请教attach命令

Running007

看来有interface的时候是不能用attach的，应力数值见底了好几个数量级

Running007

楼主你好，我研究了下interface和attach的问题，把你的模型网格划分一致，使计算时不需要使用interface和attach。然后查看位移云图，发现
1.使用interface后再用attach是错误的，从z方向的变形就可以看出来，楼主的模型使用attach时的z方向位移云图（下面的interface-attach图）与我修改后的模型的z方向位移云图（下面的no-interface-no-attach图）有较大差别。而楼主的模型在不使用attach时的z方向位移云图（下面的interface-no-attach图）与我修改后的模型的z方向位移云图（下面的no-interface-no-attach图）相近。下面是我修改过的网格大小适应的模型。

1. ;config dynamic
   
2. ;set log on
   
3. new
   
4. ;------create soil and placity board---------------
   
5. gen zone brick p0  0.0 0.0 0.0 p1 3.0 0.0 0.0 p2  0.0 2.4 0.0 p3  0.0 0.0 1.0 size 10 8 5  ;group soil
   
6. gen zone brick p0 -0.2 0.0 0.0 p1 0.0 0.0 0.0 p2 -0.2 2.4 0.0 p3 -0.2 0.0 1.0 size 1  8 5 ; group leftplacity
   
7. gen zone brick p0  3.0 0.0 0.0 p1 3.2 0.0 0.0 p2  3.0 2.4 0.0 p3  3.0 0.0 1.0 size 1  8 5  ;group rightplacity
   
8. 
   
9. gen zone brick p0 -0. -1.2  0.0 p1  3. -1.2  0.0 p2 -0. -1.0  0.0 p3 -0 -1.2 1.0 size 10 1 5           ;group front
   
10. gen zone brick p0 -0.  3.4  0.0 p1  3.  3.4  0.0 p2 -0.  3.6  0.0 p3 -0.  3.4 1.0 size 10 1 5           ;group behind
    
11. gen zone brick p0 -0.2  3.4  0.0 p1  0  3.4  0.0 p2 -0.2  3.6  0.0 p3 -0.2  3.4 1.0 size 1 1 5
    
12. gen zone brick p0 3.0  3.4  0.0 p1  3.2  3.4  0.0 p2 3.  3.6  0.0 p3 3  3.4 1.0 size 1 1 5
    
13. gen zone brick p0 -0.2  -1.2  0.0 p1  0  -1.2  0.0 p2 -0.2  -1.0  0.0 p3 -0.2  -1.2 1.0 size 1 1 5
    
14. gen zone brick p0 3  -1.2  0.0 p1  3.2  -1.2  0.0 p2 3  -1.0  0.0 p3 3  -1.2 1.0 size 1 1 5
    
15. pause
    
16. ;------create group-----------
    
17. group placity range x -0.2 0.0
    
18. group placity range x  3.0 3.2
    
19. group soil range x 0 3
    
20. group box-1 range x -0.2 3.2 y -1.2 -0.2 z 0.0 1.0
    
21. group box-2 range x -0.2 3.2 y  3.4  3.6 z 0.0 1.0
    
22. pause
    
23. ;------create interface-------
    
24. interface 1 face range y 0.0
    
25. interface 2 face range y 2.4
    
26. ini y add  1.0 range group box-1
    
27. ini y add -1.0 range group box-2
    
28. 
    
29. plot block group
    
30. pause
    
31. ;----- interface parameters-------
    
32. ;interface 1 prop ks 1e8 kn 1e5 fric 30
    
33. ;interface 2 prop ks 1e8 kn 1e5 fric 30
    
34. 
    
35. ;-----assign material parameters-----
    
36. model elas range group placity
    
37. prop bulk 6.88e6 shear 1.475e6
    
38. ini dens 15
    
39. 
    
40. model elas range group soil
    
41. prop bulk 5.2e7 shear 1.1e7 range group soil
    
42. ini dens 1760 range group soil
    
43. 
    
44. model elas range group box-1
    
45. prop bulk 6.88e6 shear 1.475e6 range group box-1
    
46. ini dens 1800 range group box-1
    
47. 
    
48. model elas range group box-2
    
49. prop bulk 5.2e9 shear 1.1e9 range group box-2
    
50. ini dens 1800 range group box-2
    
51. 
    
52. ;--------fix boundary----------
    
53. fix x range x -0.2001 -0.1999
    
54. fix x range x  3.1999  3.2001
    
55. fix y range y -0.2001 -0.1999
    
56. fix y range y  2.5999  2.6001
    
57. fix z range z -0.0001  0.0001
    
58. ;set dyna off
    
59. set grav 0 0 -10
    
60. 
    
61. ;attach face
    
62. 
    
63. hist unbal
    
64. hist gp zdis 1.5 1.2 1.0
    
65. 
    
66. cy 1000

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韩小帅562398340

受教了，学到了很多关于attach和interface的用法

silencelxk

领教了  ，好的东西，谢谢楼主