【摘要】：針對(duì)有限流體域內(nèi)柔性管的渦致振動(dòng)問題,將柔性管離散為若干空間梁單元,流體域采用實(shí)體單元離散,建立了有限流體域內(nèi)柔性管系統(tǒng)的流固耦合模型及數(shù)值計(jì)算方法,設(shè)計(jì)并加工圓柱流體域內(nèi)柔性管振動(dòng)專用實(shí)驗(yàn)裝置,采用GWT-2B雙軸加速度傳感器對(duì)柔性管的振動(dòng)進(jìn)行監(jiān)測,并與數(shù)值模擬結(jié)果進(jìn)行對(duì)比,吻合程度較好.基于該文的模型和方法,對(duì)圓柱流體域內(nèi)不同位置處柔性管的渦致振動(dòng)機(jī)理進(jìn)行研究.結(jié)果表明,柔性管偏離入口流速位置的角度越大,越容易發(fā)生流體彈性不穩(wěn)定性,柔性管的振動(dòng)愈劇烈;而正對(duì)入口流速的位置,不易發(fā)生流體彈性不穩(wěn)定性,柔性管振動(dòng)減弱.
[Abstract]:Aiming at the vortex-induced vibration of flexible tube in finite fluid domain, the flexible tube is discretized into several space beam elements, and the fluid domain is discretized by solid element. The fluid-solid coupling model and numerical calculation method of flexible tube system in finite fluid domain are established. A special experiment device for flexible tube vibration in cylindrical fluid domain is designed and manufactured. The vibration of flexible tube is monitored by GWT-2B biaxial accelerometer. The results are compared with the numerical simulation results and the results are in good agreement with each other. Based on the model and method in this paper, the vortex-induced vibration mechanism of flexible tube at different positions in cylindrical fluid domain is studied. The results show that the greater the angle of the flexible tube deviates from the inlet velocity position, the more likely the fluid elastic instability will occur, and the more violent the flexible tube vibration is, the more difficult the fluid elastic instability will occur at the inlet velocity position. The vibration of the flexible tube is weakened.
【作者單位】： 東北石油大學(xué)機(jī)械科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金(11272085)~~
【分類號(hào)】：O322

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