scholarly journals Research on numerical simulation and intelligent computing of vehicle wading driving by smooth particle hydrodynamics method

2021 ◽  
Vol 2083 (4) ◽  
pp. 042091
Author(s):  
Wei Zhang ◽  
Peigang Jiao ◽  
Qinzhong Hou
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Test Site ◽  
Theoretical Research ◽  
Smooth Particle Hydrodynamics ◽  
Sph Method ◽  
Intelligent Computing ◽  
Simulation Process ◽  
Particle Hydrodynamics

Abstract The method based on Smooth Particle Hydrodynamics (SPH) is a meshless method which is widely used at present. Its advantage is that it can effectively improve the mesh distortion when finite element is used to deal with large deformation, and its particle characteristics are suitable to deal with the simulation problem of fluid. Based on the actual vehicle wading test site and the actual parameters of the vehicle, combined with the actual situation and theoretical basis, the SPH method is used for numerical simulation analysis of the vehicle wading problem. By comparing the simulation process with the actual water changes during wading, the feasibility of using SPH method in vehicle wading application is proved. In the simulation process of vehicle wading driving, under the condition of constant water level, by setting different wading speeds of vehicle, the flow law and change mechanism of water free surface are analyzed, which are of great significance in theoretical research and engineering application research.

Numerical Simulation of the Protection System of Explosive Reaction Armor

2013 ◽  
Vol 760-762 ◽  
pp. 2188-2193
Author(s):  
Wen Hua Chu ◽  
Aman Zhang ◽  
Xiong Liang Yao
Keyword(s):  
Numerical Simulation ◽  
Smoothed Particle Hydrodynamics ◽  
Approximate Formula ◽  
Engineering Application ◽  
Extreme Conditions ◽  
Sph Method ◽  
Particle Hydrodynamics ◽  
Sph Model ◽  
Smoothed Particle ◽  
Explosive Reaction

There are some extreme conditions in the process of metallic jet penetrating the explosive reaction armor (ERA), such as high instantaneity, large deformation, et al. Based on the smoothed particle hydrodynamics (SPH) method, the generalized density approximate formula is proposed and the Held criterion is introduced. Then the numerical SPH model of metallic jet penetrating the explosive reaction armor is built to study its protection mechanics. The calculation result meets well with the theoretical value. The influences of some parameters, such as thickness of plate and attacking angle, on the protecting effect of explosive reaction armor are analyzed, aiming at providing references for the related engineering application.

Simulation Analysis and Material Optimization of an Aircraft Wing Leading Edge When Subjected to an Artificial Bird Strike

2015 ◽  
Vol 10 (5) ◽  
Author(s):  
K. Srinivasan ◽  
Channankaiah ◽  
George P. Johnson
Keyword(s):  
Simulation Analysis ◽  
Leading Edge ◽  
Primary Objective ◽  
Impact Behavior ◽  
Bird Strike ◽  
Smooth Particle Hydrodynamics ◽  
Sph Method ◽  
Material Optimization ◽  
Particle Hydrodynamics ◽  
The Impact

Bird strike resistance is a strict certification requirement in aircraft industries, and the Federal Aviation Regulations specifically gives various specifications to be followed for certification of various parts of the aircraft. The primary objective of this research is to develop a methodology, which can be utilized to certify an aircraft for bird strike using computational methods, and the impact behavior of a 4-lb artificial bird impinging on the wing leading edge is performed using smooth particle hydrodynamics (SPH) method. The study is focused on the most-frequently used bird configuration in the literatures: namely, cylinder with hemispherical ends. The skin is modeled with an aluminum 2014 alloy, which is prominently used in aircraft industries, and aluminum 8090 alloy. The effects of impact on these materials are studied.

Study on Microscopic Mechanism for Sand Particles Lift-Off

2011 ◽  
Vol 211-212 ◽  
pp. 1147-1151
Author(s):  
A Fang Jin ◽  
Zhi Chun Yang ◽  
Mamtimin Gheni
Keyword(s):  
Numerical Simulation ◽  
Air Flow ◽  
Particle Dispersion ◽  
Sph Method ◽  
Two Phase ◽  
Microscopic Mechanism ◽  
Particle Hydrodynamics ◽  
Sph Model ◽  
Sand Particles ◽  
Lift Off

Smoothed particle hydrodynamics (SPH) method is used to simulate the lift-off phenomenon of sand particles in the air flow. Whether the sand particles make any form of movement in the air flow, firstly, they always jump into the air from a standstill condition, so it is helpfull to understand the saltation mechanism of sand particles. Because the computitional region is discreted into particles in the SPH method, the movement of each particle can represent the machnical behavior of sand particles if the particle dispersion has the same characteristic with the sand particles. The foundmental theory of SPH method and its key elements are reviewed in detail, such as the kernel function, the choice of smoothing length and their influence on the numerical simulation results.In this study a numerical simulation model of wind-blown sand two-phase flow using SPH model is proposed and then the model is discreted to simulate the take-off process of sand particles with adquate boundary conditions. Simulation results show that the proposed model can be used to simulate the dynamic characteristics of sand particles in lift-off.

Computational Aspects of Submarine Slide Generated Tsunami

2014 ◽  
Vol 567 ◽  
pp. 216-221 ◽  
Author(s):  
Vo Nguyen Phu Huan ◽  
Indra Sati Hamonangan Harahap
Keyword(s):  
Incompressible Flows ◽  
Smooth Particle Hydrodynamics ◽  
Sph Method ◽  
Simulation Methodology ◽  
Submarine Slide ◽  
Tsunami Waves ◽  
Impact Forces ◽  
Particle Hydrodynamics ◽  
Computational Aspects ◽  
The Impact

Submarine landslide is the most serious threat on both local and regional scales. Tsunami phenomenon induced by submarine slide has put us on the challenge in understanding from generation mechanism to propagation and coastal inundation and mitigating the risk from submarine slide generated tsunami. This research presents the numerical simulation methodology by Smooth Particle Hydrodynamics (SPH) to investigate the impact forces of tsunami waves with the aid of physical modeling. By using parallelSPHysics, it is a source code based on the SPH method to model nearly‐incompressible flows, including various physical processes. The conclusions may potentially be taken as guideline of mitigate the risk from tsunami wave.

Research Status of Local Stability in the Web of Castellated Components

2013 ◽  
Vol 291-294 ◽  
pp. 1117-1121
Author(s):  
Wen Qian Yin ◽  
Lian Guang Jia ◽  
Bo Shao
Keyword(s):  
Numerical Simulation ◽  
Cross Section ◽  
Stability Problem ◽  
Local Stability ◽  
Economic Benefit ◽  
Simulation Analysis ◽  
Theoretical Research ◽  
Web Openings ◽  
The Web ◽  
Section Form

Castellated components have many advantages such as high bearing capacity, better bending stiffness, reasonable cross-section form and significant economic benefit. Castellated components are weakened by the reason of web openings, so it is more prone to appear local stability problem. Therefore, the researches of local stability in castellated components play a very important role in the application of the castellated components. In this issue, scholars at home and abroad do a lot of researches, including theoretical research, numerical simulation analysis and experimental research. But the research of castellated bending components are still in groping stage .That has seriously hampered the application and promotion of castellated components in China. So it is necessary to study the local stability of castellated components.

An Adaptive Domain Decomposition Scheme for Parallel Smooth Particle Hydrodynamics Regional Weather Model

1999 ◽  
Author(s):  
Gopal N. Kumar
Keyword(s):  
Domain Decomposition ◽  
Weather Forecasting ◽  
Fluid Flows ◽  
Particle Interactions ◽  
Smooth Particle Hydrodynamics ◽  
Sph Method ◽  
Decomposition Scheme ◽  
Weather Model ◽  
Model Complex ◽  
Particle Hydrodynamics

Abstract Smooth Particle Hydrodynamics (SPH) method is a lagrangian technique used to describe and model complex fluid flows. Being a lagrangian method, it is gridless and the particles themselves carry all the information relating to the flow. By nature of its formulation, SPH method can easily incorporate complex physics of particle interactions. This makes it an attractive candidate for modeling regional weather and weather forecasting. As the SPH method deals with particle interactions in a local sense, it is good for domain decomposition. This makes SPH ideal for parallel computations. The main bottleneck arises from the need to find neighboring particles to determine local interactions. Finding neighbors is achieved by sorting the particles based on some appropriate key value. In order to have high parallel efficiency, one would have to allocate the particles equally amongst the available processors for good load balancing. This calls for an adaptive domain reallocation and for a sorting methodology that is specifically tailored for this. This paper presents a new parallel sorting scheme that guarantees that the available processors have close to equal number of particles.

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