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发表于 2012-9-27 22:01:46
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来自 美国
本帖最后由 rock_cumt 于 2012-9-27 22:02 编辑
没有算例,应该不难。我写段代码,没有测试,供参考
def pre_fill
;x0,x1,y0,y1,z0,z1, the coordinator of the container
;t_vol, total volume of the sample
;p_vol, pore volume of the sample;bnid is the new id ready for create new particle
bnid = 1
t_vol = (x1-x0)*(y1-y0)*(z1-z0) p_vol = t_vol
bp = ball_head
loop while bp # null
bnid = bnid +1
bp = b_next(bp)
endloop
end
;;=========
def _fill
;_n0 : desired porosity
;_n :current porosity
;(_x, _y,_z) position for new particle; _r is the radius for new particle
;rlow, rhi : smallest and biggest radius or the particles
_n = p_vol/t_vol
loop while _n>_n0
_r = rlow+urand*(rhi-rlow)
_x = _x0+_r+urand*(x1-x0-2*_r)
_y = _y0+_r+urand*(y1-y0-2*_r)
_z = _z0+_r+urand*(z1-z0-2*_r)
command
ball id bnid rad _r x _x y _y z _z
endcommand
bnid = bnid +1
p_vol = p_vol - 4*pi/3*(_r)^3
_n = p_vol/t_vol
endloop
end
Good Luck!
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