Development of a portable 3D hull roughness analyzer
Development of a portable 3D hull roughness analyzer
复制标题
便携式3D船体粗糙度分析仪的开发
DOI：
10.1007/s00773-019-00656-x
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发表时间：
2020
影响因子：
2.6
通讯作者：
T. Katsui
中科院分区：
文献类型：
--
作者：
Hirohisa Mieno;T. Katsui
在船舶的船体表面上，由于油漆而产生的粗糙度对船舶的阻力具有显著影响。在船舶设计阶段，通常采用ITTC 1978公式，以Ks作为粗糙度参数来估算粗糙度阻力系数。Ks也被称为平均船体粗糙度，其由使用BSRA船体粗糙度分析仪从船舶船体上的多个位置收集的Pt50（在50 mm的评估长度中最大峰高和最大谷深之间的差）值的平均值组成。该分析仪具有简单易用、适用于实际造船现场等优点，得到了广泛的应用。但是，该分析仪只能测量Pt50值。以往的研究表明，不仅粗糙度参数，而且波长参数也会影响摩擦阻力。因此，在这里，我们已经开发了一种新的便携式粗糙度测量设备，可以测量各种参数，包括波长，并获得三维（3D）轮廓图像。这种新开发的便携式粗糙度分析仪可以编辑大量的表面粗糙度的3D图像，并从测量的粗糙度轮廓计算各种参数。
On the surface of a ship’s hull, roughness due to paint has significant effects on the ship’s resistance. In the ship design stage, the roughness resistance coefficient, ∆Cf, is commonly estimated by the ITTC1978 formula using Ks as a roughness parameter. Ks is also known as the average hull roughness, which is composed of the average of the Pt50 (the difference between the maximum peak height and the maximum valley depth in an evaluation length of 50 mm) values collected from multiple locations on the ship’s hull, using the BSRA hull roughness analyzer. The analyzer has been widely used because it is simple and easy to use and suitable at actual shipbuilding sites. However, this analyzer is only able to measure Pt50 values. In past studies, it has been indicated that not only the roughness height parameter but also wavelength parameter can affect friction resistance. Hence, here we have developed a new portable roughness measurement device that can measure various parameters, including the wavelength, and obtain three-dimensional (3D) profile images. This newly developed portable roughness analyzer can compile a large quantity of 3D images of surface roughness and calculate various parameters from the measured roughness profiles.