求助：这段离散的高斯热源模型具体是什么意思

htcpro

!gaussian beam is defined here
!load function
*del,_fncname
*del,_fncmtid
*del,_fnc_c1
*del,_fnc_c2
*del,_fnc_c3
*set,_fncname,'hfgau1'
*dim,_fnc_c1,,1
*dim,_fnc_c2,,1
*dim,_fnc_c3,,1
*set,_fnc_c1(1),liradi    !liradi=3.6e+7  零件表面接受的 幅射密度
*set,_fnc_c2(1),vel        !vel=4e-3      激光的移动速度
*set,_fnc_c3(1),dilaser  !dilaser=2e-3 为激光的光斑直径
!/input,gau1.func
*dim,%_fncname%,table,6,21,1
!begin of epuation: liradi*exp(-2*(({x}-vel*{time})^2+{y}^2)/(0.5*dilaser)^2)
*set,%_fncname%(0,0,1),0.0,-999
*set,%_fncname%(2,0,1),0.0
*set,%_fncname%(3,0,1),%_fnc_c1(1)%
*set,%_fncname%(4,0,1),%_fnc_c2(1)%
*set,%_fncname%(5,0,1),%_fnc_c3(1)%
*set,%_fncname%(6,0,1),0.0
*set,%_fncname%(0,1,1),1.0,-1,0,0,0,0,0
*set,%_fncname%(0,2,1),0.0,-2,0,1,0,0,-1
*set,%_fncname%(0,3,1),0,-3,0,1,-1,2,-2
*set,%_fncname%(0,4,1),0.0,-1,0,2,0,0,-3
*set,%_fncname%(0,5,1),0.0,-2,0,1,-3,3,-1
*set,%_fncname%(0,6,1),0.0,-1,0,1,18,3,1
*set,%_fncname%(0,7,1),0.0,-3,0,1,2,2,-1
*set,%_fncname%(0,8,1),0.0,-1,0,2,0,0,-3
*set,%_fncname%(0,9,1),0.0,-4,0,1,-3,17,-1
*set,%_fncname%(0,10,1),0.0,-1,0,2,0,0,3
*set,%_fncname%(0,11,1),0.0,-3,0,1,3,17,-1
*set,%_fncname%(0,12,1),0.0,-1,0,1,-4,1,-3
*set,%_fncname%(0,13,1),0.0,-3,0,1,-2,3,-1
*set,%_fncname%(0,14,1),0.0,-1,0,0.5,0,0,19
*set,%_fncname%(0,15,1),0.0,-2,0,1,-1,3,19
*set,%_fncname%(0,16,1),0.0,-1,0,2,0,0,-2
*set,%_fncname%(0,17,1),0.0,-4,0,1,-2,17,-1
*set,%_fncname%(0,18,1),0.0,-1,0,1,-3,4,-4
*set,%_fncname%(0,19,1),0.0,-1,7,1,-1,0,0
*set,%_fncname%(0,20,1),0.0,-2,0,1,17,3,-1
*set,%_fncname%(0,21,1),0.0,99,0,1,-2,0,0
!end of equation:liradi*exp(-2*(({x}-vel*{time})^2+{y}^2/(0.5*dilaser)^2)
!end of gaussian beam