Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
New Fish Reef Block Ensuring Accurate Placement by Free-Fall Method
A new fish reef block ensuring accurate placement by a free fall was developed to enable a more economical construction of nursery reefs for snow crabs. The block is based on a cube-shaped frame structure with extra shelf areas attached to the upper and lower frames to act as stabilizers. The falling behavior of the block in water was investigated by hydraulic model experiments and three-dimensional (3D) numerical computations. A stochastic model based on the experimental data was used to confirm a narrow distribution of the placement position as a result of the swing motion of the block during its fall. The numerical computation results indicate that the upper stabilizer produces a restoring moment for a tilted block and the lower stabilizer reduces instability in the wake of the falling block. In addition, a quick estimation method for the placement position was developed to determine the release point of the block during actual construction in the presence of ambient currents.
New Fish Reef Block Ensuring Accurate Placement by Free-Fall Method
A new fish reef block ensuring accurate placement by a free fall was developed to enable a more economical construction of nursery reefs for snow crabs. The block is based on a cube-shaped frame structure with extra shelf areas attached to the upper and lower frames to act as stabilizers. The falling behavior of the block in water was investigated by hydraulic model experiments and three-dimensional (3D) numerical computations. A stochastic model based on the experimental data was used to confirm a narrow distribution of the placement position as a result of the swing motion of the block during its fall. The numerical computation results indicate that the upper stabilizer produces a restoring moment for a tilted block and the lower stabilizer reduces instability in the wake of the falling block. In addition, a quick estimation method for the placement position was developed to determine the release point of the block during actual construction in the presence of ambient currents.
New Fish Reef Block Ensuring Accurate Placement by Free-Fall Method
Mitsui, Jun (Autor:in) / Nadaoka, Kazuo (Autor:in) / Ogata, Shin-ichi (Autor:in) / Shibata, Sanae (Autor:in) / Yamamoto, Masato (Autor:in) / Matsumoto, Akira (Autor:in)
Journal of Waterway, Port, Coastal, and Ocean Engineering ; 139 ; 455-465
16.04.2013
112013-01-01 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
New Fish Reef Block Ensuring Accurate Placement by Free-Fall Method
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