E-Motions wave energy converter is a promising device capable of harnessing energy from wave/wind induced roll oscillations onto a generic floating platform, whose development was initiated with an experimental proof-of-concept study that, despite demonstrating the potentialities of the device, also highlighted the need for further developments, aimed at improving its performance and efficiency. This justified a new phase of numerical modelling, where E-Motions was reproduced within the ANSYS® AQWA™ environment, a potential theory-based numerical model widely used in the field of wave energy converter development. The model was setup (first stage) and calibrated (second stage) with experimental data from a proof-of-concept study, carried out on a 1:40 geometric scale, with a good agreement being obtained for the hydrostatic properties (difference below 5%) and hydrodynamic roll response (minimum average error of 2.83°). From a follow-up third stage, focused on comparing eight different hull solutions with similar natural roll periods, it was determined that the half-sphere and trapezoidal prism geometries produced the highest power outputs for the studied conditions (maximum average outputs of nearly 5 kW/m and 8 kW/m, respectively). These two designs were then adapted to a 1:20 geometric scale alongside an updated version of the half-cylinder, which served as a “control” case, and subjected to a final stage of numerical modelling centered on assessing the Power Take-Off’s influence (namely through variable damping and mass) in their performance. Outcomes from this stage denote the necessity of a careful selection of Power Take-Off mass/damping combinations, as a disproportionate relationship could lead to scenarios where the conversion system would stall on one of the superstructure’s sides, moving within a very limited range of the available sliding amplitude. Maximum average power output values reach nearly 24 kW, 30 kW and 18 kW for the half-cylinder, half-sphere and trapezoidal prism, respectively, with a follow-up experimental study being planned for the near future, in order to evaluate the validity of these results.

E-Motions 波浪能转换器是一种很有前途的设备，能够将波浪/风引起的滚动振荡的能量利用到通用浮动平台上，其开发始于一项实验性概念验证研究，尽管证明了该设备的潜力，还强调了进一步发展的必要性，旨在提高其绩效和效率。这证明了数值建模的新阶段是合理的，其中 E-Motions 在 ANSYS® AQWA™ 环境中重现，ANSYS® AQWA™ 环境是一种广泛用于波浪能转换器开发领域的潜在理论数值模型。该模型使用来自概念验证研究的实验数据进行设置（第一阶段）和校准（第二阶段），在 1:40 几何比例下进行，流体静力学特性（差异低于 5%）和流体动力学滚动响应（最小平均误差为 2.83°）获得了很好的一致性。从后续的第三阶段开始，重点是比较具有相似自然横摇周期的八种不同船体解决方案，确定半球和梯形棱柱几何形状在研究条件下产生最高功率输出（最大平均输出近 5 kW /m 和 8 kW/m）。然后将这两种设计调整为 1:20 几何比例以及更新版本的半圆柱体，作为“控制”案例，并进行以评估取力器影响为中心的数值建模的最后阶段（即通过可变阻尼和质量）在他们的表现。这一阶段的结果表明有必要仔细选择取力器质量/阻尼组合，因为不成比例的关系可能导致转换系统在上部结构的一侧停转，在非常有限的范围内移动的情况。可用的滑动幅度。半圆柱体、半球体和梯形棱柱的最大平均功率输出值分别达到近 24 kW、30 kW 和 18 kW，并计划在不久的将来进行后续实验研究，以评估其有效性这些结果。