本文關(guān)鍵詞： 一體化蜂窩板 有限元 體積比強(qiáng)度 參數(shù)優(yōu)化 正交設(shè)計　出處：《東南大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：蜂窩板(蜂窩夾層結(jié)構(gòu))是一種典型的輕質(zhì)高強(qiáng)結(jié)構(gòu),具有抗震、隔音、隔熱等優(yōu)點(diǎn),已經(jīng)廣泛應(yīng)用于交通、航空、建筑等行業(yè)。近年來,在地震和洪水等自然災(zāi)害的應(yīng)急工程中多有應(yīng)用,包括架設(shè)應(yīng)急橋梁、搶建臨時用房等方面。根據(jù)板的受力特點(diǎn)可知,抗壓強(qiáng)度是蜂窩板的重要力學(xué)性能之一,因此本文將對一體化小柱蜂窩板的抗壓性能進(jìn)行研究,進(jìn)一步對蜂窩板的結(jié)構(gòu)參數(shù)進(jìn)行優(yōu)化。本文首先全面歸納了我國甲蟲前翅仿生研究中關(guān)于“小柱蜂窩板的三維結(jié)構(gòu)與力學(xué)解析、實物試制與力學(xué)特性”方面的進(jìn)展情況,明確一體化小柱蜂窩板在甲蟲前翅仿生研究中的定位,同時也為同行全面了解我國這方面的研究情況提供參考。然后,以完全一體化成型的蜂窩板為研究對象,從短切玄武巖纖維增強(qiáng)樹脂基復(fù)合材料的性能研究、蜂窩板的壓縮力學(xué)試驗及性能分析、基于Abaqus的小柱蜂窩板的抗壓性能研究、小柱蜂窩板結(jié)構(gòu)參數(shù)優(yōu)化研究四個方面進(jìn)行了研究。主要研究內(nèi)容如下：(1)短切玄武巖纖維增強(qiáng)樹脂基復(fù)合材料的性能研究。首先對樣本容量為20的單絲纖維進(jìn)行拉伸試驗,測得彈性模量E=82.7GPa；利用改進(jìn)的混合律方法(Reuss-Voigt模型)和三維隨機(jī)復(fù)合材料的方法,分別計算試驗用纖維增強(qiáng)復(fù)合材料(纖維體積分?jǐn)?shù)為20%)的理論彈性模量E=2.1GPa和2.48GPa；然后,由實測曲線和理論解析值討論確定E=2.38GPa。(2)一體化蜂窩板的壓縮力學(xué)試驗及性能分析。首先,制備了帶封邊結(jié)構(gòu)完全一體化的仿生纖維復(fù)合材料蜂窩板,并且提出了制作流程和制備工藝上的改進(jìn)方向；由試驗結(jié)果可得,其破壞形態(tài),可大致分為錯位型、壓實型和斷裂三類；其質(zhì)量比抗壓強(qiáng)度優(yōu)于單側(cè)膠蜂窩板,由此表明生物結(jié)構(gòu)具有優(yōu)秀的整體性力學(xué)性能。(3)基于Abaqus的一體化蜂窩板的抗壓性能研究。首先,建立小柱蜂窩板結(jié)構(gòu)的有限元模型,對其受壓過程進(jìn)行模擬分析,以獲得壓縮狀態(tài)下的等效應(yīng)力分布、特征點(diǎn)的最大應(yīng)力值、位移變形等詳細(xì)信息。蜂窩板抗壓強(qiáng)度的有限元分析結(jié)果為41.2MPa,而準(zhǔn)靜態(tài)壓縮試驗結(jié)果為37MPa,變形情況和強(qiáng)度對比表明有限元分析與試驗具有較好的一致性,為進(jìn)一步進(jìn)行蜂窩板結(jié)構(gòu)的優(yōu)化奠定基礎(chǔ)。(4)一體化蜂窩板結(jié)構(gòu)參數(shù)優(yōu)化研究。以蜂窩板為研究對象,利用有限元分析對其進(jìn)行參數(shù)優(yōu)化,研究內(nèi)容包括討論蜂窩六邊形數(shù)目、小柱分布密度、小柱直徑、面板厚度的參數(shù)對小柱蜂窩板的應(yīng)力分布和抗壓性能的影響；以體積比強(qiáng)度為設(shè)計目標(biāo),分別進(jìn)行單因子參數(shù)分析和參數(shù)正交設(shè)計。得到討論范圍內(nèi)的最優(yōu)解：小柱分布密度N=2、小柱直徑D=7mm、面板厚度h=1.5mm時,體積比強(qiáng)度最大。根據(jù)分析結(jié)果給出小柱蜂窩板的設(shè)計建議,為小柱蜂窩板件在實際工程中的設(shè)計提供理論依據(jù)。
[Abstract]:Honeycomb plate (honeycomb sandwich structure) is a typical lightweight and high-strength structure with the advantages of seismic, sound insulation and heat insulation. It has been widely used in transportation, aviation, construction and other industries in recent years. It is widely used in emergency engineering of natural disasters such as earthquake and flood, including setting up emergency bridges, building temporary houses and so on. According to the stress characteristics of the plates, the compressive strength is one of the important mechanical properties of honeycomb panels. Therefore, in this paper, the compressive performance of honeycomb plates with integrated columns is studied. The structural parameters of honeycomb plate are optimized further. Firstly, the progress of the bionic research on the front wing of beetles in China on the "three-dimensional structure and mechanical analysis, trial-manufacture and mechanical properties of honeycomb plate with small columns" is summarized in this paper. The position of integrated columnar honeycomb plate in the bionic study of beetle's front wing is clarified, and it also provides a reference for colleagues to understand the research situation in this field in our country. Then, taking the fully integrated honeycomb plate as the research object, In this paper, the properties of short cut basalt fiber reinforced resin matrix composites, compression mechanical tests and properties analysis of honeycomb plates, and compressive properties of small column honeycomb panels based on Abaqus are studied. Four aspects of structural parameters optimization of honeycomb panels are studied. The main contents are as follows: 1) the properties of short cut basalt fiber reinforced resin matrix composites. First, tensile tests of monofilament fibers with sample size of 20 are carried out. The theoretical modulus of elasticity of fiber reinforced composites (fiber volume fraction is 20) was calculated by using the modified mixing law method (Reuss-Voigt model) and the method of three-dimensional random composites, respectively, and the theoretical elastic moduli of fiber reinforced composites (fiber volume fraction 20) were calculated by using the modified mixing law method (Reuss-Voigt model) and 2.48GPa. The compressive mechanical test and performance analysis of the integrated honeycomb plate were determined from the measured curves and theoretical analytical values. Firstly, the bionic fiber composite honeycomb plate with complete edge sealing structure was prepared. According to the experimental results, the failure patterns can be roughly divided into three types: dislocation type, compaction type and fracture type, and its specific compressive strength is better than that of one-sided rubber honeycomb plate. It shows that biological structure has excellent overall mechanical properties. (3) Research on compressive performance of integrated honeycomb plate based on Abaqus. Firstly, the finite element model of honeycomb plate with small column is established, and the process of compression is simulated and analyzed. In order to obtain the equivalent stress distribution under compression state and the maximum stress value of the characteristic point, The result of finite element analysis of compressive strength of honeycomb plate is 41.2 MPA, while the result of quasi-static compression test is 37 MPA. The comparison of deformation and strength shows that the finite element analysis is in good agreement with the test. In order to lay a foundation for further optimization of honeycomb plate structure, the parameter optimization of honeycomb plate is studied. The parameters of honeycomb plate are optimized by finite element analysis, including the number of honeycomb hexagons. The influence of the parameters of column distribution density, column diameter and slab thickness on the stress distribution and compressive performance of honeycomb plate with small columns. Single factor parameter analysis and parameter orthogonal design were carried out respectively. The optimal solutions were obtained as follows: the distribution density of small column N ~ 2, the diameter of small column D _ (7) mm, and the thickness of panel h ~ (1.5 mm), the volume specific strength was the largest. According to the analysis results, the design suggestion of honeycomb plate with small column was given. It provides a theoretical basis for the design of honeycomb panels in practical engineering.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU398.9

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