vl 灵敏度分析失败

js5861975 · 发表于 2013-4-12 13:46:36

vl noise&vibration灵敏度分析在最后计算nastran sensitivity solution时出现问题，请问知道灵敏度分析对模型有什么要求吗？mode frequency number设置的是1-10，提示说前四阶的特征值为负数（当设置成5-10后可以运算成功，但plot出不来），以下是f06文件：

* * * * * * * * * * * * * * * * * * * *
                                          * * * * * * * * * * * * * * * * * * * *
                                          * *                               * *
                                          * *          MSC.SOFTWARE       * *
                                          * *             CORP             * *
                                          * *                               * *
                                          * * M D N a s t r a n 2011 * *
                                          * *                               * *
                                          * *                               * *
                                          * *                               * *
                                          * *    Version 2011.1.0-CL104953 * *
                                          * *                               * *
                                          * *                               * *
                                          * *                               * *
                                          * *       APR 27, 2011          * *
                                          * *                               * *
                                          * *             Intel             * *
                                          * * MODEL P5-4/4950 (kmust117-2-PC) * *
                                          * *Windows 7 Ultimate 6.1 (Build 76 * *
                                          * *       Compiled for 8664       * *
                                          * *                               * *
                                          * * * * * * * * * * * * * * * * * * * *
                                          * * * * * * * * * * * * * * * * * * * *
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   SOL 200
   $
   $ DMAP FOR OUTPUT OF SENSITIVITY DATABLOCKS IN OUTPUT2
   $ VALID FOR  MSC - VERSION 2008
   $
   COMPILE IFPL, SOUIN=MSCSOU, NOLIST, NOREF
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1 EXPORTED BY LMS NASTRAN DRIVER                                           APRIL  12, 2013  MD NASTRAN 4/27/11 PAGE    4

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                                    M O D E L S U M M A R Y       BULK = 0
                                 ENTRY NAME       NUMBER OF ENTRIES
                                 ----------       -----------------
                                    CTETRA                128208
                                    DCONSTR                      11
                                    DESVAR                      4
                                    DRESP1                      11
                                    DSCREEN                      2
                                    DVMREL1                      4
                                    EIGRL                      1
                                       GRID                   36260
                                       MAT1                      2
                                    PARAM                      3
                                    PSOLID                      2
                                       RBE2                      24
^^^
^^^ >>> IFP OPERATIONS COMPLETE <<<
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1 EXPORTED BY LMS NASTRAN DRIVER                                           APRIL  12, 2013  MD NASTRAN 4/27/11 PAGE    6

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THERE ARE 128208 TETRA ELEMENTS. FIRST EID = 1085993 LAST EID = 1427445
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         ----- COMPARISON BETWEEN INPUT MATERIAL PROPERTY VALUES FROM ANALYSIS AND DESIGN MODELS -----
   ---------------------------------------------------------------------------------------------------------------
   MATERIAL MATERIAL MATERIAL    ANALYSIS       DESIGN       LOWER          UPPER    DIFFERENCE
      TYPE       ID       NAME       VALUE       VALUE          BOUND          BOUND       FLAG
   ---------------------------------------------------------------------------------------------------------------
   MAT1             1       E 2.100000E+05 2.100000E+05       N/A          N/A          NONE
   MAT1             1    RHO 7.800000E-09 7.800000E-09       N/A          N/A          NONE
   MAT1             2       E 7.100000E+04 7.100000E+04       N/A          N/A          NONE
   MAT1             2    RHO 2.800000E-09 2.800000E-09       N/A          N/A          NONE
   1. THE DIFFERENCE FLAG IS USED TO CHARACTERIZE DIfFERENCES BETWEEN ANALYSIS AND DESIGN MODEL PROPERTIES:
      IF THE FLAG IS NONE, THEN THERE IS NO SIGNIFICANT DIFFERENCE BETWEEN THE TWO VALUES.
      IF THE FLAG IS WARNING, THEN THE USER IS ADVISED THAT DIFFERENCES EXIST AND THE DESIGN MODEL
      IS BEING USED TO OVERRIDE THE ANALYSIS MODEL.
      IF THE FLAG IS FATAL, THEN THE DIFFERENCES ARE GREATER THAN  1.00000E+35 AND THE RUN WILL BE TERMINATED.
*** USER INFORMATION MESSAGE 4109 (OUTPX2)
   THE LABEL IS XXXXXXXX FOR FORTRAN UNIT 12
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*** USER INFORMATION MESSAGE 4114 (OUTPX2)
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*** USER INFORMATION MESSAGE 4114 (OUTPX2)
   DATA BLOCK MPTS    WRITTEN ON FORTRAN UNIT  12 IN BINARY (LTLEND) FORMAT USING NDDL DESCRIPTION FOR MPT, TRL =
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*** USER INFORMATION MESSAGE 4114 (OUTPX2)
   DATA BLOCK DYNAMICS WRITTEN ON FORTRAN UNIT  12 IN BINARY (LTLEND) FORMAT USING NDDL DESCRIPTION FOR DYNAMIC, TRL =
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*** USER INFORMATION MESSAGE 4114 (OUTPX2)
   DATA BLOCK DESTAB WRITTEN ON FORTRAN UNIT  12 IN BINARY (LTLEND) FORMAT USING NDDL DESCRIPTION FOR DESTA, TRL =
                  101                4                4                0                4                0                0
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      (MAXIMUM POSSIBLE FORTRAN RECORD SIZE =    16386 WORDS.)
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         (NUMBER OF FORTRAN RECORDS WRITTEN =       30 RECORDS.)
         (TOTAL DATA WRITTEN FOR DATA BLOCK =       75 WORDS.)
^^^ USER INFORMATION MESSAGE 9024 (FEA)
^^^ STIFFNESS, MASS, DAMPING, AND LOAD GENERATION INITIATED. DESIGN CYCLE NUMBER=1
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*** USER INFORMATION MESSAGE 7310 (VECPRN)
   ORIGIN OF SUPERELEMENT BASIC COORDINATE SYSTEM WILL BE USED AS REFERENCE LOCATION.
   RESULTANTS ABOUT ORIGIN OF SUPERELEMENT BASIC COORDINATE SYSTEM IN SUPERELEMENT BASIC SYSTEM COORDINATES.
0                                                 OLOAD RESULTANT
  SUBCASE/ LOAD
  DAREA ID TYPE    T1          T2          T3          R1          R2          R3
0       1    FX 0.000000E+00    ----       ----       ----    0.000000E+00  0.000000E+00
            FY    ----    0.000000E+00    ----    0.000000E+00    ----    0.000000E+00
            FZ    ----       ----    0.000000E+00  0.000000E+00  0.000000E+00    ----
            MX    ----       ----       ----    0.000000E+00    ----       ----
            MY    ----       ----       ----       ----    0.000000E+00    ----
            MZ    ----       ----       ----       ----       ----    0.000000E+00
         TOTALS  0.000000E+00  0.000000E+00  0.000000E+00  0.000000E+00  0.000000E+00  0.000000E+00
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*** USER INFORMATION MESSAGE 7310 (VECPRN)
   ORIGIN OF SUPERELEMENT BASIC COORDINATE SYSTEM WILL BE USED AS REFERENCE LOCATION.
   RESULTANTS ABOUT ORIGIN OF SUPERELEMENT BASIC COORDINATE SYSTEM IN SUPERELEMENT BASIC SYSTEM COORDINATES.
0                                                 OLOAD RESULTANT
  SUBCASE/ LOAD
  DAREA ID TYPE    T1          T2          T3          R1          R2          R3
0       1    FX 0.000000E+00    ----       ----       ----    0.000000E+00  0.000000E+00
            FY    ----    0.000000E+00    ----    0.000000E+00    ----    0.000000E+00
            FZ    ----       ----    0.000000E+00  0.000000E+00  0.000000E+00    ----
            MX    ----       ----       ----    0.000000E+00    ----       ----
            MY    ----       ----       ----       ----    0.000000E+00    ----
            MZ    ----       ----       ----       ----       ----    0.000000E+00
         TOTALS  0.000000E+00  0.000000E+00  0.000000E+00  0.000000E+00  0.000000E+00  0.000000E+00
^^^ USER INFORMATION MESSAGE 9051 (FEA)
^^^ NORMAL MODES ANALYSIS INITIATED FOR ANALYSIS = MODES AND DESIGN CYCLE NUMBER =  1
*** USER INFORMATION MESSAGE 5010 (LNCILD)
   STURM SEQUENCE DATA FOR EIGENVALUE EXTRACTION.
   TRIAL EIGENVALUE = 2.403474D+05, CYCLES = 7.802609D+01 THE STURM COUNT = 6
*** USER INFORMATION MESSAGE 5010 (LNCILD)
   STURM SEQUENCE DATA FOR EIGENVALUE EXTRACTION.
   TRIAL EIGENVALUE = 6.015872D+07, CYCLES = 1.234438D+03 THE STURM COUNT = 10
TABLE OF SHIFTS:  (LNNRIGL)
SHIFT #       SHIFT VALUE       FREQUENCY, CYCLES    # EIGENVALUES BELOW # NEW EIGENVALUES FOUND
   1.       2.4034741E+05       7.8026085E+01                6                      13
   2.       6.0158724E+07       1.2344385E+03             10                      0
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0                                                                                                          SUBCASE=1
0

                        E I G E N V A L U E  A N A L Y S I S S U M M A R Y (READ MODULE)

                                 BLOCK SIZE USED ...................... 7
                                 NUMBER OF DECOMPOSITIONS ............. 2
                                 NUMBER OF ROOTS FOUND ................ 10
                                 NUMBER OF SOLVES REQUIRED ............ 8
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                                          R E A L E I G E N V A L U E S
MODE EXTRACTION    EIGENVALUE          RADIANS          CYCLES          GENERALIZED       GENERALIZED
NO.    ORDER                                                                      MASS             STIFFNESS
      1       1    -4.671756E-05       6.835024E-03       1.087828E-03       1.000000E+00    -4.671756E-05
      2       2    -3.178697E-05       5.637994E-03       8.973145E-04       1.000000E+00    -3.178697E-05
      3       3    -1.569311E-05       3.961452E-03       6.304847E-04       1.000000E+00    -1.569311E-05
      4       4    -6.417016E-06       2.533183E-03       4.031686E-04       1.000000E+00    -6.417016E-06
      5       5       2.065464E-05       4.544738E-03       7.233174E-04       1.000000E+00       2.065464E-05
      6       6       4.009574E-05       6.332119E-03       1.007788E-03       1.000000E+00       4.009574E-05
      7       7       1.463754E+07       3.825904E+03       6.089115E+02       1.000000E+00       1.463754E+07
      8       8       1.465201E+07       3.827795E+03       6.092125E+02       1.000000E+00       1.465201E+07
      9       9       3.229983E+07       5.683294E+03       9.045243E+02       1.000000E+00       3.229983E+07
   10       10       5.998016E+07       7.744686E+03       1.232605E+03       1.000000E+00       5.998016E+07
^^^ USER INFORMATION MESSAGE 9051 (FEA)
^^^ NORMAL MODES ANALYSIS -    DATA RECOVERY INITIATED FOR ANALYSIS=  MODES AND  DESIGN CYCLE NUMBER=  1
*** USER INFORMATION MESSAGE 4114 (OUTPX2)
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*** USER INFORMATION MESSAGE 4114 (OUTPX2)
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^^^ USER INFORMATION MESSAGE 9052 (FEA)
^^^ NORMAL MODES ANALYSIS COMPLETED FOR ANALYSIS=  MODES AND DESIGN CYCLE NUMBER= 1
*** USER FATAL MESSAGE 7560 (DSAD11)
   MODE 1, WHICH IS SPECIFIED ON A DRESP1 ENTRY, HAS AN EIGENVALUE OF -4.671756E-05 WHICH IS LESS THAN (OR EQUAL TO) 0.0.
   USER INFORMATION:  THIS MODE COULD BE A RIGID BODY MODE.
   USER ACTION:  REVIEW LIST OF REAL EIGENVALUES AND SELECT ONLY ELASTIC MODE NUMBER FOR ATTA FIELD (FIELD 7) ON DRESP1.
*** USER FATAL MESSAGE 7560 (DSAD11)
   MODE 2, WHICH IS SPECIFIED ON A DRESP1 ENTRY, HAS AN EIGENVALUE OF -3.178697E-05 WHICH IS LESS THAN (OR EQUAL TO) 0.0.
   USER INFORMATION:  THIS MODE COULD BE A RIGID BODY MODE.
   USER ACTION:  REVIEW LIST OF REAL EIGENVALUES AND SELECT ONLY ELASTIC MODE NUMBER FOR ATTA FIELD (FIELD 7) ON DRESP1.
*** USER FATAL MESSAGE 7560 (DSAD11)
   MODE 3, WHICH IS SPECIFIED ON A DRESP1 ENTRY, HAS AN EIGENVALUE OF -1.569311E-05 WHICH IS LESS THAN (OR EQUAL TO) 0.0.
   USER INFORMATION:  THIS MODE COULD BE A RIGID BODY MODE.
   USER ACTION:  REVIEW LIST OF REAL EIGENVALUES AND SELECT ONLY ELASTIC MODE NUMBER FOR ATTA FIELD (FIELD 7) ON DRESP1.
*** USER FATAL MESSAGE 7560 (DSAD11)
   MODE 4, WHICH IS SPECIFIED ON A DRESP1 ENTRY, HAS AN EIGENVALUE OF -6.417016E-06 WHICH IS LESS THAN (OR EQUAL TO) 0.0.
   USER INFORMATION:  THIS MODE COULD BE A RIGID BODY MODE.
   USER ACTION:  REVIEW LIST OF REAL EIGENVALUES AND SELECT ONLY ELASTIC MODE NUMBER FOR ATTA FIELD (FIELD 7) ON DRESP1.
0FATAL ERROR
1                                     * * * END OF JOB * * *

No Symbolic Replacement variables or values were specified.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
   GINO FILE    101 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
   GINO FILE    102 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
   GINO FILE    244 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
   GINO FILE    243 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
   GINO FILE    201 WAS LEFT OPEN AT PROGRAM TERMINATION.

lengxuef · 发表于 2013-4-12 14:01:05

Model打包上传。

js5861975 · 发表于 2013-4-12 14:19:46

lengxuef 发表于 2013-4-12 14:01
Model打包上传。

哎呀，这个模型是保密的玩意，上头不让上传呢。我之前已经做过vl里help的例子没问题。不过我这个模型里加了螺栓连接，这个对灵敏度分析有关系吗？

js5861975 · 发表于 2013-4-12 15:33:19

lengxuef 发表于 2013-4-12 14:01
Model打包上传。

我自己做了个简单的模型，还是出现这样的错误啊。我把modal放到附件里了，请多多指教。好像今天论坛上传东西特别慢，我放到了百度网盘：http://pan.baidu.com/share/link?shareid=399714&uk=169398113

lengxuef · 发表于 2013-4-13 00:14:56

js5861975 发表于 2013-4-12 15:33
我自己做了个简单的模型，还是出现这样的错误啊。我把modal放到附件里了，请多多指教。好像今天论坛上传 ...

模型不全，要把VL模型的同名文件夹一起上传。

js5861975 · 发表于 2013-4-13 09:49:47

lengxuef 发表于 2013-4-13 00:14
模型不全，要把VL模型的同名文件夹一起上传。

不好意思啊，有点粗心，我把文件又放到了网盘http://pan.baidu.com/share/link?shareid=400753&uk=169398113

js5861975 · 发表于 2013-4-13 18:23:43

js5861975 发表于 2013-4-13 09:49
不好意思啊，有点粗心，我把文件又放到了网盘http://pan.baidu.com/share/link?shareid=400753&uk=169398 ...

help里的例子中mode frequency 是7-11，但是取1-11就会出错，请问这个是怎么回事啊

lengxuef · 发表于 2013-4-13 21:11:15

js5861975 发表于 2013-4-13 18:23
help里的例子中mode frequency 是7-11，但是取1-11就会出错，请问这个是怎么回事啊 ...

前六阶是刚体模态，灵敏度肯定是0的，计算没意义啊。

lengxuef · 发表于 2013-4-14 21:36:53

最近比较忙，非常抱歉。
我看了一下例子，只要做7-10阶模态的灵敏度分析就行了。

例子文件：
http://pan.baidu.com/share/link?shareid=495959&uk=1728334102

js5861975 · 发表于 2013-4-15 09:33:16

lengxuef 发表于 2013-4-13 21:11
前六阶是刚体模态，灵敏度肯定是0的，计算没意义啊。

哦，原来如此，功力深厚啊，请问这方面有没推荐的文章或者书籍啊？

js5861975 · 发表于 2013-4-15 10:06:39

lengxuef 发表于 2013-4-14 21:36
最近比较忙，非常抱歉。
我看了一下例子，只要做7-10阶模态的灵敏度分析就行了。

真是太感谢了在百忙之中还帮我解了疑惑！看到你改后的了，用你改的我可以看到matrix plot，但是换到我自己的原文件（就是发给你的例子）将模态设置成7-10后发现matrix plot出不来图啊。请问这个怎么回事啊？

lengxuef · 发表于 2013-4-15 12:41:35

js5861975 发表于 2013-4-15 09:33
哦，原来如此，功力深厚啊，请问这方面有没推荐的文章或者书籍啊？

Nastran有本手册是介绍灵敏度分析的。

js5861975 · 发表于 2013-4-15 13:15:04

lengxuef 发表于 2013-4-15 12:41
Nastran有本手册是介绍灵敏度分析的。

好的，太感谢了

phillipsesco · 发表于 2014-7-18 10:49:00

js5861975 发表于 2013-4-12 14:19
哎呀，这个模型是保密的玩意，上头不让上传呢。我之前已经做过vl里help的例子没问题。不过我这个模型里加 ...

你好，你的vl装的是哪个版本？我做灵敏度分析时报错：cannot getting user server...请问是什么原因？为什么计算模态可以，到计算灵敏时不能得到sensitivity.op2文件？

lengxuef · 发表于 2014-7-19 19:58:54

phillipsesco 发表于 2014-7-18 10:49
你好，你的vl装的是哪个版本？我做灵敏度分析时报错：cannot getting user server...请问是什么原因？为 ...

没跟Nastran连接好吧。

foergang · 发表于 2016-10-8 18:40:02

phillipsesco 发表于 2014-7-18 10:49
你好，你的vl装的是哪个版本？我做灵敏度分析时报错：cannot getting user server...请问是什么原因？为 ...

我的也是这个问题，请问最后问题解决了吗？

xiaoting123 · 发表于 2016-10-25 17:07:02

没跟Nastran连接好

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[NVM&Correlation] vl 灵敏度分析失败

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