Abstract Wave loading of offshore structures such as oil rigs and wind turbines are governing for the design of these structures. Since the environmental conditions may change during the lifetime, it is of great interest to evaluate the loads which the structure is exposed to at its current state. Since direct measurements of the loads are often not feasible, operators must rely on indirect methods like vibrations based load identification. In the field of indirect measurements, predicting the distribution of the loading is crucial in determining the magnitude. This paper will focus on this task. By analyzing the response from a miniature platform in a wave flume, a method for mapping the load distribution caused by regular wave loads is outlined. Using the output-only system identification from acceleration measurements of the structure, it is evaluated how accurate the load distribution can be predicted. In the experiment, the load distribution is estimated using both indirect methods (vibration-based) and “direct” methods using a roving set of pressure sensors.

中文翻译：

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使用间接方法预测波浪载荷分布

摘要 海上结构（如石油钻井平台和风力涡轮机）的波浪载荷控制着这些结构的设计。由于环境条件在生命周期内可能会发生变化，因此评估结构在其当前状态下所承受的载荷非常重要。由于直接测量载荷通常不可行，因此操作员必须依赖间接方法，例如基于振动的载荷识别。在间接测量领域，预测载荷分布对于确定大小至关重要。本文将重点介绍这项任务。通过分析波浪水槽中微型平台的响应，概述了一种绘制规则波浪载荷引起的载荷分布的方法。使用来自结构加速度测量的仅输出系统识别，评估可以预测负载分布的准确程度。在实验中，使用间接方法（基于振动）和使用一组流动压力传感器的“直接”方法估计载荷分布。