With the incorporation of total Lagrangian smoothed particle hydrodynamics（SPH） method equation and moving least square（MLS） function,the traditional SPH method is improved regarding the stability and consistency....With the incorporation of total Lagrangian smoothed particle hydrodynamics（SPH） method equation and moving least square（MLS） function,the traditional SPH method is improved regarding the stability and consistency.Based on Mindlin-Ressiner plate theory,the SPH method simulating dynamic behavior via one layer of particles is applied to plate＇s mid-plane,i.e.,a SPH shell model is constructed.Finally,through comparative analyses on the dynamic response of square,stiffened shells and cylindrical shells under various strong impact loads with common finite element software,the feasibility,validity and numerical accuracy of the SPH shell method are verified.Consequently,further researches on SPH shell may well pave the way towards solving problems involving dynamic plastic damage,tearing or even crushing.展开更多
The water entry is a classic fluid-structure interaction problem in ocean engineering.The prediction of impact loads on structure during the water entry is critical to some engineering applications.In this paper,a mul...The water entry is a classic fluid-structure interaction problem in ocean engineering.The prediction of impact loads on structure during the water entry is critical to some engineering applications.In this paper,a multiphase Riemann-SPH model is developed to investigate water entry problems.In this model,a special treatment,a cut-off value for the particle density,is arranged to avoid the occurrence of negative pressure.A remarkable advantage of the present multiphase SPH model is that the real speed of sound in air can be allowed when simulating water-air flows.In the present work,considering the air effect,several typical water entry problems are studied,and the evolution of multiphase interface,the motion characteristic of structure and complex fluid-structure interactions during the water entry are analyzed.Compared with the experimental data,the present multiphase SPH model can obtain satisfactory results,and it can be considered as a reliable tool in reproducing some fluid-structure interaction problems.展开更多
Correction to:Adv Aerodyn 3,13(2021)https://doi.org/10.1186/s42774-021-00066-x After publication of this article[1],it is noticed the article contained some errors.The details are listed below:(1)Page 3:In the sentenc...Correction to:Adv Aerodyn 3,13(2021)https://doi.org/10.1186/s42774-021-00066-x After publication of this article[1],it is noticed the article contained some errors.The details are listed below:(1)Page 3:In the sentence‘ca and cb denote the sound of speed of particles a and b,respectively.’,‘sound of speed’should be corrected to‘speed of sound’.(2)Page 4:In the sentence‘whereρ0 and c0 denote the initial density and the artificial sound of speed,respectively.’,‘sound of speed’should be corrected to‘speed of sound’。展开更多
基金supported by the Llyod’s Register Educational Trust (The LRET)the National Natural Science Foundation of China (50939002)the Excellent Young Scientists Fund (51222904)
文摘With the incorporation of total Lagrangian smoothed particle hydrodynamics（SPH） method equation and moving least square（MLS） function,the traditional SPH method is improved regarding the stability and consistency.Based on Mindlin-Ressiner plate theory,the SPH method simulating dynamic behavior via one layer of particles is applied to plate＇s mid-plane,i.e.,a SPH shell model is constructed.Finally,through comparative analyses on the dynamic response of square,stiffened shells and cylindrical shells under various strong impact loads with common finite element software,the feasibility,validity and numerical accuracy of the SPH shell method are verified.Consequently,further researches on SPH shell may well pave the way towards solving problems involving dynamic plastic damage,tearing or even crushing.
基金supported by the National Numerical Wind Tunnel Project(NNW2018-ZT2B05)the China National Funds for Distinguished Young Scientists(51925904)the PhD Student Research and Innovation Fund of the Fundamental Research Funds for the Central Universities(3072020GIP0101).
文摘The water entry is a classic fluid-structure interaction problem in ocean engineering.The prediction of impact loads on structure during the water entry is critical to some engineering applications.In this paper,a multiphase Riemann-SPH model is developed to investigate water entry problems.In this model,a special treatment,a cut-off value for the particle density,is arranged to avoid the occurrence of negative pressure.A remarkable advantage of the present multiphase SPH model is that the real speed of sound in air can be allowed when simulating water-air flows.In the present work,considering the air effect,several typical water entry problems are studied,and the evolution of multiphase interface,the motion characteristic of structure and complex fluid-structure interactions during the water entry are analyzed.Compared with the experimental data,the present multiphase SPH model can obtain satisfactory results,and it can be considered as a reliable tool in reproducing some fluid-structure interaction problems.
文摘Correction to:Adv Aerodyn 3,13(2021)https://doi.org/10.1186/s42774-021-00066-x After publication of this article[1],it is noticed the article contained some errors.The details are listed below:(1)Page 3:In the sentence‘ca and cb denote the sound of speed of particles a and b,respectively.’,‘sound of speed’should be corrected to‘speed of sound’.(2)Page 4:In the sentence‘whereρ0 and c0 denote the initial density and the artificial sound of speed,respectively.’,‘sound of speed’should be corrected to‘speed of sound’。
