مهندسی عمران-سازه های هیدرولیکی
Omid Karbasi; Hassan Akbari
Abstract
Sea transportation is one of the main methods of moving goods between different countries in the world. In this regard, ports play an extremely important role and breakwaters are very important as the main structure of coastal protection. There are different types of breakwaters, including traditional ...
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Sea transportation is one of the main methods of moving goods between different countries in the world. In this regard, ports play an extremely important role and breakwaters are very important as the main structure of coastal protection. There are different types of breakwaters, including traditional rock mass breakwaters, platform breakwaters, vertical breakwaters, combined breakwaters, and special breakwaters. Due to cost reduction in construction, caisson breakwaters are used in deep waters. In the design and construction of these breakwaters, the reflection coefficient, wave overtopping and stability of the breakwater are important issues that make designers face many challenges. In order to improve the performance of caissons, various solutions have been proposed by researchers, among them Jarlan caissons in which perforated plates were placed in front of the caisson. In the following, after presenting the solution of creating holes on the front face of the caisson, many researchers have evaluated various variables to obtain the optimal plan in this regard. The collection of these researches confirm the optimal performance of caisson breakwaters with holes and some of them suggest new geometries on how to create holes. This optimized performance includes both better hydraulic response and, in some cases, reduced forces, which will improve stability. At the same time, other researches have been conducted on breakwaters without holes, and researchers have tried to improve their performance by changing the geometry of these caissons.
مهندسی عمران-سازه های هیدرولیکی
Omid Karbasi
Abstract
Numerical studies provide researchers with favorable facilities for research to investigate various cases. In conventional modeling, there are two approaches, Lagrangian and Eulerian. In the Eulerian approach with fixed meshing of the environment, the fluid flow enters the environment and then various ...
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Numerical studies provide researchers with favorable facilities for research to investigate various cases. In conventional modeling, there are two approaches, Lagrangian and Eulerian. In the Eulerian approach with fixed meshing of the environment, the fluid flow enters the environment and then various variables are investigated, but in the Lagrangian approach, the mesh is placed on the fluid particles and this causes the movement of the mesh along with the fluid. Smooth particle hydrodynamics (SPH) is a Lagrangian approach that has been favored by researchers in various engineering fields in recent years. This approach, which is based on kernel function interpolation, can consider compressible and incompressible fluid. The development of this method has accelerated more than before in view of removing the limitations and errors in its modeling in the past years. In this process, improved solvers and methods have been presented, including SPHysics and DualSPHysics. In the field of marine structures engineering, the investigation of the hydraulic response of breakwaters such as the overttoping and reflection coefficient and the force acting on breakwaters and pipelines is one of the application cases of smooth particle hydrodynamics. By improving the performance of this method, it is now possible to simulate porous environments, which creates a powerful tool in the hands of researchers. In this article, in order to better understand the limitations and possibilities of this method, its development in recent years has been examined and its applications in the fields related to marine structures have been reviewed in order to identify its weaknesses and strengths and its uses, other researches To be carried out in the continuation of research processes.
