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An investigation on the vertical motion sickness characteristics of a high-speed catamaran ferry

机译：高速双体船渡轮垂直晕特性研究

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Low frequent motions of vessel may cause motion sickness in rough seas. These undesirable effects induce fatigue of crews during the navigation. The motion sickness is always an important criterion for the high-speed craft design. Modern ferry designs have been marketed with a great emphasis on the seakeeping performance. This research has been carried out by investigating the results on the vertical motion sickness incidence (MSI) study for a 40 m wave-piecing catamaran at seas. The primary purpose of this research is to investigate the vertical motion sickness characteristics of a high-speed catamaran ferry. Two mathematical models, three-dimensional translating-pulsating source distribution technique and three-dimensional pulsating source distribution technique, are used for predicting the vertical acceleration responses of the wave-piecing catamaran in oblique waves. The comparison between numerical predictions and experimental data shows a good agreement except that around the pitch resonance region in FP vertical acceleration motions. Based on the experimental observation, the discrepancies may be caused by the nonlinear effects of centre bow during large pitch motions in waves. The comfort assessments are based on the ISO-2631/1997 standard with the hydrodynamic analysis for determining the acceleration levels in different locations on the vessel. The effects of seating location, wave heading and duration of motion exposure on seasickness are discussed.
机译：船舶低频率运动可能会在波涛汹涌的大海中引起晕动病。这些不良影响会导致船员在航行期间疲劳。晕动病一直是高速工艺设计的重要标准。已经投放市场的现代渡轮设计非常重视海上航行性能。这项研究是通过调查40 m海上波浪双体船的垂直运动病发病率（MSI）研究的结果而进行的。这项研究的主要目的是研究高速双体船的垂直运动病特征。三维平移脉动源分布技术和三维脉动源分布技术这两个数学模型用于预测斜波中双体双体船的垂直加速度响应。数值预测与实验数据之间的比较显示出很好的一致性，除了在FP垂直加速度运动中的俯仰共振区域附近。根据实验观察，差异可能是由于波浪中大俯仰运动期间中心弓的非线性效应引起的。舒适度评估基于ISO-2631 / 1997标准以及流体动力学分析来确定船上不同位置的加速度水平。讨论了座位位置，波浪方向和运动持续时间对晕船的影响。

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