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首页> 外文期刊>Ocean Engineering >Aeration effects on water-structure impacts: Part 1. drop plate impacts
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Aeration effects on water-structure impacts: Part 1. drop plate impacts

机译：曝气对水结构的影响：第1部分。

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Current offshore engineering design codes for wave loading are based on pure water, but wave impacts often involve aerated flow, either as a result of air entrapment as the wave overturns or due to impact with a wave that is already broken. Therefore, it is necessary to develop a new understanding of how design codes should incorporate water-air mixture for wave impact. This experimental study investigates aeration effects on wave impacts by means of slamming impacts of a square flat plate onto a pure and aerated water surface, with zero degree dead-rise angle. The (low) aeration level between 0% and 1.6% was applied and the drop velocity varied from about 1 m/s to 7 m/s. There was a significant reduction in the peak impact loads (both pressure and force) for impact in aerated water compared to that in pure water. There was also a significant reduction in the first phase of the pressure and force impulse for aerated water. The variation in impulsive loadings is less sensitive than peak loadings for impacts. The implication for design is that maximum instantaneous loads may be conservative in the presence of aerated water.
机译：当前的波浪载荷海上工程设计规范是基于纯净水的，但是波浪冲击通常涉及充气流，这可能是由于波浪翻转引起的空气滞留的结果，或者是由于已经破碎的波浪的冲击。因此，有必要对设计规范应如何结合水-空气混合物以产生波浪冲击产生新的认识。这项实验研究通过将正方形平板撞击到纯净且充气的水表面上（零死角为零）来调查曝气对波浪冲击的影响。施加介于0％和1.6％之间的（低）曝气水平，并且下落速度从大约1 m / s到7 m / s不等。与纯水相比，加气水中冲击的峰值冲击负荷（压力和力）显着降低。充气水的第一阶段的压力和力脉冲也大大降低了。对于冲击，脉冲载荷的变化不如峰值载荷敏感。设计的含义是在有充气水的情况下，最大瞬时载荷可能是保守的。

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