Abstract The small heeling floating condition caused by asymmetry buoyancy is high possibility to happen during the trimaran voyage. In order to observe the characteristic of trimaran seakeeping performance and load response in small heeling condition, the segmented model and corresponding monitoring scheme is designed in detail. A series of model tests were conducted to measure motion and wave-induced load response under regular waves and irregular waves respectively. Based on the experiment data, the motion and load response distribution on the longitudinal and transverse structure is calculated statistically. And the influence of small heeling condition towards different speeds and wave heights is analyzed further. In addition, the numerical simulation based on three-dimensional potential flow theory is also applied to verify the characteristics of trimaran motion and load in small heeling condition. Finally, the scheme of trimaran model in small heeling condition is successful and feasible. And the dangerous structural position of trimaran is found out. The corresponding effective measures are also given to deal with the potential danger in small heeling condition.

中文翻译：

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三体船小横倾条件下耐波性能及载荷响应试验研究

摘要 三体船航行中极有可能发生由不对称浮力引起的小横摇漂浮情况。为了观察小横倾条件下三体船的耐波性能和载荷响应特性，详细设计了分段模型和相应的监测方案。进行了一系列模型试验，分别测量了规则波浪和不规则波浪下的运动和波浪引起的载荷响应。根据实验数据，统计计算纵向和横向结构上的运动和载荷响应分布。并进一步分析了小横倾条件对不同航速和波高的影响。此外，还应用基于三维势流理论的数值模拟来验证小横倾条件下三体船的运动和载荷特性。最后，小横倾条件下的三体船模型方案是成功可行的。并找出了三体船危险的结构位置。针对小横倾状态下的潜在危险，也给出了相应的有效措施。