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| 1 | Influences of different forces on the bubble entrainment into a stationary Gaussian vortex显示文摘Simulations of bubble entrainment into a stationary Gaussian vortex are performed by using the combined particle tracking method(PTM)and boundary element method(BEM).Before the bubble is captured by the vortex core,oscillation and migration of the quasi-spherical nucleus are solved by using improved RP equation and the momentum theorem in the Lagrangian reference frame simultaneously,and the trajectory of the nucleus presents a kind of reduced helix shape.After captured by the vortex core,the bubble grows immediately and moves and deforms along the vortex core axis.The non-spherical evolution and deformation of the bubble is simulated by adopting a mixed Eulerian-Lagrangian method.The output of quasi-spherical stage is taken as the input of non-spherical stage,and all the behaviors of the entrained bubble can be simulated such as inception,motion,deformation and split.Numerical results agree well with published experimental data.On this basis,the influences of various factors such as viscosity,surface tension,buoyancy are studied systemically.Hopefully the results from this paper would provide some insight into the control on vortex bubble entrainment. | ZHANG AMan NI BaoYu | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，11： | 15 |
| 2 | Comparison between the 3D numerical simulation and experiment of the bubble near different boundaries显示文摘Based on the potential flow theory, the vortex ring is introduced to simulate the toroidal bubble, and the boundary element method is applied to simulate the evo- lution of the bubble. Elastic-plasticity of structure being taken into account, the interaction between the bubble and the elastic-plastic structure is computed by combining the boundary element method (BEM) and the finite element method (FEM), and a corresponding 3D computing program is developed. This program is used to simulate the three-dimensional bubble dynamics in free field, near wall and near the elastic-plastic structure, and the numerical results are compared with the existing experimental results. The error is within 10%. The effects of different boundaries upon the bubble dynamics are presented by studying the bubble dy- namics near different boundaries. | ZHANG AMan YAO XiongLiang LI Jia GUO Jun | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，12： | 4 |
| 3 | The Evalua- tion Method of Total Damage to Ship in Underwater Explosion 显示文摘 | Zhang Aman Zeng Lingyu Cheng Xiaoda | 2011 | Applied Ocean Research2011，33，： | 1 |
| 4 | Use of a submodel method to check the bolt strength of marine equipment 显示文摘 | XU ShanShan LIU ShiMing GUO ShaoJing ZHANG AMan | 2009 | Journal of Marine Science and Application2009，8，： | 1 |
| 5 | Nu- merical simulation of column charge underwater explosion based on SPH and BEM combination显示文摘 | ZHANG Aman YANG Wenshan HUANG Chao | 2013 | Computers & Flu- ids2013，71，： | 1 |
| 6 | In- fluences of initial and boundary conditions on underwater ex- plosion bubble dynamics 显示文摘 | ZHANG Aman WANG Shiping HUANG Chao | 2013 | European Journal of Mechan- ics-B/Fluids2013，42，： | 1 |
| 7 | Dynamic response of the non-contact underwater explo- sions on naval equipment 显示文摘 | ZHANG Aman ZHOU Weixing WANG Shiping | 2011 | Marine Structures2011，24，39： | 1 |
| 8 | Numerical analysis of the bubble jet impact on a rigid wall 显示文摘 | LI Shuai H Yunbo ZHANG Aman | 2015 | Applied Ocean Research2015，50，： | 1 |
| 9 | Dynamic response of the non-contact underwater explosions on naval equipment显示文摘 | ZHANG Aman ZHOU Weixing WANG Shiping | 2011 | Marine Structures 24(4)2011，，： | 1 |
| 10 | Numerical simulation of underwater contact explosion显示文摘 | ZHANG Aman YANG Wenshan YAO Xiongliang | 2012 | Applied Ocean Research2012，34，： | 1 |
| 11 | Nu- merical simulation of underwater contact explosion显示文摘 | ZHANG Aman YANG Wenshan YAO Xinngliang | 2012 | Ap- plied Ocean Research2012，34，： | 1 |
| 12 | Dynamic response of the non-contact underwater explosions on naval equipment显示文摘 | Zhang Aman Zhou Weixing Wang Shiping Feng Linhan | 2011 | Marine Structures2011，，4： | 1 |
| 13 | The highly efficient calculation method of 3D frequency -domain Green function显示文摘 | Chen Hailong Zhang Aman Sun Shili | 2010 | Key Engineering Materials2010，，： | 1 |
| 14 | Experimental study on sound radiation time-frequency characteristics of double cylindrical shell based on EMD显示文摘 | Fang Ji Xiongliang Yao Aman Zhang Xi Ye | 2012 | Engineering Computations2012，，3： | 1 |
| 15 | Numerical simulation of underwater contact explosion显示文摘 | Zhang Aman Yang Wenshan Yao Xiongliang | 2012 | Applied OceanResearch2012，34，： | 1 |
| 16 | Enhanced design of hourglass truss sandwich structures for compressive resistance显示文摘In this article,the design of the hourglass truss sandwich structure is improved by optimizing the number of layers to enhance the compressive strength of both the core and the face sheet and then its mechanical performance. The hourglass truss structures characterized by three different numbers of layers are manufactured using an interlocking and vacuum brazing method. The effect of the layer number of the hourglass core panels on their out-of-plane compression and in-plane compression performance is investigated,and the results from calculations and experiments are in reasonable agreement. The results show that as the layer number of the hourglass core increases,the out-of-plane compressive strengths show little change,but their energy absorption properties are effectively increased. The in-plane compressive failure mechanism maps are constructed,and the specimens are designed to examine the local elastic and inelastic buckling failure modes of the face sheets. The results suggest that as the number of layers of the hourglass core increases,its maximum in-plane compressive load increases. The maximum in-plane compressive loads of the two-layer hourglass truss panels are 57%–70% higher than those of the single-layer panels. It can also be concluded that the out-of-plane and in-plane compression mechanical properties of the multilayer hourglass truss outperform those of the pyramidal truss. Furthermore,the number of layers of the hourglass core is optimized in consideration of both mechanical properties and fabrication cost. | FENG LiJia YU GuoCai MA Li WU LinZhi ZHANG AMan | 2020 | Science China(Technological Sciences)2020，63，12： | 0 |
| 17 | Robust ensemble of metamodels based on the hybrid error measure显示文摘Metamodels have been widely used as an alternative for expensive physical experiments or complex,time-consuming computational simulations to provide a fast but accurate analysis.However,challenge remains in the prior determination of the most suitable metamodel for a particular case because of the lack of information about the actual behavior of a system.In addition,existing studies on metamodels have largely restricted on solving deterministic problems(e.g.,data from finite element models),whereas some real-life engineering problems(e.g.,data from physical experiment)are stochastic problems with noisy data.In this work,a robust ensemble of metamodels(EMs)is proposed by combining three regression stand-alone metamodels in a weighted sum form.The weight factor is adaptively determined according to the hybrid error metric,which combines global and local error measures to improve the accuracy of the EMs.Furthermore,three typical individual metamodels that can filter noise are selected to construct the EMs to extend their application in practical engineering problems.Three well-known benchmark problems with different levels of noise and three engineering problems are used to verify the effectiveness of the proposed EMs.Results show that the proposed EMs have higher accuracy and robustness than the individual metamodels and other typical EMs in major cases. | Shuai HUANG Bo WU Xin ZHANG Aman ELMI Youmin HU Wenwen JIN | 2021 | Frontiers of Mechanical Engineering2021，16，3： | 0 |
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