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发表于 2004-10-28 16:08:41
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来自 北京
Re:flac介绍(供新手)
FLAC3D 3.0 pre-release has the following new features:
All calculations and data are double precision floating point numbers.
FLAC3D v3.0 runs approximately 10-15% faster than v2.10.
Hysteretic Damping
A new damping facility for dynamic calculations, hysteretic damping, is now available in FLAC3D 3.0. This form of damping allows strain-dependent modulus and damping functions to be incorporated directly into the FLAC3D simulation. This makes it possible for direct comparisons between calculations made with the equivalent-linear method and a fully nonlinear model, without any compromises in the choice of constitutive model.
In addition, the need to introduce additional damping, such as Rayleigh damping, is greatly reduced, and consequently the solution time is substantially reduced, by using hysteretic damping.
See the "Examples" section below for support documentation.
Hoek-Brown Constitutive Model
The Hoek-Brown failure criterion is implemented as a built-in constitutive model in FLAC3D 3.0. The failure surface is nonlinear and is based on the relation between the major and minor principal stresses. The model incorporates a plasticity flow rule that varies as a function of the confining stress level. Documentation/examples for this feature are forthcoming.
Thermal/Fluid Advection Model
FLAC3D already performs transient simulations of a nonlinear solid coupled to porous-media fluid flow and of heat conduction in a solid, coupled mechanically to the solid and fluid. This new development adds temperature-dependent fluid density and thermal advection in the fluid. Documentation/examples for this feature are forthcoming.
Ability to read 3DShop-KUBRIX generated grids
3DShop-KUBRIX is a powerful solids modeling and hexahedral grid generation package that will be available soon through Itasca. FLAC3D gridding primitives are still available, however 3DShop greatly simplifies the construction of complex geometries. Grids created by 3Dshop can be directly read into FLAC3D 3.0. 3DShop is currently in beta testing and does not have a set release date. If you would like information regarding this optional addition for FLAC3D, please contact Reza Taghavi.
Movie command
FLAC3D can now produce AVI and DCX movies. Documentation/examples for this feature are forthcoming.
Particle tracking
Particles can now be released into a flow field and their paths can be recorded and plotted. Documentation/examples for this feature are forthcoming.
In addition, FLAC3D 3.0 will contain the following new features:
[These are not yet available in the pre-release version]
Network key license version
Hydration model for simulation of curing of concrete |
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