在命令里没设置阻尼比 ，2d里命令流貌似不识别damp，问下怎么加呢？还有最后出现错误
config dyn
grid 112 56
m e
gen 0 -140 0 0 280 0 280 -140 i=1 113 j=1 57
prop d 2000 sh 3e8 bu 5e8
call zuobiao.txt
gen table 1
model null region i=20 j=55
fix x i=1
fix x i=113
fix x y j=1
set grav=9.8
set large
his nstep=50
his ydis i=2 j=57
step 3000
ini xdis 0 ydis 0
free x y j=1
call nanmei.txt
apply xacc=1.0 hist table 2 j=1
his ydis i=3 j=57
his yvel i=3 j=57
solve ；请大家帮我看看啊 ，结果怎么变成那样，谢谢
