風(fēng)力發(fā)電機輪轂結(jié)構(gòu)性能分析（本科畢業(yè)論文設(shè)計）

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摘 要

在自然界中，風(fēng)是一種可再生、無污染而且儲量巨大的能源。隨著全球氣候變暖和能源危機，各國都在加緊對風(fēng)力的開發(fā)和利用，盡量減少二氧化碳等溫室氣體的排放，保護我們賴以生存的地球。我國風(fēng)力資源豐富，可開發(fā)利用的風(fēng)能儲量為10億千瓦。對風(fēng)能的利用，特別是對我國沿海島嶼，交通不便的邊遠山區(qū)，地廣人稀的草原牧場，以及遠離電網(wǎng)的農(nóng)村、邊疆，作為解決生產(chǎn)和生活能源的一種可靠途徑，具有十分重要的意義。風(fēng)力發(fā)電機是將風(fēng)能轉(zhuǎn)換為機械功的動力機械，又稱風(fēng)車。為了要確保風(fēng)力機在其設(shè)計壽命內(nèi)能夠正常地運行，首先必須對風(fēng)力發(fā)電機組的關(guān)鍵零部件展開設(shè)計研究。
輪轂是風(fēng)力發(fā)電機的重要組成部件之一，外界風(fēng)力傳給葉片，通過傳動機構(gòu)轉(zhuǎn)化成電能輸出，而輪轂就是接收外力并進行轉(zhuǎn)化的連接部件。作為連接件，它要承受復(fù)雜的外力及各種惡劣環(huán)境帶來的破壞，因此要有足夠的剛度和強度；同時作為生產(chǎn)需要的產(chǎn)品，在結(jié)構(gòu)上還要滿足經(jīng)濟利益的需求。因此要對其在極限狀態(tài)下進行靜強度分析和疲勞分析，得出應(yīng)力分布情況，找出危險部位。目前，國內(nèi)對輪轂的自主設(shè)計尚是一片空白，本文就是在這樣的研究背景下，對1MW風(fēng)力發(fā)電機組的輪轂進行分析。
本文基于有限元法的基本理論，對1MW輪轂進行了以下研究：
①應(yīng)用三維建模軟件Pro/e創(chuàng)建輪轂幾何模型，并與某企業(yè)提供的圖紙對比，確保模型正確。
②基于有限元分析理論，運用有網(wǎng)格劃分軟件HyperMesh對模型進行細致的網(wǎng)格劃分。本論文采用六面體網(wǎng)格劃分形式，主要考慮到六面體比較容易接近模型的實體結(jié)構(gòu)，使分析結(jié)果更具合理性。
③運用有限元分析軟件Patran對網(wǎng)格模型進行靜強度和疲勞分析，算出最大應(yīng)力及應(yīng)變，并將結(jié)果與某企業(yè)1.5MW的輪轂分析數(shù)據(jù)進行比較，從而驗證了本文分析方法的正確性。
本論文運用了有限元分析的方法，并且使用了工作質(zhì)量較高的有限元分析軟件，通過與某企業(yè)對輪轂的分析結(jié)果比較，證明了該方法的可靠性。本文的分析結(jié)果對生產(chǎn)制造有很高的利用價值，可以降低制造成本，提高生產(chǎn)經(jīng)濟性；提高了我國風(fēng)力設(shè)備技術(shù)水平，提高了市場競爭力，促進了國民經(jīng)濟的發(fā)展。

關(guān)鍵詞：風(fēng)力發(fā)電機，輪轂，有限單元法



ABSTRACT

In nature, wind is a sort of reproducible,no pollution,and reserves huge energy source. Both in company with global climate warm energy crisis,all nations are at pressure on the wind powered eploitation and avaol,as best as one can to make carbon dioxide isothermal chamber gas purging ,protest us survival earth. Our contry is rich in wind power resource ,the approvale exploitation avail wind energy reserves is 1 billion KW. The measures to solve the product and life energy problem by way of utilization of windpower,has important means,expecilly in the countryside in off-island,ungetatable side farther a mountainous area,terra expand human dilute grassland meadow,as well as far from electric network. Wind generater as known as wind mill,is a power machinery which change the wind power to mechanical power. In order to ensure that the wind machine in their design life within the normal functioning, we must first start the designing of the wind turbine on the key components.
Hub is an important component parts of wind generater, the wind power transmit to leaves through the transmition structures,and output as electrical energy. And hub is the connecting part which receive power outside and transmit. As connecting part,which have to bear the complexity and variety of adverse external environment which brought the destruction and therefore have to have enough strength and stiffness, at the same time as the products needs of production, it has to meet the demand on economic interests in the structure. Therefore it is necessary to do the static strength analysis and fatigue analysis in the limit state, get the stress distribution, to identify dangerous sites. This topic is in the context of such a study, analysis the hub of 1 MW wind turbine.
This thesis will research the 1MW hub depend on the basic theory of finite element as follows:
①Based on the theory of finite element analysis, using HyperMesh which is a software on mesh model detailed mesh. This thesis used hexahedral mesh form, considering that the hexahedral can easily l close to the entity structure of modal, and ensure the analysis results more reasonable.
②Use finite element analysis software Patran to perform the static strength and fatigue analysis on the grid model, calculate the maximum stress and strain, and compare it with the analysis results of 1.5 MW hub , so as to verify the correctness of this analysis.
In this thesis, the use of finite element analysis methods and the use of a higher quality of the finite element analysis software, ensure the reliability results.It has high utilization value for production, lower manufacturing costs and improve production economy; raise the technological level of China's wind power equipment, improve the market competitiveness, promoting national economic development.

Keyword ： Wind turbine, Hub, Finite element method, Optimization design


目 錄

摘 要 II
ABSTRACT III
1 緒論 2
1.1 課題研究背景 2
1.2 國內(nèi)外技術(shù)現(xiàn)狀綜述 3
1.2.1 國外技術(shù)現(xiàn)狀 3
1.2.2 國內(nèi)技術(shù)現(xiàn)狀 4
1.3 論文研究的意義與目的 5
1.3.1 論文研究的意義 5
1.3.2 論文研究的目的 6
1.4 ..