本文選題：運(yùn)動(dòng)參考系　切入點(diǎn)：渦激振動(dòng)　出處：《振動(dòng)與沖擊》2017年06期 　論文類型：期刊論文

【摘要】：為模擬平動(dòng)渦激振動(dòng),采用一種無變形網(wǎng)格的計(jì)算方法。通過運(yùn)動(dòng)參考系模擬整個(gè)求解域的運(yùn)動(dòng),結(jié)合非結(jié)構(gòu)網(wǎng)格下高精度算法,在NS方程中引入運(yùn)動(dòng)參考系引起的對(duì)流項(xiàng)及采用新的邊界處理方式,通過構(gòu)造合理的計(jì)算求解域,對(duì)低雷諾數(shù)下(Re=200)圓柱渦激振動(dòng)進(jìn)行了模擬,得到了圓柱渦激振動(dòng)振幅以及詳細(xì)流場(chǎng)結(jié)構(gòu),與實(shí)驗(yàn)結(jié)果和數(shù)值結(jié)果相比都得到了很好的一致性。并對(duì)不同阻尼比、頻率比等參數(shù)進(jìn)行研究,詳細(xì)對(duì)比了不同振幅下尾流結(jié)構(gòu)特征。結(jié)果證明了該計(jì)算方法是可行的、準(zhǔn)確的。
[Abstract]:In order to simulate the translational vortex-induced vibration, a deformation-free mesh method is used to simulate the motion of the whole solution domain through the motion reference system. The flow term caused by the motion reference system is introduced into the NS equation and a new boundary treatment method is used to simulate the vortex induced vibration of a circular cylinder at low Reynolds number by constructing a reasonable computational solution domain. The vibration amplitude and the structure of the detailed flow field are obtained, which are in good agreement with the experimental and numerical results, and the parameters such as damping ratio and frequency ratio are studied. The characteristics of wake structure with different amplitudes are compared in detail. The results show that the proposed method is feasible and accurate.
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本文編號(hào)：1573781