COMPUTER SIMULATIONS - FINITE ELEMENT PROGRAM

COMPUTER SIMULATIONS - FINITE ELEMENT PROGRAM Line 2 Basic control variables... 

The most efficient method is to have the supplier use finite element analysis (FEA) to do a simulation. One can use trial and error approaches, but since the process involves cutting metal on a mold, it is faster and less expensive to use a computer simulation. The FEA program chosen must be capable of nonlinear calculations in order to properly model the nonlinear material properties. 

For complex offshore structures or where foundations may be critical, finite-element analysis computer programs with dynamic simulation capability erm be used to evaluate foundation natural frequency and the forced vibration response. 

This paper will discuss the formulation of the simulator for the filament winding process which describes the temperature and extent of cure in a cross-section of a composite part. The model consists of two parts the kinetic model to predict the curing kinetics of the polymeric system and the heat transfer model which incorporates the kinetic model. A Galerkin finite element code was written to solve the specially and time dependent system. The program was implemented on a microcomputer to minimize computer costs. 

The advantages of this type of system are obvious the pore space is of sufficient complexity to represent any natural or technical pore network. As the model objects are based on computer generated clusters, the pore spaces are well defined so that point-by-point data sets describing the pore space are available. Because these data sets are known, they can be fed directly into finite element or finite volume computational fluid dynamics (CFD) programs in order to simulate transport properties [7]. The percolation model objects are taken as a transport paradigm for any pore network of major complexity. 

For the coarse estimation of extruder size and screw speed, simple mass and energy balances based on a fixed output rate can be used. For the more detailed design of a twin-screw extruder configuration it is necessary to combine implicit experience knowledge with simulation techniques. Theses simulation techniques cover a broad range from specialized programs based on very simple models up to detailed Computational Fluid Dynamics (CFD) driven by Finite Element Analysis (FEA) or Boundary Element Method (BEM). 

An evaluation of the effect of thermal loading of optical elements is achieved by using finite element analysis computer simulation. Such a computer program calculates what happens over a given number of time steps when a certain heat load is applied to the surface of an optical element such as a mirror. It takes into account the heat conductivity in the mirror bulk and the emissivity of the reflecting and other mirror surfaces. Once the system has reached the calculated equilibrium the thermal expansion is calculated. 

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