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汽车车轮过约束了,怎么办啊?

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发表于 10-7-2011 10:38:30 | 显示全部楼层 |阅读模式

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模型检测结果如下:有两个过约束,仿真运行不了啊!请高手指点 一下啊!
447 Degrees of Freedom for .my_tractor_1
There are 2 redundant constraint equations.
   This constraint:                                                                         unnecessarily removes this DOF:
   .my_tractor_1.msc_truck_drive_wheels.jolper_sse_jprim  (Perpendicular Primitive_Joint)   Rotation Between Zi & Zj
   .my_tractor_1.msc_truck_drive_wheels.jorper_sse_jprim  (Perpendicular Primitive_Joint)   Rotation Between Zi & Zj

Model verified successfully










仿真出现如下错误:

   Performing Static analysis...
   The following equations impose the redundant constraints:
                    265   PERPI JPRIM/7           Zi.Zj
                    269   PERPI JPRIM/11          Zi.Zj
   The mechanism has 2 redundant constraints which are equations that
   remove the same degrees of freedom as other constraints imposed upon the
   motion.  The redundant constraints will be deactivated for the simulation.
  
   =======================================================================
     Note carefully: The constraint reaction forces corresponding to the
                     inactive constraints will be set to zero.
   =======================================================================
   Generating the Jacobian matrix for the statics or quasi-statics problem.
  
   Jacobian Matrix Statistics for Statics
   ======================================================
   Number of equations ............. = 3271
   Number of non-zero entries ...... = 30626
   Percentage of matrix non-zero ... = 0.28624
   Total space used in MD array .... = 1106149
  
   Symbolic refactorization attempted at time = 0.0.
   The following equations impose the redundant constraints:
                    264   PERPI JPRIM/6           Zi.Zj
                    265   PERPI JPRIM/7           Zi.Zj
   The mechanism has 2 redundant constraints which are equations that
   remove the same degrees of freedom as other constraints imposed upon the
   motion.  The redundant constraints will be deactivated for the simulation.
  
   =======================================================================
     Note carefully: The constraint reaction forces corresponding to the
                     inactive constraints will be set to zero.
   =======================================================================


---- ERROR ----
   The simulation stopped at time = 5.2715 .  Adams cannot solve
   the equations of motion.
  
   The greatest error in an equation is 1.42501E-04 in the
   equation for GFORCE L_linear_uniform60.msc_truck_steer_wheels.tir_wheel.force .
  
   The greatest change in a variable is 3.00677E-14 in the
   variable for PART L_linear_uniform60.msc_truck_steer_suspension.ges_tie_rod .
  
   Try the following in this order:
       1.  Use the MAXIT argument on the EQUILIBRIUM, IC, KINEMATICS,
           or INTEGRATOR command to increase the maximum number of
           iterations.
       2.  Temporarily change the value of the PATTERN argument on the
           EQUILIBRIUM, IC, KINEMATICS, or INTEGRATOR command to
           PATTERN = T.
       3.  Temporarily increase the value of the ERROR argument on the
           EQUILIBRIUM, IC, KINEMATICS, or INTEGRATOR command at
           time = 5.2715 .
       4.  If one or more forces change rapidly or sharply near
           time = 5.2715, modify the force or forces.
  
---- ERROR ----
   SIMULATE command failed for minimaneuver: UNIFORM
   Aborting Execution.
   Terminating Adams/Car usersubs...
  
      Adams/Solver execution terminated by subprogram ERRMES
110705161554eb5500b2c77d62_jpg_thumb.jpg

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