該管路系統(tǒng)的橫向、縱向、垂向抗沖擊性能進(jìn)行分析，給出抗沖擊薄弱環(huán)節(jié)，并提出了改進(jìn)建議。
（4）通過數(shù)值分析，給出了管路系統(tǒng)抗沖擊性能的主要影響因素及提高管路系統(tǒng)抗沖擊性能的建議。針對管路系統(tǒng)的不同減振方式、布設(shè)、支撐方式，位置、管路穿艙方式、連接方法對管路抗沖擊性能的影響，進(jìn)行了垂向、橫向、縱向抗沖擊性能的數(shù)值仿真計算，給出了管路系統(tǒng)抗沖擊性能的主要影響因素，并對提高管路系統(tǒng)的抗沖擊性能提出一些建議。

關(guān)鍵詞 管路系統(tǒng)；抗沖擊；時域分析法；船舶



Abstract
The shock resistance performance of shipboard pipeline system is very important to survivability of ship, so it is an exigent demand for simulation and eva luation method for shock resistant of typical pipeline system. Based on the time domain analysis method, a simulation method for shock resistant of typical pipeline system is introduced by nesting technique of local model and integrated model and FE method. Simulation precision of FE method is also verified from model test. On that basis, shock resistances of typical pipe segments of the pipeline systems are eva luated. The effects of pipeline design and installation factors on pipe shock resistance performance are studied. And some specific advice is given. The main contents of this paper are listed as follows:
(1) The paper established FE method of partial thinning mesh for typical components of pipeline. The integral finite element modeling technology is developed. On the basis of FE method of partial thinning mesh for typical components of pipeline, according to FE modeling technology with reasonable grid, the model of pipeline which boundary is set up by the characteristics of pipeline’s layout is established by the finite element software ANSYS. Integral dynamic characteristic of typical pipeline system is obtained with higher calculating efficiency through FE method.
(2) On the basis of the time domain analysis method and FE method analysis technology, simulation method with high efficiency for shock resistance of typical pipeline system is established and simulation accuracy of the method is also verified from model test. Based on the time domain analysis method for shock resistance of pipeline system, simulation method with high efficiency for shock resistance of typical pipeline system is developed by the treatments such as the equivalent boundary conditions, key parts of refinement, and weak joints of contact element. Typical spatial pipeline test model is designed and carried out in shock platform. The calculation precision of simulation method is verified by the comparative analysis between test data and the numerical simulation result.
(3) Finite element analysis models of the pipeline segments are established. The three pipe’s shock resistance performance which contains transverse, longitudinal and vertical are eva luated. Weak link and improvement suggestions of shock resistance is given.
(4) The main influential factors and the suggestions of improving shock resistance of pipeline system are given by numerical analysis. Taking the factors that affect shock resistance performance of pipeline system such as different way of piping system vibration, layout, support pattern, location, pipeline penetrating way, connecting method, numerical models into account, the pipes’ shock resistances performance which contains transverse, longitudinal and vertical are calculated. Then the main influential factors and the suggestions for improving shock resistance of pipeline system are given.

Keywords Pipeline system; Shock resistance; time-domain analysis; ships

目錄
摘 要 I
Abstract II
第1章 緒 論 1
1.1 研究背景及研究意義 1
1.2 管路系統(tǒng)抗沖..