CAJ | 학술논문

文章提出了海底悬空输流管道纯顺流向涡激振动预报的尾流振子模型，运用两类不同的van der Pol方程描述旋涡尾迹特性。重点分析了悬跨长度，内流因素和轴向力对纯顺流向涡激振动的影响。结果表明：大悬跨长度、小轴向力和高速内流介质可以降低纯顺流向涡激振动发生的速度范围，使其更容易发生。
문장제출료해저현공수류관도순순류향와격진동예보적미류진자모형，운용량류불동적van der Pol방정묘술선와미적특성。중점분석료현과장도，내류인소화축향력대순순류향와격진동적영향。결과표명：대현과장도、소축향력화고속내류개질가이강저순순류향와격진동발생적속도범위，사기경용역발생。
An effective wake oscillator model for pure in-line (IL) vortex induced-vibrations (VIV) of a free spanning pipeline conveying fluid was presented. Two different kinds of van der Pol equa-tions were adopted to describe the wake dynamics related to the fluctuating nature of symmetric vor-tex shedding in the first IL VIV region and alternate vortex shedding in the second one. The effects of span length, internal fluid and axial tension on the pure IL VIV dynamics were mainly investigat-ed. The results indicate that long span length, small axial tension and high internal fluid velocity could reduce the incident current velocity range of pure IL VIV and make pure IL VIV easy to occur.