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大石涧水库溢流特性与坝下河道冲刷模型试验研究 被引量:5
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作者 张桂花 刘少斌 刘欣 《水电能源科学》 北大核心 2021年第2期74-77,共4页
基于物理模型试验探讨了大石涧水库溢流坝的溢流特性及不同洪水工况下坝下河道冲刷特性,发现大石涧水库溢流表孔体型设计合理,泄流能力满足设计要求;溢流堰面压强分布合理,最小负压值满足规范要.求,不易发生空蚀破坏;采用连续鼻坎挑流消... 基于物理模型试验探讨了大石涧水库溢流坝的溢流特性及不同洪水工况下坝下河道冲刷特性,发现大石涧水库溢流表孔体型设计合理,泄流能力满足设计要求;溢流堰面压强分布合理,最小负压值满足规范要.求,不易发生空蚀破坏;采用连续鼻坎挑流消能,对泄水建筑物的安全性无影响,但受两岸回流影响,下游护坦末端在小流量条件下会产生冲刷;下游河道主流偏右岸,坝下230~300 m范围护坡处出现淘刷,最大深度3~4 m。结果可为溢流堰的体型优化设计提供技术支持。 展开更多
关键词 大石涧水库 溢流坝 模型试验 挑流消能 河道冲刷
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Marine Predator Algorithm-based Sliding Mode Control of a Novel Motion Simulator for High Column Sloshing Experiments
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作者 DU Zun-feng CHEN Xiang-yu +2 位作者 BAI Hao ZHU Hai-ming HAN Mu-xuan 《船舶力学》 EI CSCD 北大核心 2024年第12期1835-1848,共14页
Sloshing experiment is crucial to determine the reaction performance of regeneration columns on an offshore floating platform.A novel type of column motion simulating device and a Marine Predator Algorithm-based Slidi... Sloshing experiment is crucial to determine the reaction performance of regeneration columns on an offshore floating platform.A novel type of column motion simulating device and a Marine Predator Algorithm-based Sliding Mode Controller(MPA-SMC)are proposed for such sloshing experiments.The simulator consists of a Stewart platform and a steel framework.The Stewart platform is located at the column's center of gravity(CoG)and supported by the steel framework.The platform's hydraulic servo system is controlled by a sliding mode controller with parameters optimized by MPA to improve robustness and precision.A numerical sloshing experiment is conducted using the proposed device and controller.The results show that the novel motion simulator has lower torque during the column sloshes,and the proposed controller performs better than a well-tuned PID controller in terms of target tracking precision and anti-interference capability. 展开更多
关键词 regeneration column sloshing experiment motion simulator Stewart platform sliding mode control marine predator algorithm
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