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发表于 2014-7-21 22:48:53
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来自 浙江杭州
section_solid中的AET主要用来定义进、出边界条件的,AET一般取4或0,4的话用来定义inflow(流动源),0的话用来定义outflow。
DCT在r5以后不用了,默认为1(advection logic),或者为-1(new advection logic),非-1情况下都一样。
具体这些你要去查查手册或看看有关教程了。
In addition to setting ELFORM to 11, setting AET to 4 in *SECTION_SOLID invokes a reservoir (or
ambient) type element option in the ALE formulation. The user may dictate pressure to such
elements by prescribing the thermodynamic condition of the element, either as unvarying with
time by simply defining E0 and V0 in the *EOS (equation-of-state) input or as a function of time
via *BOUNDARY_AMBIENT_EOS. Thus, to model a prescribed inflow or prescribed outflow of
material, one or two layers of ALE elements on the exterior of the mesh at the inflow (outflow)
region is assigned a unique PART ID so that AET may be set to 4 for that layer. If the inflow or
outflow conditions include a known flow velocity into or out of the ALE mesh, that velocity is
prescribed by applying *BOUNDARY_PRESCRIBED_MOTION_NODE to the exterior nodes at the
inflow/outflow region.
To model unprescribed (unknown) outflow, AET may be left as 0 (default) in which case outflow
is calculated by LS-DYNA.
Do not attempt to assign values other than 0 or 4 to the parameter AET. |
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