2024-03-28T10:48:57Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/3802022-11-17T02:08:08Zhdl_2115_20049hdl_2115_141Validity and visualization of a numerical model used to determine dynamic configurations of fishing nets網地の形状と運動に関する数値計算モデルの妥当性と可視化についてSuzuki, KatsuyaTakagi, TsutomuShimizu, TakashiHiraishi, TomonoriYamamoto, KatsutaroNashimoto, Katsuakifishing gearlumped mass modelnumerical simulationsupple net665.6網漁具の水中での形状や運動を推定できる数値シミュレーション手法を開発するために,本報では前報で示された計算用モデルの妥当性を検証する。実験では定常流中に3種類の長方形の平面網地を設置し,流速を変化させながら網形状と網糸に作用する荷重を計測した。網地形状の計算結果はどのケースでも実物と非常に良く一致した。平面網地上辺に作用する荷重は計算結果と良い一致を示した。網糸張力の分布状況についても,実験結果と概ね一致した。これらの結果は本計算モデルが網漁具の形状や運動を推定するのに十分有効であることを示す。The aim of the present study was to develop a numerical calculation method to simulate the three-dimensional dynamic behavior of fishing nets. In a previous study, we presented a formulation to calculate net configurations. In this method, fishing nets were modeled as a group of lumped mass points interconnected with springs that have no mass. To verify the validity of calculation results using a computational model, we performed the flume tank experiments with a rectangular net and compared results with those of the numerical simulation of experiments. Using our method, numerical calculations for a rectangular net in a steady flow can provide accurate results. The calculated load and tension force distribution of the flat net were generally in accordance with the results of the flume tank experiments. This study shows that our method is valid for the simulation of fishing nets; furthermore, we have resolved earlier problems that were associated with this model.Blackwell PublishingJournal Articleapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/2115/380https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/380/4/FS_69_695-705_2003_Fig.pdfhttps://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/380/5/FS_69_695-705_2003_Table.pdfhttps://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/380/6/FS_69_695-705_2003_Text.pdf09199268Fisheries Science6946957052003-08enginfo:doi/10.1046/j.1444-2906.2003.00676.x© 2003 公益社団法人日本水産学会author