Rigid and hinged very large floating structure (VLFS) dataset - Kelvin Hydrodynamics Laboratory

This dataset corresponds to the measurements performed at the Kelvin Hydrodynamics Laboratory at the University of Strathclyde, in August 2022, to assess the motion performance and internal loading of a rigid and hinged very large floating structure (VLFS) under regular waves. The VLFS was constructed with three pontoons and two hinges. The hinges were replaced with aluminium steel bars to built the rigid VLFS. The dimensions of each pontoon of the VLFS were 580 mm x 580 mm x 52 mm. Each pontoon was built with 2 mm layer of carbon fibre and a 50 mm layer of PVC foam.
The VLFS was tested in regular waves at two incidences: 0 degrees and 30 degrees. For 0 degree incidence, the wave frequencies tested ranged from 0.4 to1.6 Hz in intervals of 0.1 Hz. Four wave heights were tested, h=5, 10, 20 and 40 mm. For 30 degree incidence, the same range of frequencies were tested, but only one wave height, h=5 mm. Preliminary results for some of the data at 0 degrees incidence can be found in the conference paper: https://doi.org/10.36688/ewtec-2023-389.  Further analysis of this dataset and additional results are in preparation for a journal manuscript.
The following files are included as part of the dataset:

Motion files (Matlab files).
Strain gauge and wave height files (Matlab files).
Data description file - Description of files.
Test matrix - Test cases summarised with nomenclature used in files.
Matlab script to sort out position of motion spheres as depicted in Figure 1.
Video of the hinged VLFS subject to a train of regular waves at f=0.8 Hz, i.e. when the wavelength is of similar length to the length of the platform, i.e. f=0.8 Hz.

The motion files contain the time series information recorded for each of the motion detection spheres. Because the motion raw data is not labelled sequentially, it is necessary to run the Matlab file included in the data repository to sort out the information of the spheres.
The strain gauge files contain the raw strain gauge data (8 channels) and the wave gauge data with the file number describing the corresponding test in the test matrix.
The VLFS was equipped with 36 motion detection spheres and 8 strain gauges. The diagram and notation of each sphere is depicted in Figure 1. Figure 1 is available in the Data description document.

本数据集对应2022年8月于思克莱德大学（University of Strathclyde）开尔文流体力学实验室（Kelvin Hydrodynamics Laboratory）开展的试验测量工作，旨在评估刚性铰接式超大型浮式结构物（very large floating structure, VLFS）在规则波作用下的运动性能与内部载荷。
该超大型浮式结构物由3个浮筒与2个铰接点组成，本次试验中采用铝钢棒替代铰接点以构建刚性VLFS。每个浮筒的尺寸为580 mm × 580 mm × 52 mm，其结构由2 mm厚碳纤维层与50 mm厚PVC泡沫层构成。
该VLFS在两种入射角度下开展规则波试验：0°与30°。当入射角度为0°时，试验波频范围为0.4~1.6 Hz，步长为0.1 Hz，共测试4种波高：h=5、10、20与40 mm。当入射角度为30°时，波频范围与0°工况一致，但仅采用h=5 mm的波高。部分0°工况的初步试验结果已发表于会议论文：https://doi.org/10.36688/ewtec-2023-389。本数据集的进一步分析与补充结果已筹备为期刊稿件。
本数据集包含以下文件：
1. 运动数据文件（Matlab格式文件）
2. 应变片与波高数据文件（Matlab格式文件）
3. 数据说明文件：对各文件的详细说明
4. 试验工况表：采用文件内命名规范汇总的试验案例清单
5. Matlab脚本：用于整理如图1所示的运动探测球体位置信息
6. 铰接式VLFS受规则波列作用的试验视频：对应波频f=0.8 Hz（此时波长与浮式平台长度近似相等）。
运动数据文件包含各运动探测球体的时序记录信息。由于原始运动数据未按顺序标注，需运行数据集附带的Matlab脚本以整理各球体的对应信息。
应变片数据文件包含8通道原始应变片数据与浪高仪数据，文件名对应试验工况表中的相应试验编号。
该VLFS共配备36个运动探测球体与8个应变片，各球体的示意图与命名规则详见图1，图1可在数据说明文档中获取。