Development of a Semi-Analytical Dynamic Force Model

Author:

Akter Marin1,Alim Mohammad Abdul1,Hussain Md. Manjurul2,Mita Kazi Shamsunnahar3,Haque Anisul2,Rahman Md. Munsur2,Rahman Md. Rayhanur2

Affiliation:

1. Department of Mathematics, Bangladesh University of Engineering and Technology, BANGLADESH

2. Institute of Water and Flood Management, Bangladesh University of Engineering and Technology, BANGLADESH

3. Civil, Environmental and Ocean Engineering Department, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA

Abstract

A moving water mass generates force which is exerted on its moving path. Cyclone generated storm surge or earthquake generated tsunami are specific examples of moving water mass generated force along the coasts. In addition to human lives, these moving water masses cause severe damages to the coastal infrastructure due to tremendous force exerted on these structures. To assess the damage on these infrastructures, an essential parameter is the resultant force exerted on these structures. To evaluate the damages, there is hardly any quantitative method available to compute this force. In this paper we have developed a semi-analytical model, named as Dynamic Force Model (DFM), by using Variational Iteration Method to compute this force. We have derived the governing equation on the basis of Saint-Venant equations which are basically 1D shallow water equations derived from the Navier-Stokes equations. DFM is verified, calibrated, validated, and applied in Bangladesh coastal zone to compute dynamic thrust force due to tropical cyclone SIDR.

Publisher

World Scientific and Engineering Academy and Society (WSEAS)

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