登 录
註 冊
论坛
微波仿真网
注册
登录论坛可查看更多信息
微波仿真论坛
>
Altair FEKO 专区
>
FEKO交流版
>
在计算的过程中有如下提示
发帖
回复
2804
阅读
2
回复
[
已解决
]
在计算的过程中有如下提示
离线
ham119804
UID :11714
注册:
2008-04-29
登录:
2010-03-03
发帖:
339
等级:
积极交流四级
0楼
发表于: 2009-07-11 12:16:38
关键词:
设置
错误
1. The following message from the master process (MYID= 0):
(C60HbL
WARNING 33193: Negative vertex coordinates found in the geometry, STL export will not be conformal to the standard, one might consider moving the geometry to make all coordinates positive
u ioBId
See also message in the output file A1_MLFMM.out
PNG!q}(c
Checking the geometrical input data
G !;<#|a
qcR"i+b
2. The following message from the master process (MYID= 0):
G;yh$n<"
WARNING 1663: Inhomogeneous segmentation for triangles
y)D7!s
See also message in the output file A1_MLFMM.out
B,avI&7M;S
Checking the geometrical input data for triangles
!F[^?:pK
2P ic 4Z
+lED6]+%
3. The following message from the master process (MYID= 0):
/><+[\q4LM
NOTE 33242: For the FMM there is the possibility to save memory by switching to single precision (see EG card), this is normally recommended
';Ew-u
See also message in the output file A1_MLFMM.out
IHStN,QD
第一个问题 我认为是有警告是有负向的面元 但是我差了半天也没有(并不排除我出错误的原因)
x$;kA}gy
第二个问题 是不是因为 ..
Hl b%/&
\%$z!]S>
未注册仅能浏览
部分内容
,查看
全部内容及附件
请先
登录
或
注册
共
条评分
离线
webhugo
UID :8223
注册:
2008-02-10
登录:
2025-06-22
发帖:
1648
等级:
七级仿真大师
1楼
发表于: 2009-07-12 14:47:12
多看一下 PDF 手冊跟範例對你會有幫助....
P|tNmv[;
me+u"G9I;
第一個問題 我認爲是有警告是有負向的面元 但是我差了半天也沒有(并不排除我出錯誤的原因)
0 H0U%x8
--> 方向性... file A1_MLFMM.out...裡會告訴您是那個面。
\f-@L;8#
m8,jV R
第二個問題 是不是因爲最大的邊與最小邊的比值超過100所以顯示Inhomogeneous segmentation
`P/87=h
沒架構,思考方向有2:
qp{3I("_
1. inhomogeneous dielectric bodies
#\l#f8(l
2.inhomogeneous meshing
j^)=<+Q;=
從字面看來應該是2
nJ2910"<
WARNING 1663: Inhomogeneous segmentation for triangles .See also message in the output file A1_MLFMM.out
S[5OTwa8L
Examples of BQ card usage:
]MmFtdvE
The BQ card can be used to create the mesh shown in Figure 13-6, or also for inhomogeneous
E@J}(76VS
meshing as shown in Figure 13-7.
Ov~vK\
Figure 13-6: Example of a BQ card from demo BQ1.pre
oH"VrS 6
Figure 13-7: Example of a BQ card with an inhomogeneous segmentation from demo BQ3.pre
W!R7D%nX
July 2008 FEKO User’s Manual - DESCRIPTION OF THE GEOMETRY CARDS 13-9
,:6.Gi)|
k!0vpps
第三個問題 用fMM會節省内存 這個怎麽設置呢?
^OrO&w|
NOTE 33242: For the FMM there is the possibility to save memory by switching to single precision (see EG card), this is normally recommended
m}32ovpw
1. single precision (see EG card)
-,qGEJ
Solution accuracy: This parameter can be set to force FEKO to use single precision for the storage of some of the memory critical arrays. Single precision storage is the default behaviour, and as compared to double precision the memory requirement is then half. Using double precision is recommended when the FEKO kernel gives a warning to switch to double precision (this might happen for instance at low frequencies where an increased accuracy is required).
<El!,UBq<
2. MLFMM
8'-E>+L
21 Using the MLFMM for electrically large models
A)80qx:
Keywords: MLFMM, large model, Radar cross section, trihedral
U7xKu75G1
In this example we consider a single plane wave incident (from ϑ=60◦ and ϕ=0◦) on a
9WT{~PGj
large trihedral. The size of the trihedral (13.5λ2 surface area) was chosen such that it
f7?u`"C
can still be solved incore on a PC using 519 MByte of RAM. Larger examples show a
W_bA.zT{
proportionally larger resource saving by using the MLFMM, but the absolute increase in
&~ '^;hy=
solution time makes such an example impractical for explanation purposes. This example
Aj{G=AT
is large enough to demonstrate the advantage of using the MLFMM.
R q .2
22 Antenna coupling on an electrically large object
q"-+`;^7(-
Keywords: electrically large, MLFMM, CFIE, coupling, antenna placement,
RHu4cK!5
S-parameters
d04fj/B
A Rooivalk helicopter mock-up model with 3 monopole antennas located near the front,
`1i\8s&O6@
middle and back of the model respectively. S-parameters (coupling) are computed between
sp7#e%R\
the 3 antennas over a frequency range.
共
条评分
离线
ham119804
UID :11714
注册:
2008-04-29
登录:
2010-03-03
发帖:
339
等级:
积极交流四级
2楼
发表于: 2009-07-12 16:13:33
回 1楼(webhugo) 的帖子
FMM是他自己MLFMM自己改成的一种算法吧 而且用单精度会节省一半内存 那个反向面元还是不大好找 能不能再看看
共
条评分
发帖
回复