A computational tool for wind wave prediction based on CEM method

Download

index.pdf

Date

2022-5-11

Author

Emrecan, Polat

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

152
views

483
downloads

In this study, a computational tool is presented for the wind wave prediction based on the CEM Method. The method is given for the computation of storm-averaged wind wave characteristics. The computational tool utilizes the hourly average wind speed and direction and the effective fetch data for a geographical location to compute the hourly significant wave height and period and the mean direction. In the study, the main focus is given on identifying the individual storms and the individual storm durations considered in the computation of hourly wind wave characteristics. The computational tool is applied to two locations in the Mediterranean Sea, where the wind and wave buoy measurements are available. The individual storms are identified based on three main parameters: minimum wind speed, maximum hourly wind speed change and maximum hourly wind direction change. In the study, several ranges are defined for these parameters and the effect of the values of these parameters on identifying storms and the resulting wind wave characteristics are given and discussed. Also, in the computation of hourly wind wave characteristics, several approaches are considered. These are briefly listed as; the continuous data, storm-based with user-defined duration and storm-based with storm duration. The results of hourly averaged wind wave characteristics for these approaches are presented with respective error statistics. The best approach is observed to be the storm-based user-defined duration approach. In the study, for the locations considered, it is observed that the user-defined duration is related to the wind climate of the location.

Subject Keywords

Wave Prediction, Parametric Modelling, Coastal engineering

URI

https://hdl.handle.net/11511/97367

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Binalarda Güneş Kontrol Yöntemlerinin Optimizasyon Temelli Performans Değerlendirilmesi Gürsel Dino, İpek (2017-01-01) Bu çalışmada, binalarda farklı güneş kontrol yöntemlerinin karşıtlaştırmalı analizini, bir genetik optimizasyon algoritması ile destekleyen bir tasarım aracı ve yöntem, önerilmektedir. Çalışmada ilk olarak farklı cam alternatifleri ve sıklıkla kullanılan bazı standart gölgeleme yöntemlerinin oluşturduğu sekiz senaryo geliştirilmiştir. Ardından bu senaryolar, örnek bir bina tasarımı üstünde uygulanarak genetik optimizasyon algoritması uygulanmıştır. Algoritma, pencere büyüklüklerini ve gölgelik boyut paramet...
A parallel gas-kinetic Bhatnagar-Gross-Krook method for the solution of viscous flows on two-dimensional hybrid grids Ilgaz, M.; Tuncer, İsmail Hakkı (Informa UK Limited, 2009-01-01) In this study, a parallel implementation of gas-kinetic Bhatnagar-Gross-Krook method on two-dimensional hybrid grids is presented. Boundary layer regions in wall bounded viscous flows are discretised with quadrilateral grid cells stretched in the direction normal to the solid surface while the rest of the flow domain is discretised by triangular cells. The parallel solution algorithm on hybrid grids is based on the domain decomposition using METIS, a graph partitioning software. The flow solutions obtained ...
A new modal superposition method for nonlinear vibration analysis of structures using hybrid mode shapes Ferhatoglu, Erhan; Ciğeroğlu, Ender; Özgüven, Hasan Nevzat (Elsevier BV, 2018-07-01) In this paper, a new modal superposition method based on a hybrid mode shape concept is developed for the determination of steady state vibration response of nonlinear structures. The method is developed specifically for systems having nonlinearities where the stiffness of the system may take different limiting values. Stiffness variation of these nonlinear systems enables one to define different linear systems corresponding to each value of the limiting equivalent stiffness. Moreover, the response of the n...
A Model for Vertical-to-Horizontal Response Spectral Ratios for Europe and the Middle East Bommer, Julian J.; Akkar, Dede Sinan; Kale, Ozkan (2011-08-01) In the framework of probabilistic seismic hazard analysis, the preferred approach for obtaining the response spectrum of the vertical component of motion is to scale the horizontal spectrum by vertical-to-horizontal (V/H) spectral ratios. In order to apply these ratios to scenario or conditional mean spectra, the V/H ratios need to be defined as a function of variables such as magnitude, distance, and site classification. A new model for the prediction of V/H ratios for peak ground acceleration and spectral...
A new method for automated estimation of joint roughness coefficient for 2D surface profiles using power spectral density Unlusoy, Deniz; Süzen, Mehmet Lütfi (Elsevier BV, 2020-01-01) In this study, a new method for the objective and accurate estimation of the joint roughness coefficient (JRC) of surface profiles, which are extracted from terrestrial laser scanner point clouds, is proposed. The requirements of objectivity, accuracy, reliability, and suitability for automatic analysis have been the basic criteria in assessing the performance of the procedure for JRC estimation. The procedure to estimate the JRC value of a sample profile is based on a similarity measure, between the third-...

Citation Formats

P. Emrecan, “A computational tool for wind wave prediction based on CEM method,” M.S. - Master of Science, Middle East Technical University, 2022.