DITCHING

作品数：13被引量：49H指数：4
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相关领域：航空宇航科学技术更多>>
相关作者：宋春艳刘向新赵岩周亚立王亚锋更多>>
相关机构：上海飞机设计研究院中国飞机强度研究所新疆农垦科学院更多>>
相关期刊：《International Journal of Agricultural and Biological Engineering》《Beijing Review》《Science China(Technological Sciences)》《Transactions of Nanjing University of Aeronautics and Astronautics》更多>>
相关基金：中国航空科学基金国家自然科学基金国家教育部博士点基金国家科技支撑计划更多>>
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Design and experiment of the ditching device for wheat seeders capable of ditching sloped drainage furrows in rice-wheat rotation areas
《International Journal of Agricultural and Biological Engineering》2025年第1期154-164,共11页Quanyu Wang Ming Peng Jin He Caiyun Lu Chao Wang Zhenwei Tong 
funded by the China Agriculture Research System of MOF and MARA(Grant No.CARS-03);supported by the 2115 Talent Development Program of China Agricultural University.
To solve the problem of field waterlogging during wheat sowing in rice-wheat rotation areas,which causes sticky and wet soil,thus affecting the growth of wheat,this paper proposed a sloped ditching method based on las...
关键词：rice-wheat rotation laser wheat seeder sloped drainage furrow discrete element method 
Resistance calculation and operational parameter optimization of an opener based on dynamic friction characteristics test of bulk materials
《International Journal of Agricultural and Biological Engineering》2024年第6期121-130,共10页Renqiang Yang Zhengjun Guan Lihua Zhang Yuanhang Xu 
financially supported by China Agriculture Research System(Grant No.CARS-02);Chongqing Science and Technology Bureau Agricultural High Tech Special Project(Grant No.CSTC2019ngzx0017).
Currently,friction characteristics obtained from empirical parameters or soil direct shear tests are widely applied in the resistance calculation and operational parameter optimization of soil tillage components.Howev...
关键词：bulk materials dynamic friction characteristics ditching resistance model operational parameter optimization 
Structural parameter optimization of a furrow opener based on EDEM software被引量：1
《International Journal of Agricultural and Biological Engineering》2024年第3期115-120,共6页Longjie Wang Bin Zhou Chang Wan Ling Zhou 
financially supported by the Xinjiang Key Industry Innovation and Development Support Project(Grant No.2020DB003).
To reduce the ditching resistance of a furrow opener during operation,single-factor and multiple-factor combinations were used to explore the influence of the furrow opener’s advance speed,blade opening angle,and wid...
关键词：furrow opener discrete element OPTIMIZATION ditching resistance 
Numerical Simulation of Cavitation and Ventilation Phenomena During Aircraft Ditching
《Transactions of Nanjing University of Aeronautics and Astronautics》2022年第S01期9-15,共7页CHEN Xingyi LI Meng TONG Mingbo WU Bin ZHANG Xianzheng 
The large eddy simulation(LES)method combined with the global dynamic grid strategy is used to numerically study the influence of pitch angles on cavitation and ventilation phenomena in the rear of fuselage during dit...
关键词：aircraft ditching CAVITATION large eddy simulation(LES) ventilation volume of fluid(VOF) 
Simulations of helicopter ditching using smoothed particle hydrodynamics被引量：3
《Journal of Hydrodynamics》2020年第4期653-663,共11页G.Oger A.Vergnaud B.Bouscasse J.Ohana M.Abu Zarim M.De Leffe A.Bannier L.Chiron Y.Jus M.Gamier S.Halbout D.Le Touze 
Supported by the European Union Horizon 2020 Research and Innovation Program(Grant No.724139);The authors thank the Pole de Calcul et de Donnees Marines(PCDM)for providing DATARMOR storage and computational resources(http://www.ifremer.fr/pcdm),and the Institut de Calcul Intensif(ICI)(Grant No.2018-P1804060).
The present work has been performed in the context of the European H2020 project increased SAfety and Robust certification for ditching of Aircrafts and Helicopters(SARAH)dedicated to improving the safety during aircr...
关键词：Helicopter ditching smoothed particle hydrodynamics(SPH) Free surface impact wave impact numerical vs experimental solutions 
Design and Optimization of Planting Process Parameters for 2ZYX-2 Type Green Onion Ditching and Transplanting Machine被引量：2
《Phyton-International Journal of Experimental Botany》2020年第1期147-166,共20页Jiqiang Zhang Ziru Niu Tianhua Li Yanqiang Wu Rui Xi Yuhua Li Guanghua Li Jialin Hou 
This study was funded by the Technical System of National Characteristic Vegetable Industry(CARS-24-D-01);Vegetable Innovation Team Project of Modern Agricultural Industry Technology System in the Shandong Province(SDAIT-05-11);Shandong Agricultural Machinery Equipment Research and Development Innovation Project(2018YF001-07);the Key Research and Development Program(Major Science and Technology Innovation Project)of the Shandong Province in 2019(2019JZZY010733).
Considering the current low level of mechanization for domestic green onion planting and the high labor intensity of artificial planting,a 2ZYX-2 green onion ditching and transplanting machine,which can complete ditch...
关键词：Agricultural machinery motion analysis green onion EXPERIMENT 
High-speed water impacts of flat plates in different ditching configuration through a Riemann--ALE SPH model被引量：6
《Journal of Hydrodynamics》2018年第1期38-48,共11页S.Marrone A.Colagrossi L.Chiron M.De Leffe D.Le Touzé 
partially received funding from the European Union's Horizon 2020 Research and Innovation Programme (Grant No. 724139)
The violent water entry of flat plates is investigated using a Riemann-arbitrary Eulerian-Lagrangian（ALE） smoothed particle hydrodynamics（SPH） model. The test conditions are of interest for problems related to air...
关键词：Aircraft ditching high-speed water entry smoothed particle hydrodynamics（SPH） 
Dynamics Analysis of Water Ditching of Deformable Helicopter
《Transactions of Nanjing University of Aeronautics and Astronautics》2017年第6期720-732,共13页Sun Xuan Tong Mingbo Wang Zhengzhong 
funded by the International S&T Cooperation Program of China(No.2011DFR80210);the National Natural Science Foundation of China(No.11302105)
To understand the effect of attitude angle on helicopter water ditching,a finite element model(FEM)of helicopter water ditching was established via the nonlinear finite element method.Based on the LS-DYNA software,the...
关键词：water ditching HELICOPTER LS-DYNA SPH method 
Effect of pitch angle on initial stage of a transport airplane ditching被引量：22
《Chinese Journal of Aeronautics》2013年第1期17-26,共10页Guo Baodong Liu Peiqing Qu Qiulin Wang Jiawen 
co-supported by Aeronautical Science Foundation of China (No.20102351023);Research Fund for the Doctoral Program of Higher Education of China (No. 20091102120021)
Airworthiness regulations require that the transport airplane should be proved to ensure the survivability of the ditching for the passengers. The planned ditching of a transport airplane on the calm water is numerica...
关键词：CRASHWORTHINESS Fluid structure interaction HYDRODYNAMICS Multiphase flow Transport aircraft Water landing 
The suction force effect analysis of large civil aircraft ditching被引量：8
《Science China(Technological Sciences)》2012年第10期2789-2797,共9页ZHANG Tao LI Shu DAI HengChao 
supported by the National Natural Science Foundation of China (Grant No. 10772013);the National Technology Research and Development Program of China (Grant No. 2012AA112201);the Aeronautical Science Foundation of China (Grant No. 20100251007)
The research on ditching is indispensable for civil airplanes made in China to obtain the airworthiness certificates.The suction force effect in the ditching process is a hot and difficult research topic.In this paper...
关键词：large civil aircraft DITCHING fluid-solid coupling finite element method（FEM） finite volume method（FVM） suction force 
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