本文關(guān)鍵詞：內(nèi)部擺式波能轉(zhuǎn)換裝置水動(dòng)力性能的數(shù)值研究　出處：《大連理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 波能轉(zhuǎn)換裝置 內(nèi)部擺式 水動(dòng)力性能 數(shù)值模擬

【摘要】：海洋中的波浪能利用技術(shù)在最近五十多年以來取得了長(zhǎng)足的進(jìn)步,各個(gè)國(guó)家和地區(qū)對(duì)其進(jìn)行了大量研究,先后提出多種形式的波能轉(zhuǎn)換裝置的構(gòu)想,有些做成試驗(yàn)裝備問世,其中一部分已經(jīng)投入商業(yè)化生產(chǎn)。 本文所研究的內(nèi)部擺式波能轉(zhuǎn)換裝置是一種利用波浪作用下內(nèi)部擺和外部浮體相對(duì)運(yùn)動(dòng),推動(dòng)液壓泵,驅(qū)動(dòng)發(fā)電機(jī)產(chǎn)生電能。這種新形式的波能轉(zhuǎn)換裝置的主要優(yōu)點(diǎn)是：適應(yīng)環(huán)境多樣、造價(jià)相對(duì)較低、耐久性高。在國(guó)外還處于理論研究階段,亟待進(jìn)一步的探討。 本文首先分析了內(nèi)部擺式波能轉(zhuǎn)換裝置的受力分析和運(yùn)動(dòng)分析,基于勢(shì)流理論分析了波浪對(duì)裝置的作用,分別建立了波能轉(zhuǎn)換裝置的頻域運(yùn)動(dòng)方程和時(shí)域運(yùn)動(dòng)方程用以求出運(yùn)動(dòng)響應(yīng),并以此為基礎(chǔ)求出傳動(dòng)力、傳動(dòng)力矩、輸出功率、波能俘獲效率。主要從以下幾個(gè)方面展開工作： (1)首先重點(diǎn)考慮內(nèi)部液壓系統(tǒng)阻尼、內(nèi)部液壓系統(tǒng)剛度、外部浮體水平剛度三個(gè)參數(shù)的配合,大致確定了這三個(gè)參數(shù)的取值。 (2)對(duì)結(jié)構(gòu)的浮體質(zhì)量與內(nèi)部擺質(zhì)量的比值、內(nèi)部擺的大球質(zhì)量和小球質(zhì)量之比、內(nèi)部擺和外部浮體的連接點(diǎn)與外部浮體的質(zhì)心的距離、大球質(zhì)心與內(nèi)部擺和外部浮體的連接點(diǎn)的距離等參數(shù)進(jìn)行改變,通過頻域模型給出合理的模型設(shè)計(jì)參數(shù)。 (3)考慮了的非線性質(zhì)量陣和非線性附加力的影響,通過時(shí)域計(jì)算,更加準(zhǔn)確的估算了結(jié)構(gòu)的水動(dòng)力特性和輸出功率。
[Abstract]:The technology of wave energy utilization in the ocean has made great progress in the last 50 years. Various countries and regions have carried out a lot of research on it, and put forward the concept of various forms of wave energy conversion device. Some have been made into experimental equipment, some of which have been put into commercial production. The internal pendulum wave energy conversion device studied in this paper is a kind of relative motion between the internal pendulum and the external floating body under the action of the wave to promote the hydraulic pump. The main advantages of this new type of wave energy conversion device are that it adapts to various environments, relatively low cost and high durability, and is still in the stage of theoretical research abroad. There is an urgent need for further discussion. In this paper, the force analysis and motion analysis of the internal pendulum wave energy conversion device are first analyzed, and the effect of the wave on the device is analyzed based on the potential flow theory. The frequency domain motion equation and the time domain motion equation of the wave energy conversion device are established to obtain the motion response, and on this basis, the transmission force, transmission torque and output power are obtained. Wave energy capture efficiency. The work is mainly carried out in the following aspects: Firstly, three parameters of internal hydraulic system damping, internal hydraulic system stiffness and external horizontal stiffness of floating body are considered, and the values of these three parameters are roughly determined. (2) the ratio of the mass of the floating body to the mass of the internal pendulum, the ratio of the mass of the inner pendulum to the mass of the small ball, the distance between the connecting point between the internal pendulum and the external floating body and the center of mass of the outer floating body. The parameters such as the distance between the center of mass of the ball and the connection point between the inner pendulum and the external floating body are changed and the reasonable design parameters of the model are given through the frequency-domain model. Considering the influence of nonlinear mass matrix and nonlinear additional force, the hydrodynamic characteristics and output power of the structure are estimated more accurately by time domain calculation.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P743.2

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本文編號(hào)：1390245