DEM案例、知识汇总
1，案例：泥石流滑落
1）标准单位制
2）part123为侧壁；
*PART
$# title
diban
$# pid secid mid eosid hgid grav adpopt tmid
1 1 1 0 0 0 0 0
*SECTION_SHELL_TITLE
shashicao
$# secid elform shrf nip propt qr/irid icomp setyp
1 2 1.0 2 1.0 0 0 1
$# t1 t2 t3 t4 nloc marea idof edgset
0.01 0.01 0.01 0.01 0.0 0.0 0.0 0
*MAT_RIGID_TITLE
shashicao
$# mid ro e pr n couple m alias
1 2000.03.00000E10 0.3 0.0 0.0 0.0
$# cmo con1 con2
1.0 7 7
$#lco or a1 a2 a3 v1 v2 v3
0.0 0.0 0.0 0.0 0.0 0.0
*PART
$# title
landangban
$# pid secid mid eosid hgid grav adpopt tmid
2 2 2 0 0 0 0 0
*SECTION_SHELL_TITLE
landangban
$# secid elform shrf nip propt qr/irid icomp setyp
2 2 1.0 2 1.0 0 0 1
$# t1 t2 t3 t4 nloc marea idof edgset
0.01 0.01 0.01 0.01 0.0 0.0 0.0 0
*MAT_ELASTIC_TITLE
landangban
$# mid ro e pr da db not used
2 7850.02.00000E11 0.25 0.0 0.0 0.0
*PART
$# title
cebi
$# pid secid mid eosid hgid grav adpopt tmid
3 1 1 0 0 0 0 0
3）part200为dem；倾斜的，通过shell框起来，再删除shell part。
*PART
$# title
dem
$# pid secid mid eosid hgid grav adpopt tmid
200 200 200 0 0 0 0 0
*SECTION_SOLID_TITLE
dem
$# secid elform aet
200 1 0
*MAT_ELASTIC_TITLE
dem
$# mid ro e pr da db not used
200 2800.03.00000E10 0.3 0.0 0.0 0.0
3）DEM单元
*ELEMENT_DISCRETE_SPHERE_VOLUME
$# nid pid volume inertia radii
103527 2001.74486E-63.8929E-11 0.0074683
4.7lspp可以创建dem粒子，创建方法见下图：
