DETERMINATION OF COEFFICIENTS IN MORISON FORMULA BY A KALMAN FILTER

P. Wilde, E. Sobierajski, W. Romanczyk

Abstract


In the wave flume of the Institute of Hydroengineering in Gdansk experiments were performed with a vertical rigid cylinder of diameters d = 76.6 [mm] and d = 46.7 [mm] supported by elastic springs at the bottom and top in the inline and transverse directions (four degrees of freedom). The investigated dynamical system is show in Figure 1. The water depth was 0.80 [m], and the wave heights H = 12,20,25 [cm] were investigated. The displacements at the positions of the springs were measured. Details are given by Wilde and Sobierajski (in print). A Kalman filter of the type as presented by Wilde and Kozakiewicz (1984) and by Wilde and Romanczyk (1989) were used to decompose the measurements in components with frequencies equal to the multiple of the wave dominant frequency.

Keywords


Morison formula; Morison coefficients; Kalman filter; coefficient determination

Full Text: PDF

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.