本文選題：蜂窩夾層板 + 梯度　； 參考：《沈陽航空航天大學(xué)》2017年碩士論文

【摘要】：蜂窩夾層板在航空航天、汽車、船舶等領(lǐng)域已經(jīng)得到了廣泛的應(yīng)用,在建材、包裝運(yùn)輸及體育用品領(lǐng)域也逐漸嶄露頭角,未來的應(yīng)用前景十分廣闊,是一種性能十分優(yōu)秀的功能性材料。本文將分級梯度蜂窩概念引入常規(guī)蜂窩,連續(xù)改變相鄰蜂窩胞元尺寸,在總體尺寸和質(zhì)量與常規(guī)蜂窩相等的條件下構(gòu)造了沿面內(nèi)特定坐標(biāo)方向具有連續(xù)變化的胞元分布蜂窩,進(jìn)而形成了在面內(nèi)具有連續(xù)相對密度梯度的蜂窩夾層板結(jié)構(gòu)。應(yīng)用哈密頓原理和最小勢能原理推導(dǎo)了軸向密度梯度蜂窩夾層板的振動和屈曲控制方程。在考慮了蜂窩芯層的幾何特征后,應(yīng)用CATIA軟件建立三維實(shí)體模型,前處理軟件ANSA進(jìn)行幾何清理、網(wǎng)格劃分,有限元軟件ABAQUS進(jìn)行了建模與仿真,通過對比試驗數(shù)據(jù)驗證了方法的合理性。應(yīng)用有限元聯(lián)合仿真對六邊形和矩形軸向密度梯度蜂窩夾層板進(jìn)行了特征值屈曲分析和模態(tài)分析。研究了不同面板厚度、蜂窩胞元壁厚和蜂窩夾芯層高度對夾層板的穩(wěn)定性以及固有頻率的影響。同時還分析了在改變這些參數(shù)時梯度的變化對蜂窩密度梯度夾層板的穩(wěn)定性和固有頻率的影響。
[Abstract]:Honeycomb sandwich plates have been widely used in the fields of aerospace, automobile, ship and so on. They are also gradually emerging in the fields of building materials, packaging, transportation and sporting goods.It is a functional material with excellent performance.In this paper, the concept of graded gradient honeycomb is introduced into conventional honeycomb, and the size of adjacent honeycomb is continuously changed. Under the condition that the total size and mass are equal to that of conventional honeycomb, a cellular distributed honeycomb with continuous variation along the specific coordinate direction in the plane is constructed.Furthermore, a honeycomb sandwich plate structure with continuous relative density gradient in the plane is formed.The governing equations of vibration and buckling of honeycomb sandwich plates with axial density gradient are derived by using Hamiltonian principle and minimum potential energy principle.After considering the geometric characteristics of honeycomb core layer, the 3D solid model is established by using CATIA software, geometric cleaning, mesh generation, and finite element software ABAQUS are modeled and simulated by pre-processing software ANSA.The rationality of the method is verified by comparing the experimental data.The eigenvalue buckling analysis and modal analysis of hexagonal and rectangular density gradient honeycomb sandwich plates are carried out by finite element simulation.The effects of different thickness of panel, wall thickness of honeycomb cell and height of honeycomb sandwich layer on the stability and natural frequency of sandwich plate were studied.The influence of gradient on the stability and natural frequency of honeycomb density gradient sandwich plate is also analyzed.
【學(xué)位授予單位】：沈陽航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB383.4

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本文編號：1757663