The nonsmooth morphology of primaries is propitious to reducing the air vortex resistance which is caused by flapping volitation.
鸽初级飞羽的非光滑形态，有利于减少振翅飞翔中产生的空气漩涡的阻力。
Inner vortex speeding cyclone dust collector can increase the dust collecting rate, decrease system resistance and prevent dust from adhering on the wall.
内旋流加速旋风集尘器提高了粉尘率，减少了系统阻力，防止了粉尘粘壁。
Vortex-induced vibration is limited amplitude response, but it occurs at low wind speed with relative large amplitude, which will affect the strength and fatigue resistance of the structure.
尽管涡振是一种限幅振动，但由于其发生风速较低，振幅相对较大，会影响结构的强度和疲劳，因此大跨度拱桥的涡振响应研究具有重要的意义。
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