本文選題：復(fù)合材料 + 工程方法��； 參考：《重慶理工大學(xué)》2015年碩士論文

【摘要】：復(fù)合材料與金屬材料相比不僅僅具有強(qiáng)度高、剛度大等優(yōu)點(diǎn),而且可以通過控制鋪層厚度、鋪層方向等方法來改變材料的性能,使產(chǎn)品性能得到充分發(fā)揮,讓材料設(shè)計(jì)和結(jié)構(gòu)設(shè)計(jì)達(dá)到高度統(tǒng)一。針對(duì)飛機(jī)復(fù)合材料結(jié)構(gòu)的優(yōu)化設(shè)計(jì),在保證飛機(jī)的承載能力不變情況下,通過優(yōu)化復(fù)合材料的鋪層比例和鋪層次序,可以大幅度降低飛機(jī)的質(zhì)量,從而降低飛機(jī)的生產(chǎn)成本。因此復(fù)合材料在飛機(jī)上的使用,是飛機(jī)在結(jié)構(gòu)設(shè)計(jì)上的重大突破。如何針對(duì)復(fù)合材料進(jìn)行優(yōu)化設(shè)計(jì)則是這個(gè)重大突破必須解決的關(guān)鍵性難題。本文以復(fù)合材料機(jī)翼為研究對(duì)象,對(duì)該結(jié)構(gòu)進(jìn)行參數(shù)優(yōu)化,得到質(zhì)量最輕且滿足承載能力的復(fù)合材料機(jī)翼。主要做了如下工作:(1)利用理論推導(dǎo)結(jié)合工程實(shí)際,得到復(fù)合材料層合板結(jié)構(gòu)計(jì)算軸壓屈曲載荷的工程計(jì)算方法,分別運(yùn)用工程方法與有限元法,對(duì)不同厚度和尺寸的層合板結(jié)構(gòu)屈曲載荷計(jì)算結(jié)果進(jìn)行對(duì)比。(2)選擇適用于復(fù)合材料機(jī)翼翼盒優(yōu)化的技術(shù)路線,運(yùn)用商業(yè)軟件進(jìn)行鋪層次序優(yōu)化,建立復(fù)合材料尺寸優(yōu)化鋪層庫。(3)針對(duì)復(fù)合材料機(jī)翼翼盒粗模型,本文進(jìn)行了前處理檢查和模型預(yù)分析檢查,以確保模型的正確性。針對(duì)機(jī)翼實(shí)際工況多、計(jì)算時(shí)間長(zhǎng)的難題,本文利用單值包線法,對(duì)該機(jī)翼進(jìn)行嚴(yán)重工況挑選,以減少計(jì)算時(shí)間,最后運(yùn)用商業(yè)軟件進(jìn)行尺寸優(yōu)化。(4)利用TCL/TK腳本語言二次開發(fā),編寫了復(fù)合材料前處理工具集和復(fù)合材料結(jié)構(gòu)穩(wěn)定性計(jì)算工具,達(dá)到節(jié)約建模和計(jì)算時(shí)間的目的。本文運(yùn)用算例驗(yàn)證了優(yōu)化技術(shù)路線,完成了復(fù)合材料機(jī)翼翼盒優(yōu)化,并開發(fā)了能節(jié)約前處理時(shí)間的工具,對(duì)復(fù)合材料層合板結(jié)構(gòu)優(yōu)化設(shè)計(jì)具有一定的參考價(jià)值。
[Abstract]:Compared with metal materials, composite materials not only have the advantages of high strength and high stiffness, but also can change the properties of materials by controlling the thickness and orientation of the layers, so that the properties of the products can be brought into full play.Material design and structure design to achieve a high degree of unity.According to the optimal design of aircraft composite structure, the quality of aircraft can be greatly reduced and the production cost of aircraft can be reduced by optimizing the proportion and sequence of composite layers under the condition that the aircraft's bearing capacity is invariable.Therefore, the use of composite materials in aircraft is a major breakthrough in structural design.How to optimize the design of composite materials is a key problem that must be solved in this breakthrough.In this paper, the composite wing is studied, and the structure parameters are optimized to obtain the composite wing with the lightest mass and satisfying the bearing capacity.The main work is as follows: (1) the engineering calculation method for calculating the axial buckling load of composite laminated structure is obtained by combining the theoretical derivation with engineering practice, and the engineering method and finite element method are used respectively.The buckling load calculation results of laminated plate structures with different thickness and size are compared. (2) selecting the technical route suitable for the wing box optimization of composite wing, and using commercial software to optimize the layering order.In order to ensure the correctness of the model, the pre-processing check and model pre-analysis check are carried out for the wing box coarse model of the composite wing in order to ensure the correctness of the model.In view of the problem that the wing has many actual working conditions and long calculation time, this paper uses the single value envelope method to select the serious working conditions of the wing to reduce the calculation time. Finally, the commercial software is used to optimize the size of the wing. 4) the TCL/TK script language is used for secondary development.The pre-processing tool set of composite materials and the structural stability calculation tool of composite materials are compiled to save the time of modeling and calculation.In this paper, an example is used to verify the optimization technology, and the optimization of wing box of composite wing is completed, and a tool is developed to save the pre-processing time, which has a certain reference value for the optimization design of composite laminated plate structure.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB33

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相關(guān)期刊論文 前1條

1 李志報(bào);袁亮;;基于Tcl/Tk語言的自動(dòng)化測(cè)試平臺(tái)的實(shí)現(xiàn)[J];電子技術(shù)應(yīng)用;2013年01期

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本文編號(hào)：1737237