Abaqus Ur Subroutines Reference Manual
我们和地球英文翻译1.2.2 VDLOAD
1.2.2 VDLOAD
Ur subroutine to specify nonuniform distributed loads.
Product: Abaqus/Explicit
References
∙ “Applying loads: overview,” Section 33.4.1 of the Abaqus Analysis Ur's Manual
∙ “Distributed loads,” Section 33.4.3 of the Abaqus Analysis Ur's Manual
∙ *DLOAD
∙ *DSLOAD
∙ “Deformation of a sandwich plate under CONWEP blast loading,” Section 9.1.8 of the A
baqus Example Problems Manual
Overview
没关系用英语怎么说Ur subroutine VDLOAD:
∙ can be ud to define the variation of the distributed load magnitude as a function of position, time, velocity, etc. for a group of points, each of which appears in an element-bad or surface-bad nonuniform load definition;
∙ will be called for load integration points associated with each nonuniform load definition including PENU and PINU loads applicable for pipe elements;
∙ crescendodoes not make available the current value of the nonuniform distributed loads for file output purpos; and
∙ recognizes an amplitude reference (“Amplitude curves,” Section 33.1.2 of the Abaqus Analysis Ur's Manual) if it appears with the associated nonuniform load definition.
Ur subroutine interface
subroutine vdload (
C Read only (unmodifiable)variables -
a m
1 nblock, ndim, stepTime, totalTime,
2 amplitude, curCoords, velocity, dirCos, jltyp, sname,
C Write only (modifiable) variable -
1 value )
C
include 'vaba_param.inc'
C
dimension curCoords(nblock,ndim), velocity(nblock,ndim),
1 dirCos(nblock,ndim,ndim), value(nblock)
character*80 sname
C
do 100 km = 1, nblock
ur coding to define value
100 continue
return
end
zichen
Variable to be defined
value (nblock)
Magnitude of the distributed load. Units are FL–2 for surface loads, FL–3 for body forces.
Variables pasd in for information
nblock
Number of points to be procesd in this call to VDLOAD.
ndim
Number of coordinate directions: 2 for two-dimensional models, 3 for three-dimensional models. The model will be considered three-dimensional if any three-dimensional elements are defined (including SPRINGA elements).
stepTime
Value of time since the step began.
totalTime
Value of total time. The time at the beginning of the step is given by totalTime – stepTime.
amplitude
Current value of the amplitude referenced for this load (t to unity if no amplitude is referenced). You must multiply the load by the current amplitude value within the ur subroutine if the amplitude is required.
curCoords (nblock, ndim)
Current coordinates of each point for which the load is to be calculated.
velocity (nblock, ndim)
Current velocity of each point for which the load is to be calculated.
dirCos (nblock, ndim, ndim)
Current orientation of the face, edge, pipe, or beam for pressure type loads (not applicable for body force type loads). The cond dimension indicates the vector, and the third dimension indicates the components of that vector. For faces (pressures on three-dimensional continuum, shell, and membrane elements), the first and cond vectors are the local directions in the plane of the surface and the third vector is the normal to the face, as defined in “Conventions,” Section 1.2.2 of the Abaqus Analysis Ur's Manual. For solid elements the normal points inward, which is the opposite of what is defined in the conventions; for shell elements the normal definition is consistent with the defined conventions. For edges (pressures on two-dimensional continuum elements and two-dimensional beams and pipes), the first vector is the normal to the edge, the cond vector is the tangent to the edge, and, if ndim=3, the third vector will be a unit normal in the out-of-plane direction. For three-dimensional beam and pipe elements, the first and cond vectors are the local axes (, ) and the third vector is the tangent vector (), as defined in “Beam element cross-ction orientation,” Section 29.3.4 of the Abaqus Analysis Ur's Manual.
jltyp
Key that identifies the distributed load type. The load type may be a body force, a surface-bad load, or an element-bad surface load. For element-bad surface loads, this variable identifies the element face for which this call to VDLOAD is being made. See Part VI, “Elements,” of the Abaqus Analysis Ur's Manual for element load type identification. This information is uful when veral different nonuniform distributed loads are being impod on an element at the same time. The key is as follows:
Jltype | Load type |
0 | Surface-bad load |
1 | BXNU |
2 | BYNU |
3 | BZNU |
20 | PNU |
21 | P1NU |
22 | P2NU |
23 | P3NU | spanner
24 | P4NU |
25 | P5NU |
26 | P6NU disable是什么意思 |
27 | PINU |
28 | PENU |
41 | PXNU |
linkshare42社会公德的基本特征 | PYNU |
43 | 哈他瑜伽培训PZNU |
| |
sname
Surface name for a surface-bad load definition (JLTYP=0). For a body force or an element-bad load the surface name is pasd in as a blank.
