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Finite element simulation method of random vibration analysis was used for hermetically metal sealing.
According to the using conditions, the hermetically metal sealing ran the random vibration simulation analysis in ANSYS after inputting PSD spectra (Fig. 3).
In order to verify the random vibration damage mechanism, random vibration test of hybrid the hermetically metal sealing was performed, with the same random vibration test conditions and simulation conditions.
The cumulative fatigue damage (CFD) is then written as CFD=i=1nΔDi (2) In random vibration fatigue failure analysis, it is assumed that CFD = 1 when failure occurs.
Simulation of random fatigue life.

Numerical simulation of the flow field in safety valve Xiaobin Ji1,a Xueyi Qi1,b Xiaoyan Li2,c Wanbin Jin3,d 1 Lanzhou University of Technology, Lanzhou Gansu China 730050 2 Chang’ an University, Xi’an Shanxi China 710064 3 Lanzhou Rede Mill Company, Lanzhou Gansu China 730000 ajixb.92018@yahoo.com.cn,bqixy@lut.cn,clxy2902050206@yahoo.cn,djinwanbin@163.com Keywords: safety valve; numerical simulation; stress turbulence model; flow field analysis; cavitation and flow noise Abstract: By using the Reynolds stress turbulence model at big Reynolds number condition and computational fluid dynamics, the data simulating calculation was carried out to the safety valve inner flow field with different opening size and different valve structural parameters.
FLUENT software was used in simulation calculation and analysis.
These two vortexes are the sources of cavitation, cavitation erosion and fluid noise; (2) The strength of the fluid noise is related with the intensity and size of vortex; the larger the valve opening size is, the stronger the vortex is, and the higher the flow noise is; (3) In the condition of the same valve opening, the larger the dead space at the bottom of valve cavity is, the stronger the vortex formed is, and the higher the flow noise is; so by reducing the dead space volume between lower cavity and seat as well as this among the regulating ring, the formation of vortex and flow noise in this space will be decrease or eliminated; (4) The shape of the disc has certain effect on improving velocity path line; (5) In the design and optimization of the safety valve structure, it offers a kind of effective design tools with simulating dynamic characteristics of the safety valve by using the computational fluid dynamics (CFD), a numerical simulation method.
[3] Feng jin, Zhang manlai, Huang tiancheng Study on Hydrodynamic Characteristics of Safety Valve Based on CFD Calculation Nuclear Power Engineering, 2007(5), 31-35
Simulation of the Dynamics of Spring-Loaded Safety Valve[R]，87-PVP-6.New York：ASME，1987.

In this study a 3D computational fluid dynamics (CFD) analysis was carried out to determine the minimum inlet propellant temperature with change in mass flow rate of the propellant so as to maintain single phase flow in the micronozzle.
Validation of the CFD Code The validation of steam flow in micronozzle is done by comparing the experimental results in literature [6] and solving the model using CFD code.
Comparison of the values shows good agreement of the thrust value obtained by numerical simulations and experiments.
Conclusions In this research the performance analysis of a micronozzle steam flow is done by numerical simulation.
Kana, et al., Simulation and experiment research on vapourizing liquid micro-thruster, Sensors and Actuators A 157 (2010) 140–149

A three-dimensional model of a full-sized diesel SNCR system generated by CFD software FIRE is used to investigate the reduction efficiency under different temperatures.
Therefore this numerical simulation with CFD software (FIRE 2009) is introduced to investigate the performance of SNCR system.
And the simulation injection point agrees with position A.
The simulation results are slightly lower than the experimental results, because simulation lacks a reaction process before mixture flows across the sncr-inlet cross section.
The simulation results are in good agreement with the experimental results, and simulation method can be used to further optimize SNCR system.

Quasi-steady Marching-on in Time Approximation Technique of Numerical Simulation of Wind Pressures on Building Zhixiang Yu1a, Yanjun Yan2b , Hao Wu1c 1 School of Civil Engineering Southwest Jiaotong University ,Chengdu, China 2 College of Civil Engineering Tongji University ,Shanghai, China ayzxzrq@126.com, byyj07011100@yahoo.com.cn, c Yong_zhiwu @163.com Keywords: Wind load,Quasi-steady Approximation, CFD, Murakami model, Numerical simulation Abstract.
Introduction Since the 1990s, CFD has been employed to analyze the wind pressure of buildings by many scholars such as Murakami [1-2], Selvam [3-4], Holmes [5].
Hibi, Three-dimensional numerical simulation of air flow around a cubic model by means of large eddy simulation, J.
Panneer Selvam,Computation of pressures on Texas Tech University building using large eddy simulation, J.
Computational fluid dynamics analysis: CFD Software Principles and Applications [M].

A comparison on the combustion process and characteristic of conventional HBS and HTAC HBS is performed by application of Computational Fluid Dynamics (CFD) simulation model.
CFD Study of HTAC HBS In order to study the combustion features of HATC stove, the physical models of normal dome combustion stove and HTAC stove, as well as mathematic model of turbulent combustion are established.
The temperature distribution, concentration distribution and formation amount of NOx are studied by CFD simulation method.
The combustion characteristics of HTAC stove is studied by simulations of convention dome combustion stove and HTAC stove respectively.
Numerical simulation on influence factors of NOx emissions for pulverized coal boiler.

By Computational Fluid Dynamics (shortened as CFD) method, the high relative speed motion model between the blade and air flow is established, the flow field through the blade tip section are simulated, and the instantaneous movement of air flow around the blade can be known.
Yu studied a single-deck mower, and designed the cutter suspension system, analyzed the cutter movement by Matlab software simulation [8].
The cutter deck and the blade are firstly designed, and then stimulated by Computational Fluid Dynamics (shortened as CFD) software called Fluent.
The same can be seen in the simulation, the vortex phenomenon occur close to the blade wall, and there is sudden drop trend for air flow rate, the grass clippings will pile up on the surface of the blade.
Modern computer simulation technology provides an opportunity for the study on commercial lawn mowing vehicle, at least they can provide reliable advice and methods for the production design and manufacturing.

CFD simulation on Laika also shows that the use of orini and powire can reduce the indoor air temperature.
Computer simulation using CFD indicated that orini can cool the entire building and the indoor temperature achieved is lower when compared to conventional wall.
In order to obtain validation data on thermal comfort with regard to the use orini and powire on Laika, simulation using Computational Fluid Dynamics (CFD) of DesignBuilder was carried out to obtain data on temperature and wind flow.
The simulation results shows that with outdoor air temperature 27°C, the system of orini and powire can reduce the indoor air temperature by 2.09°C (27°C outdoor, 24.91°C indoor).
Simulation results for temperature and wind flow in Laika (Source: author) Actually orini and powire are an integrated system with the overall shape and material of Laika.

High-Quality SiC Bulk Single Crystal Growth based on Simulation and Experiment S.
Electromagnetic and thermal fields were analyzed by the commercial software, Flux-Expert [13,14], and CFD-ACE+[15].
These effects were confirmed by both numerical simulation and experiments.
The author, S.N, thanks Dr.Michel.Pons at INPG for his help on numerical simulation.
[15] CFD-ACE+, CFDRC, AL, USA

External Extreme Impacts on NPP Constructions – Methodology of Computational simulation Alexandr M.
Petryashev1,h 1 Department of Computer Science and Applied Mathematics, Research-Educational Center of Computational Simulation, Moscow State University of Civil Engineering (MGSU), 26, Yaroslavskoe Shosse, 129337, Moscow, RUSSIA a, b, c, d, e, f, g. hniccm@mgsu.ru Keywords: Numerical simulation, external extreme loads and impacts, nuclear power plants (NPP), wind hurricane, tornado, plane crash, the impact of the shock wave, seismic loads, tsunami, ANSYS Mechanical, ANSYS CFD, ANSYS AUTODYN, ABAQUS Standard\Explicit, LS-DYNA Abstract.
The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and correct methods and software application packages for numerical simulation of external loads and impacts on the basic structures of nuclear power plants (wind hurricane, tornado, plane crash, the impact of the shock wave, seismic and tsunami effect).
─ ANSYS CFD - the numerical simulation of three-dimensional steady and unsteady fluid dynamics problems of high computational dimension
─ ANSYS AUTODYN and LS-DYNA – simulation of the non-linear high-speed processes, including non-linear dynamic analysis on the explicit integration scheme, which allows to analyze the physical processes: the impact and penetration, explosions, destruction, aerohydroelasticity - with an extensive library of models and materials properties.