Mohammad Reza Fallah Nezhad; Mehdi Behdarvandi Askar
Abstract
Overtopping and diffractin of waves are among the hydrodynamic reactions to shore protection structures, which can interfere with the operation and unrest of ports. In order to reduce the effect of hydrodynamic reactions on the coast, in this research, using flow 3D software and numerical modeling, the ...
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Overtopping and diffractin of waves are among the hydrodynamic reactions to shore protection structures, which can interfere with the operation and unrest of ports. In order to reduce the effect of hydrodynamic reactions on the coast, in this research, using flow 3D software and numerical modeling, the effect of constructing a submerged breakwater in front of rubble mound breakwater and changes in geometric parameters including structural slope, constructtion distans, the depth of submerged and the type of armor has been addressed. The non-linear waveforms with the Jonswap spectrum and the number of modes examined are 72 different models. The outputs from modeling were analyzed after drawing tables and shapes. The results showed that decreasing the gradient of the structure and the depth of submergence and increasing the distance between the constructions of the submerged breakwater has the greatest effect on the decrease of the Overtopping and diffractin of the waves. Also, tetrapod type armored vehicles in the submerged breakwater have the highest reduction in Overtopping and diffractin of waves in rubble mound breakwater in comparison to cubic and antifer armor.
مهندسی دریا
Amir Zarepour; Mehdi Behdarvandi Askar; Saham-eddin Cheraghi; vahid Zareii
Abstract
The aim of this research is to investigate the hydrodynamic status of Mahshahr export port. Initially, the modeling of tidal streams in the starting point of Khurmousa by the tidal inputs of Rahnamaian station was performed in logical manner and the results obtained from the inner point of Khurmousa ...
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The aim of this research is to investigate the hydrodynamic status of Mahshahr export port. Initially, the modeling of tidal streams in the starting point of Khurmousa by the tidal inputs of Rahnamaian station was performed in logical manner and the results obtained from the inner point of Khurmousa was calibrated with inputs from Imam Khomeini station port and satisfactory results were achieved. During the next stage, by considering the main aim of this research, a model specific to the area of export port of Mahshar was developed. Based on the results from field measurements and the results obtained from the model, the tidal amplitude balance in export port of Mahshahr is 4.25 meters, the maximum annual ebb is 2.25 meters and the annual minimum is 2 meters. The velocity of tidal streams in Mahshahr export port parallel to the channel and during the most part of the year is between 0.5 to 1 meters per second. The pattern of tidal streams is constant throughout the year and experiences no changes