关于ADAMS/CAR整车建模问题

shepherd1221zy

最近在搞整车运动仿真问题，完成了一辆车前后悬架建模，以及K&C特性都完成了，没有问题，完成静平衡调节。组装好整车所需的所有子系统，没有任何连接错误的通讯器。但是却没法执行整车仿真，连整车静平衡都达不到？？求高手指点！！！

aerosun

这种最好把模型发生来，高手提交计算一下子就帮你看出问题来了。

yangguibing

我也要，我要建四轴的 哪位高手能指点啊

wangxinboy32

运算错误报一下  也好帮你分析一下原因

automan_always

高手啊，还要学习

小田螺

我要搞五连杆，悲剧了

xiaohuilang

wangxinboy32 发表于 2012-2-20 23:23
运算错误报一下  也好帮你分析一下原因

Reading in property files...
Reading of property files completed.
Setting up assembly for analysis of loadcase: 'parallel_travel'...
Writing analysis information to Adams/Solver command file: 'my_load_parallel_travel'.
Simulation(s) are beginning...





   *********************************************************************
   *                                                                   *
   *                      MSC.Software Corporation                     *
   *                                                                   *
   *                             A d a m s                             *
   *                                                                   *
   *          Automatic Dynamic Analysis of Mechanical Systems         *
   *                                                                   *
   *                      A d a m s / S o l v e r                      *
   *                                                                   *
   *      2012-03-08 13:34:59              Version MD R3               *
   *                                                                   *
   *      Customer Entitlement ID:         190635EF-8A3E7DED           *
   *                                                                   *
   *********************************************************************
  

   Enter ADAMS model file name or Carriage Return or ? (or STOP):

   

   No model input file (ADM file) is given.
  

   Enter Command:

   file/model=my_load_parallel_travel

   A new model supplied.  Initialization starts...
  
   The default input and analysis values will be restored.
  

   CPU time used = NaN seconds

   Enter ADAMS model file name or Carriage Return or ? (or STOP):

   Enter ADAMS output file name or ? (default is same as input):

     Adams model file .. my_load_parallel_travel.adm

  
   Default file names for output files
  
     Tabular output file:
     my_load_parallel_travel.out
  
     Diagnostic file    :
     my_load_parallel_travel.msg
  
     Message Database file    :
     my_load_parallel_travel.mdb
  
     Graphics file      :
     my_load_parallel_travel.gra
  
     Request file       :
     my_load_parallel_travel.req
  
     Results file       :
     my_load_parallel_travel.res
  

   Input Phase - Reading in Model
  

   ***********************************************************
   Adams/Solver dataset Title:
   Adams/Car Assembly (MD Adams R3)
   ***********************************************************

   Reading of model complete.
  

   Adams/Car MD Adams R3

Processing ENVIRONMENT entries in 'd:\MSC.Software\MD_Adams\R3\acar/acar.cfg'
Processing ENVIRONMENT entries in 'C:\Documents and Settings\Administrator/.acar.cfg'
   
   =================================================================
                              Adams/Tire
                          Version MD Adams R3
   =================================================================

   Input Phase - Populating Solver database
  

   Input Phase Complete.
  

   CPU time is 0.68750 seconds.
   
   acar_2008.1.0/ac_scc_init
   
       Reading ARRAY parameters using the
       ADAMS/Car array statement definitions.
   
   acar_2008.1.0/ac_scc_init
   
       Checking ARRAY parameters...

   Input and Input Check Phase complete.

   The system has 48 kinematic degrees of freedom.

   Enter Command:

   preferences/solver=F77

   Enter Command:

   control/ routine=acarSDM::con950, function=user(950,29,31,1,2,17,19,1,3,2,3,28,30,2,3,28,30,1,1)

   Entering the static equilibrium analysis phase...

   Displacement initial condition analysis...

  
   Jacobian Matrix Statistics for the Initial Conditions
   ======================================================
   Number of equations ............. = 384
   Number of non-zero entries ...... = 2302
   Percentage of matrix non-zero ... = 1.5611
   Total space used in MD array .... = 254648
  

   Symbolic refactorization attempted at time = 0.0.

   The system has 48 kinematic degrees of freedom.

---- ERROR ----
   Symbolic refactorization failed.  The matrix is structurally singular
   at time = 0.0.

   Symbolic refactorization attempted at time = 0.0.

   The system has 48 kinematic degrees of freedom.

---- ERROR ----
   Symbolic refactorization failed.  The matrix is structurally singular
   at time = 0.0.

---- WARNING ----
   On iteration 1, the Jacobian matrix for the initial values of
   the displacements (for the assembly analysis) is singular, a condition
   usually caused by over specification of EXACT coordinates.  Since
   Adams/Solver employs a penalty-function method to assemble the mechanism,
   the approach becomes less effective as more and more EXACT initial
   conditions are specified.  If the user labels too many initial values
   as EXACT, the Jacobian matrix can become ill-conditioned or even
   singular.  Although the analysis will continue, the simulation could
   fail or produce inaccurate results due to inconsistent initial conditions.

   Performing Static analysis...

   Generating the Jacobian matrix for the statics or quasi-statics problem.

  
   Jacobian Matrix Statistics for Statics
   ======================================================
   Number of equations ............. = 975
   Number of non-zero entries ...... = 8430
   Percentage of matrix non-zero ... = 0.88679
   Total space used in MD array .... = 408348
  

   Symbolic refactorization attempted at time = 0.0.

---- WARNING ----
   The symbolic refactorization failed.  The matrix is structurally singular
   at time = 0.0.

---- ERROR ----
   Static equilibrium analysis has not been successful.

   Restoring the input initial conditions...

---- ERROR ----
   Initial Static Sim. Not Successful

   Terminating Adams/Car usersubs...

  
      Adams/Solver execution terminated by subprogram ERRMES
  

   CPU time used = 1.4219 seconds
Analysis failed!
Please check the error messages to determine the cause.能帮我分析一下么

heng520

各位大哥，从proe导入adams/car 模板模式下的part，能否转换成general part啊

zzy0533

帮不上忙啊……

timberwolf86

wangxinboy32 发表于 2012-2-20 23:23
运算错误报一下  也好帮你分析一下原因

你好  可否帮忙看一下这是什么原因  老是仿真失败
Performing Static analysis...

   Generating the Jacobian matrix for the statics or quasi-statics problem.

  
   Jacobian Matrix Statistics for Statics
   ======================================================
   Number of equations ............. = 1634
   Number of non-zero entries ...... = 15401
   Percentage of matrix non-zero ... = 0.57683
   Total space used in MD array .... = 707612
  

   Symbolic refactorization attempted at time = 0.0.

---- ERROR ----
   Attempt = 1. No convergence after 25 iterations. Best iteration = 8.
   Trying next attempt with a different set of statics parameters...
  

   For the last attempted iteration the equation with the largest error
   was DIFF example_drift.testrig.sse_diff1  Error = 1659.2
  
   The variable receiving the largest increment
   was VARIABLE example_drift.testrig.vas_brake_demand.variable  Delta = 1.65920E+08

---- ERROR ----
   Static equilibrium analysis has not been successful.

   Restoring the input initial conditions...

---- ERROR ----
   Sim/stat cannot be achieved ...Stopping in <apre_ssssta>
   ID = 1020

   Terminating Adams/Car usersubs...