正方形截面振子在不同來(lái)流方向的單自由度流致振動(dòng)特性研究
發(fā)布時(shí)間：2018-11-21 11:32
【摘要】：在自循環(huán)水槽進(jìn)行了正方形截面振子的流致振動(dòng)試驗(yàn)研究,分析了不同來(lái)流角度下的振子響應(yīng)特征,探討了有利于能量轉(zhuǎn)換的角度安排,闡釋了系統(tǒng)剛度與質(zhì)量因素對(duì)該響應(yīng)的基本影響,并擬合得到了不同來(lái)流角度下的斯特羅哈爾數(shù)St。結(jié)果表明:來(lái)流角度為零條件下的振子響應(yīng)為馳振主導(dǎo),而來(lái)流角度非零條件下的振子響應(yīng)為渦激振動(dòng)主導(dǎo);低流速時(shí),來(lái)流角度大有助于振子對(duì)渦激振動(dòng)能量的汲取,而高流速時(shí),來(lái)流角度為零有助于振子對(duì)馳振能量的汲取;振動(dòng)振幅受剛度與質(zhì)量的影響顯著,但頻率則幾乎不受剛度與質(zhì)量的影響;來(lái)流角度為30°和45°時(shí),St較接近,約0.14,來(lái)流角度為15°時(shí),St約0.16。
[Abstract]:The fluid-induced vibration of a square section oscillator in a self-circulating flume is studied. The response characteristics of the oscillator at different flow angles are analyzed, and the angle arrangements conducive to energy conversion are discussed. The effects of system stiffness and mass on the response are explained, and the Strowhall number St. at different flow angles is obtained by fitting. The results show that the response of the oscillator with zero flow angle is dominated by galloping vibration, while the response of the oscillator under the condition of non-zero flow angle is dominated by vortex-induced vibration. At low velocity, the large angle of flow is helpful for the vibrator to absorb the vibrator energy of vortex-induced vibration, but at high velocity, the zero angle of flow is helpful for the vibrator to absorb the energy of galloping vibration. The vibration amplitude is significantly affected by the stiffness and mass, but the frequency is almost unaffected by the stiffness and mass. When the inflow angle is 30 擄and 45 擄, the St is close, about 0.14, and the St is about 0.16 when the incoming flow angle is 15 擄.
【作者單位】： 天津大學(xué)水利工程仿真與安全國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：基金項(xiàng)目:水力發(fā)電系統(tǒng)耦聯(lián)動(dòng)力安全及智能運(yùn)行技術(shù)(2016YFC0401905)
【分類號(hào)】：O353.4
本文編號(hào)：2346839
[Abstract]:The fluid-induced vibration of a square section oscillator in a self-circulating flume is studied. The response characteristics of the oscillator at different flow angles are analyzed, and the angle arrangements conducive to energy conversion are discussed. The effects of system stiffness and mass on the response are explained, and the Strowhall number St. at different flow angles is obtained by fitting. The results show that the response of the oscillator with zero flow angle is dominated by galloping vibration, while the response of the oscillator under the condition of non-zero flow angle is dominated by vortex-induced vibration. At low velocity, the large angle of flow is helpful for the vibrator to absorb the vibrator energy of vortex-induced vibration, but at high velocity, the zero angle of flow is helpful for the vibrator to absorb the energy of galloping vibration. The vibration amplitude is significantly affected by the stiffness and mass, but the frequency is almost unaffected by the stiffness and mass. When the inflow angle is 30 擄and 45 擄, the St is close, about 0.14, and the St is about 0.16 when the incoming flow angle is 15 擄.
【作者單位】： 天津大學(xué)水利工程仿真與安全國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：基金項(xiàng)目:水力發(fā)電系統(tǒng)耦聯(lián)動(dòng)力安全及智能運(yùn)行技術(shù)(2016YFC0401905)
【分類號(hào)】：O353.4
【相似文獻(xiàn)】
相關(guān)期刊論文 前3條
1 毛慶,張景繪;反應(yīng)堆吊籃流致振動(dòng)響應(yīng)分析中的理論研究[J];核動(dòng)力工程;2004年03期
2 鄒長(zhǎng)川;疊層板形元件流致振動(dòng)測(cè)試與分析[J];貴州工業(yè)大學(xué)學(xué)報(bào);1997年S1期
3 陳貴清,楊翊仁;受非線性支承的板狀梁結(jié)構(gòu)流致振動(dòng)研究[J];固體力學(xué)學(xué)報(bào);2003年03期
相關(guān)博士學(xué)位論文 前4條
1 王華坤;基于ALE動(dòng)網(wǎng)格的流固耦合分區(qū)算法及其在流致振動(dòng)分析中的應(yīng)用[D];上海交通大學(xué);2015年
2 丁林;被動(dòng)湍流控制下多柱體流致振動(dòng)研究[D];重慶大學(xué);2013年
3 唐敏;曲管結(jié)構(gòu)的三維流致振動(dòng)研究[D];華中科技大學(xué);2014年
4 代胡亮;細(xì)長(zhǎng)結(jié)構(gòu)的流致振動(dòng)及其俘能研究[D];華中科技大學(xué);2014年
相關(guān)碩士學(xué)位論文 前1條
1 李恒;不同截面形狀柱體流致振動(dòng)及能量轉(zhuǎn)換特性[D];重慶大學(xué);2015年
，本文編號(hào)：2346839
本文鏈接：http://sikaile.net/kejilunwen/lxlw/2346839.html
最近更新
教材專著
