| Observation and dydrodynamic analysis of fast-start of yellow catfish (pelteobagrus fulvidraco) |
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| 作者姓名： | JING Jun YIN Xiezhen LU Xiyun |
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| 作者单位： | Department of Modern Mechanics, University of Science and Technology of China, Anhui 230026, China,Department of Modern Mechanics, University of Science and Technology of China, Anhui 230026, China,Department of Modern Mechanics, University of Science and Technology of China, Anhui 230026, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Grant Nos. 10332040 and 10072063), and the Innovation Project of the Chinese Academy of Sciences (Grant No. KJCX-SW-L04) |
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| 摘 要： | The kinematics and hydrodynamics of the escape response of yellow catfish ( Pelteobagrus fulvidraco ) is investigated.It is observed from digital high-speed camera that all the escape response of yellow catfish is a C-type fast-start, which is characterized by the C-shape of the fish body at the end of the first contraction of the lateral musculature. Based on the analysis of the mass center movement and the performance of the caudal fin, the fast-start process can be divided into two stages: in stage one the fish body rotates rapidly around its mass center and in stage two the fish begins moving straightly. Theoretically, the Weihs' model is employed to obtain the forces, moments and turning angular accelerations acting on the fish during the escape response. The results are in good agreement with the experimental observation. Furthermore, muscle strain at different locations along the body is calculated. At last, the dynamical performance of the escape response is explained.
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| 关 键 词： | fast-start maneuver yellow catfish digital high-speed camera Weihs'model muscle strain |
Observation and dydrodynamic analysis of fast-start of yellow catfish (pelteobagrus fulvidraco) |
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| JING Jun,YIN Xiezhen,LU Xiyun.Observation and dydrodynamic analysis of fast-start of yellow catfish (pelteobagrus fulvidraco)[J].Progress in Natural Science,2005,15(1):34-40. |
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| Authors: | JING Jun YIN Xiezhen LU Xiyun |
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| Institution: | Department of Modern Mechanics, University of Science and Technology of China, Anhui 230026, China,Department of Modern Mechanics, University of Science and Technology of China, Anhui 230026, China,Department of Modern Mechanics, University of Science and Technology of China, Anhui 230026, China |
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| Abstract: | The kinematics and hydrodynamics of the escape response of yellow catfish ( Pelteobagrus fulvidraco ) is investigated.It is observed from digital high-speed camera that all the escape response of yellow catfish is a C-type fast-start, which is characterized by the C-shape of the fish body at the end of the first contraction of the lateral musculature. Based on the analysis of the mass center movement and the performance of the caudal fin, the fast-start process can be divided into two stages: in stage one the fish body rotates rapidly around its mass center and in stage two the fish begins moving straightly. Theoretically, the Weihs' model is employed to obtain the forces, moments and turning angular accelerations acting on the fish during the escape response. The results are in good agreement with the experimental observation. Furthermore, muscle strain at different locations along the body is calculated. At last, the dynamical performance of the escape response is explained. |
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| Keywords: | fast-start maneuver yellow catfish digital high-speed camera Weihs'model muscle strain |
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