关键词：泡沫；延时膨胀；运动；曳力；发泡率 [gap=9866]Keywords: foam; delayed expansion; movement; drag force; expansion rate
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fluid drag force 流体阻力
viscous-fluid drag force 粘滞液阻力
torsional drag force 扭转阻力
resistive drag force 阻力 ; 抗阻力
hydraulic drag force 水力拖曳力
drag-force flowmeter 阻力式流量计
Through the calculation, it can be validated that the period of lift force is about twice of the drag force.
通过计算，可以验证作用在立管上的升力周期是阻力的2倍。
参考来源 - 深水立管涡激振动的耦合模拟及抑制方法研究The equations of the three dimensional motion of a marine cable are formulated considering seabed touchdown, fluid drag force, interia force and structure damping. The characteristics of dynamic tesion and the interactions of seabed and the cable are invested.
考虑海底支持力、流体拖曳力、惯性力、结构阻尼等因素建立了系缆的运动方程,研究系缆的动张力变化特性以及海底支持力对系缆的影响。
参考来源 - Spar平台系缆张力及垂荡运动响应分析Comparison between normalized spectra of drag force and lift force is made, it shows drag force spectra is relatively broad-band, and lift force spectra is relatively narrow-band.4.
通过比较标准化后的阻力和升力谱,发现阻力谱为相对宽带谱,而升力受涡脱落影响更为严重,呈现相对窄带谱的形式。
参考来源 - 大型双曲冷却塔的风荷载和风致响应理论分析与试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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