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- 저자 : Hongbin Gui (검색결과 3 건)
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Zhanyang Chen,Hongbin Gui,Pingsha Dong,Changli Yu 대한조선학회 2019 International Journal of Naval Architecture and Oc Vol.11 No.1
Investigation of hydroelastic responses of high-speed vessels in irregular sea state is of major interest in naval applications. A three dimensional nonlinear time-domain hydroelastic method in oblique irregular waves is developed, in which the nonlinear hydrostatic restoring force caused by instantaneous wetted surface and slamming force are considered. In order to solve the two technical problems caused by irregular sea state, the time-domain retardation function and Proportional, Integral and Derivative (PID) autopilot model are applied respectively. Besides, segmented model tests of a high-speed trimaran in oblique waves are performed. An oblique wave testing system for trimarans is designed and assembled. The measured results of main hull and cross-decks are analyzed, and the differences in distribution of load responses between trimarans and monohull ships are discussed. Finally, from the comparisons, it is confirmed that the present concept for dealing with nonlinear hydroelastic responses of ships in oblique irregular waves is reliable and accurate.
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Chen, Zhanyang,Gui, Hongbin,Dong, Pingsha,Yu, Changli The Society of Naval Architects of Korea 2019 International Journal of Naval Architecture and Oc Vol.11 No.1
Investigation of hydroelastic responses of high-speed vessels in irregular sea state is of major interest in naval applications. A three dimensional nonlinear time-domain hydroelastic method in oblique irregular waves is developed, in which the nonlinear hydrostatic restoring force caused by instantaneous wetted surface and slamming force are considered. In order to solve the two technical problems caused by irregular sea state, the time-domain retardation function and Proportional, Integral and Derivative (PID) autopilot model are applied respectively. Besides, segmented model tests of a high-speed trimaran in oblique waves are performed. An oblique wave testing system for trimarans is designed and assembled. The measured results of main hull and cross-decks are analyzed, and the differences in distribution of load responses between trimarans and monohull ships are discussed. Finally, from the comparisons, it is confirmed that the present concept for dealing with nonlinear hydroelastic responses of ships in oblique irregular waves is reliable and accurate.
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Combustion Simulation of Variable Altitude Turbocharged Diesel Engine Using SVM
Jing Qi,Luo Qingguo,Gui Yong,Liu Hongbin 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.4
The combustion characteristics of a turbocharged diesel engine in a plateau environment have always been a focus of research on diesel engine power recovery. However, the influence of altitude on the empirical parameters of the combustion model has rarely been addressed in the literature. This paper presents a zero-dimensional combustion modeling method based on support vector machine (SVM). Taking a diesel engine as an example, the heat release rate data under different working conditions were measured on the test bench of a diesel engine at variable altitude. An SVM model was constructed and trained to predict the empirical parameters of the combustion model under varying altitude conditions, and the working process of the diesel engine was simulated. The results show that the working process simulation model with SVM prediction has better predictability. When the altitude increases, the average cylinder pressure and maximum pressure both decrease, the cylinder temperature and maximum temperature both increase, the combustion start point lags, and the combustion duration increases.
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