本文關鍵詞： 蜂窩夾層板 等效仿真 ANSYS 輕艙壁　出處：《中國海洋大學》2014年碩士論文　論文類型：學位論文

【摘要】：面對當今人類社會對節(jié)能減排的提倡，以及國際海事組織提出的“新船能效設計指數(shù)”要求所帶來的壓力，全世界造船業(yè)都在努力實現(xiàn)船舶的低燃油消耗、低污染、高運輸效率。在保證船舶強度的前提下，通過減少船舶自重、實現(xiàn)船舶輕量化來提高船舶運輸效率已經(jīng)成為國際航運界的共識。 輕艙壁是一種廣泛應用在船舶與海洋工程上層建筑中的艙壁結(jié)構(gòu)形式，一般只起簡單的間隔作用，具有一定的剛性。而蜂窩夾層板作為一種輕型復合材料，具有彎曲剛度大、強度高、穩(wěn)定性好、隔聲隔熱效果好等特點。本文探討用蜂窩夾層板替代船舶與海洋工程上層建筑中的傳統(tǒng)輕艙壁結(jié)構(gòu)，以此來達到一定的減重目的。目前蜂窩夾層板主要是在一些船舶特殊結(jié)構(gòu)和特殊船型的建造中得到使用，還未在造船領域得到廣泛應用的一部分原因是對蜂窩夾層板在實際工程中的應用研究仍然不夠充分，需要確定出合理可靠的靜力分析方法應用于工程實際。而蜂窩夾層板結(jié)構(gòu)由于其芯層細觀結(jié)構(gòu)較多，工程實際中無法完全按照三維實體模型進行有限元分析。因此，有必要對蜂窩夾層板的等效仿真方法進行探討。 本文采用理論分析、物理模型試驗和有限元仿真相結(jié)合的方法，對蜂窩夾層板的等效仿真方法進行了研究，對比分析了基于三種等效理論的等效仿真方法，并初步分析了蜂窩夾層板替代船舶與海洋工程上層建筑中傳統(tǒng)輕艙壁的減重效果，主要工作如下： 首先對比分析了多位學者推導的蜂窩芯層等效力學參數(shù)公式，并聯(lián)系實際應用進行了總結(jié)。然后介紹了目前常用的三種蜂窩夾層板等效理論，即等效板理論、蜂窩板理論、三明治夾芯板理論，為之后的等效仿真方法對比分析提供了理論支持。 為了驗證蜂窩夾層板有限元三維實體模型的仿真效果，本文對蜂窩夾層板試樣進行了三點彎曲試驗，試驗模型與仿真模型相應測點的應力和撓度誤差較小，認為蜂窩夾層板三維實體模型可以作為驗證等效仿真方法準確性的標準。 將三種蜂窩夾層板等效理論分別與ANSYS有限元軟件中的殼單元結(jié)合使用，以三維實體模型仿真結(jié)果作為標準，對比分析三種等效仿真方法在蜂窩夾層板靜力分析中的仿真效果，并全面驗證了基于三明治夾芯板理論的等效仿真方法的可靠性。 利用仿真方法將蜂窩夾層板與傳統(tǒng)輕艙壁結(jié)構(gòu)的力學性能進行初步的對比分析，通過調(diào)整蜂窩夾層板的芯層高度和面板厚度，使其能夠在強度和剛度方面與傳統(tǒng)輕艙壁結(jié)構(gòu)達到等效，滿足替代要求，并分析其減重效果。算例分析結(jié)果表明，，用蜂窩夾層板替代傳統(tǒng)輕艙壁結(jié)構(gòu)可以起到較好的減重效果。
[Abstract]:In the face of today's human society to promote energy saving and emission reduction, and put forward the International Maritime Organization "new ship energy efficiency design index requirements of the pressure brought to the world shipbuilding industry in efforts to achieve low fuel consumption and low pollution, ship, high transport efficiency. Under the premise of ensuring the strength of the ship, by reducing the ship weight, implementation lightweight ship to improve transport efficiency has become the consensus of the international shipping industry.
Light is a kind of widely used bulkhead bulkhead structure in the form of superstructure of ship and marine engineering, just a simple interval effect, has certain rigidity. The honeycomb sandwich plate as a kind of lightweight composite materials, flexural rigidity, high strength, good stability, the characteristics of sound insulation and heat insulation effect is good in this paper. To explore the traditional light bulkhead plate instead of ship and ocean engineering superstructure with honeycomb sandwich, in order to achieve the purpose of weight loss to some extent. At present the honeycomb sandwich plate is mainly in the construction of some special structure and special ship ship was to use, yet in shipbuilding field get a part of the reason is widely used in research and application of the honeycomb sandwich plate in practical engineering is still insufficient, need to determine a reasonable and reliable static analysis method is applied to the engineering practice. The honeycomb sandwich structure because of its core layer meso There are many structures. In engineering practice, finite element analysis can not be carried out according to the three-dimensional solid model. Therefore, it is necessary to discuss the equivalent simulation method of honeycomb sandwich panels.
This paper based on theoretical analysis, physical model test method and finite element simulation with the equivalent simulation method of honeycomb sandwich panel were studied. The comparative analysis of the three kinds of equivalent simulation method based on equivalent theory, and analyzes the effect of weight loss of honeycomb sandwich plates to replace traditional light bulkhead ship and ocean engineering in superstructure the main work is as follows:
Based on the comparison of formula of equivalent mechanical parameters of honeycomb core layer is a number of scholars, and practical applications are summarized. Then this paper introduces three kinds of commonly used honeycomb sandwich equivalent theory, namely the equivalent plate theory, honeycomb plate theory, sandwich plate theory, provides a theoretical support for comparative analysis of equivalent simulation method for the following.
In order to verify the simulation effect of the honeycomb sandwich plate three-dimensional finite element model, the honeycomb sandwich specimens were three point bending test, model and simulation model of the corresponding measuring point stress and deflection error is small, that the honeycomb sandwich plate 3D model can be used to verify the accuracy of equivalent simulation method.
Three kinds of honeycomb sandwich plates were used in combination with the theory of the equivalent shell element of finite element software ANSYS, the simulation result of 3D entity model as a standard, comparative analysis of simulation results of three equivalent simulation method in the analysis of the honeycomb sandwich plate in static, and fully verify the reliability of the equivalent simulation method based on the theory of sandwich plate.
The simulation of mechanical properties of honeycomb sandwich plate and the traditional light bulkhead structure analyzed by adjusting the contrast of the honeycomb sandwich plate core height and the thickness of the panel, which can achieve the equivalent in strength and stiffness with the traditional light bulkhead structure, meet the alternative requirements, and to analyze the effect of weight loss example. The analysis results show that the honeycomb sandwich plates used to replace the traditional light bulkhead structure can play a better effect of weight loss.

【學位授予單位】：中國海洋大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U663.4

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