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第 37 卷 第 6 期 王颖等： 孔隙介质与液体界面上波动方程数值模拟的改进方案——MPML 边界条件的应用 853

20
40
60
80
ᡰሏ/m 100 ̌ߘ
120
140
160 v p =3.5 km/s v p =2.5 km/s v p =3.5 km/s
v s =2.0 km/s v s =1.2 km/s v s =2.0 km/s
180
200
50 100 150 200
ᡰሏ/m
图 4 充填液体的井孔模型
Fig. 4 Borehole model with liquid filling

0.1 m 0.1 0 0.1 m 0.1
-0.1 -0.1
0.1
0.1
0.5 m 0 0.5 m
-0.1 -0.1
0.1
0.1
0.9 m 0 0.9 m
-0.1 -0.1
0.1
0.1
1.3 m 0 1.3 m
-0.1 -0.1
0.1
0.1
1.7 m 0 1.7 m
-0.1 -0.1
0.1
0.1
1.9 m 0 1.9 m
-0.1 -0.1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
ᰦ䰤/10 -3 s ᰦ䰤/10 -3 s
(a) PML (b) MPML
图 5 不同源距处接收信号，记录长度 9 ms
Fig. 5 Signal at different source-receiver distances with record length of 9 ms

T10 33
0.1 m 0 0.1 m 0.1 0
2
-2 2 -0.1
0.5 m 0 0.5 m 0.1 0
-2 2 -0.1
0.9 m 0 0.9 m 0.1 0
-2 2 -0.1
1.3 m 0 1.3 m 0.1 0

-2 2 -0.1
1.7 m 0 1.7 m 0.1 0
-2 2 -0.1
1.9 m 0 1.9 m 0.1 0
-2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
௑ᫎ/s ௑ᫎ/s
(a) PML (b) MPML
图 6 不同源距处接收信号，记录长度 0.9 s
Fig. 6 Signal at different source-receiver distances with record length of 0.9 s