【讨论】李军整车模型修改大全！ 欢迎补充

wangzx

如果点了render
  
如果按李军的做
基本上也没有问题
是不是你把方向搞反了

wangzx

render就是工具栏上最左下的那个按钮

wtcat

wangzx你好，首先谢谢你的答复，但是我这个提示出现后仿真就失败了，并不是象MSC专家所说的那样，具体提示如下，还望帮着解决万分感谢！
WARNING:    For TIRE jeep.TIRE_1 the absolute value of the longitudinal slip ratio
   has gone beyond its maximum allowable limit of 1.0.
  
   Longitudinal slip ratio = 1.0247.
  
   If the longitudinal slip ratio is positive, it will be set
   to 1.0 (braking).  If the longitudinal slip ratio is
   negative, it will be set to -1.0 (traction).
WARNING:    For TIRE jeep.TIRE_3 the absolute value of the longitudinal slip ratio
   has gone beyond its maximum allowable limit of 1.0.
  
   Longitudinal slip ratio = 1.0038.
  
   If the longitudinal slip ratio is positive, it will be set
   to 1.0 (braking).  If the longitudinal slip ratio is
   negative, it will be set to -1.0 (traction).
WARNING:    For TIRE jeep.TIRE_3 the lateral slip ratio has gone beyond its
   maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.1956.
   Lateral slip ratio (S_alpha) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_3 the lateral slip value due to combined slip
   and camber has gone beyond its maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.1956.
   Camber angle       (gamma) = 2.32903E-02.
   Combined lateral slip ratio due to slip angle and Camber angle
   (S_alpha_gamma) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_3 the comprehensive slip value due to longitudinal
   slip, lateral slip and camber has gone beyond its maximum allowable
   limit of 1.0.
  
   Longitudinal slip  (s)     = 0.30616.
   Lateral slip angle (alpha) = -1.1956.
   Camber angle       (gamma) = 2.32903E-02.
   Comprehensive slip (S_slip_alpha_gamma)  = 1.0458.
  
   It is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the lateral slip ratio has gone beyond its
   maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.2949.
   Lateral slip ratio (S_alpha) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the lateral slip value due to combined slip
   and camber has gone beyond its maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.2949.
   Camber angle       (gamma) = -1.59308E-02.
   Combined lateral slip ratio due to slip angle and Camber angle
   (S_alpha_gamma) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the comprehensive slip value due to longitudinal
   slip, lateral slip and camber has gone beyond its maximum allowable
   limit of 1.0.
  
   Longitudinal slip  (s)     = 6.16217E-02.
   Lateral slip angle (alpha) = -1.2949.
   Camber angle       (gamma) = -1.59308E-02.
   Comprehensive slip (S_slip_alpha_gamma)  = 1.0019.
  
   It is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the absolute value of the longitudinal slip ratio
   has gone beyond its maximum allowable limit of 1.0.
  
   Longitudinal slip ratio = 1.1533.
  
   If the longitudinal slip ratio is positive, it will be set
   to 1.0 (braking).  If the longitudinal slip ratio is
   negative, it will be set to -1.0 (traction).
WARNING:    For TIRE jeep.TIRE_4 the lateral slip ratio has gone beyond its
   maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.0931.
   Lateral slip ratio (S_alpha) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the lateral slip value due to combined slip
   and camber has gone beyond its maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.0931.
   Camber angle       (gamma) = -1.59243E-02.
   Combined lateral slip ratio due to slip angle and Camber angle
   (S_alpha_gamma) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the comprehensive slip value due to longitudinal
   slip, lateral slip and camber has gone beyond its maximum allowable
   limit of 1.0.
  
   Longitudinal slip  (s)     = 0.44976.
   Lateral slip angle (alpha) = -1.0931.
   Camber angle       (gamma) = -1.59243E-02.
   Comprehensive slip (S_slip_alpha_gamma)  = 1.0965.
  
   It is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_1 the absolute value of the longitudinal slip ratio
   has gone beyond its maximum allowable limit of 1.0.
  
   Longitudinal slip ratio = 1.0866.
  
   If the longitudinal slip ratio is positive, it will be set
   to 1.0 (braking).  If the longitudinal slip ratio is
   negative, it will be set to -1.0 (traction).
WARNING:    For TIRE jeep.TIRE_4 the absolute value of the longitudinal slip ratio
   has gone beyond its maximum allowable limit of 1.0.
  
   Longitudinal slip ratio = 1.2997.
  
   If the longitudinal slip ratio is positive, it will be set
   to 1.0 (braking).  If the longitudinal slip ratio is
   negative, it will be set to -1.0 (traction).
WARNING:    For TIRE jeep.TIRE_4 the lateral slip ratio has gone beyond its
   maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.1171.
   Lateral slip ratio (S_alpha) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the lateral slip value due to combined slip
   and camber has gone beyond its maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -1.1171.
   Camber angle       (gamma) = 1.59320E-02.
   Combined lateral slip ratio due to slip angle and Camber angle
   (S_alpha_gamma) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_4 the comprehensive slip value due to longitudinal
   slip, lateral slip and camber has gone beyond its maximum allowable
   limit of 1.0.
  
   Longitudinal slip  (s)     = 0.71257.
   Lateral slip angle (alpha) = -1.1171.
   Camber angle       (gamma) = 1.59320E-02.
   Comprehensive slip (S_slip_alpha_gamma)  = 1.2279.
  
   It is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_1 the absolute value of the longitudinal slip ratio
   has gone beyond its maximum allowable limit of 1.0.
  
   Longitudinal slip ratio = 1.0231.
  
   If the longitudinal slip ratio is positive, it will be set
   to 1.0 (braking).  If the longitudinal slip ratio is
   negative, it will be set to -1.0 (traction).
WARNING:    For TIRE jeep.TIRE_1 the lateral slip ratio has gone beyond its
   maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -0.81662.
   Lateral slip ratio (S_alpha) is being set to 1.0.
WARNING:    For TIRE jeep.TIRE_1 the lateral slip value due to combined slip
   and camber has gone beyond its maximum allowable limit of 1.0.
  
   Lateral slip angle (alpha) = -0.81662.
   Camber angle       (gamma) = 2.70006E-02.
   Combined lateral slip ratio due to slip angle and Camber angle
   (S_alpha_gamma) is being set to 1.0.
WARNING:    A total of 20 warnings have been issued for trimming of slip
   values that have exceeded their limits.  ADAMS will no longer
   issue warnings when it trims longitudinal slip ratios,
   lateral slip ratios due to slip angle, lateral slip ratios
   due to combined slip and camber angles, and comprehensive
   slip values.
WARNING:    The symbolic refactorization failed.  The matrix is structurally singular
   at time = 1.48612E-03.
WARNING:    The corrector has not converged after 6 attempts. No. of iterations = 10.
WARNING:    The corrector has not converged after 2 attempts. No. of iterations = 10.
WARNING:    The corrector has not converged after 2 attempts. No. of iterations = 10.
WARNING:    The corrector has not converged after 2 attempts. No. of iterations = 10.
WARNING:    The corrector has not converged after 2 attempts. No. of iterations = 10.
WARNING:    The corrector has not converged after 2 attempts. No. of iterations = 20.
ERROR:      The simulation stopped at time = 3.83226E-03 .  ADAMS cannot solve
   the equations of motion.
  
   The greatest error in an equation is 99016. in the
   equation for GFORCE jeep.TIRE_1.GFORCE_16912385 .
  
   The greatest change in a variable is 2.56407E-13 in the
   variable for PART jeep.centerlink .
  
   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
          &nbspATTERN = T.
       3.  Temporarily increase the value of the ERROR argument on the
           EQUILIBRIUM, IC, KINEMATICS, or INTEGRATOR command at
           time = 3.83226E-03 .
       4.  If one or more forces change rapidly or sharply near
           time = 3.83226E-03, modify the force or forces.
  
ERROR:   Simulation failure detected

wtcat

wangzx你好，你有没有信箱，我把我的整车模型发给你，你帮我看看问题出在哪？

richardli1353

我还以为李军上面是错的，呵呵，我擅自将它改了模型才能出来，晕！
具体的地面数据文件我改为：
! -----------------------------
!  |Road_Data_File|
! -----------------------------
!
!  jeep road file-flat
!
  
METHOD:
GENDATA
  
!
! Conversion factors
!
X_SCALE
1.0
Y_SCALE
1.0
Z_SCALE
1.0
!
!Road origin is located at the following global coordinates in the  
!data set.
!
ORIGIN
0 0 0
UP
0.0,1.0,0.0
!
!Road coordinate system is oriented with respect to the global origin  
!by the following transformation matrix.
!
ORIENTATION
1  0  0
0  1  0
0  0  1
!
!Coordinates for the node points on road
!
NODES
4
1   10000.0  0.0  -10000.0
2   -10000.0  0.0  -10000.0
3   10000.0  0.0  10000.0
4   -10000.0  0.0  10000.0
!
!Connectivity of node points defining the triangular element
!
ELEMENTS
2
1   2   3   1.0   1.0
2   3   4   1.0   1.0
  
书上的Nodes
4
1   200000.0  0.0  -200000.0
2   -500000.0  0.0  -20000.0
3   200000.0  0.0  400000.0
4   -500000.0  0.0  400000.0

wangzx

richardli1353 你挺厉害的
我还不知道怎么弄这个路面文件呢
  
怎么样将它铺的大一点
我的车子一不小心就掉下去了

richardli1353

wangzx：汗！其实我也是没有办法才改的呀！真的不知道我哪里有问题！

richardli1353

wtcat 和wangzx ：你好，你能不能把模型画好的给我看看，也让我感受一下运动的快乐！谢谢了！我的邮箱是liqiang135@163.com

flyzp

wangzx ：你好！
         你一定也做过李军的前悬架模型吧。这里我有些问题很是搞不懂，想向你请教，什么是上横臂在汽车横平面的倾角，上横臂的水平斜置角，若是按一般的想法，设计点UCA_inner的三维坐标（P107）的算法是不是有点问题？

paor815

wangzx wrote:
斑竹说目前只有清华，吉林工大和一汽能做这个实验

  
按我了解的，应该是这样的。

浪之颠

这个模型最近大家做的怎么样了？好像很久没有人在讨论这个问题了。
我的model加force也是能够跑起来。但存在的问题就是施加有的force会出错，而且在计算的时候好像不太稳定，不知道有没有人遇到类似的问题？

xianghr

各位，我自己建的三轴的整车模型，怎么每次仿真都出现这样的问题：
ERROR:      The system matrix has a zero pivot for column 7, which is associated  with PART/3 Xdot.  Consequently, the matrix is numerically singular.
ERROR:   Abnormal termination encountered in Solver.
请问各位怎么修改。还有我在车轮和转向节之间加了motiom以后还是不能动。为什么？

wjiybb

这是哪本书啊

idealdesign

我怎么按前面做的，结果前面两个轮子还没接触地面，后面的两个轮子有部分在地面下，是怎么回事，谢谢

idealdesign

我的路面怎么和X轴有个夹角？

浪之颠

路面有夹角，应该是你的路面谱文件有问题。查看一下，四个节点的Y坐标是不是都是零