Page 60 - 201901

56 2019 年 1 月

8.0 -8.0
100
80
y/cm 60 К࠱ ّ࠱
40
20
0
-300 -200 -100 0 100 200 300
x/cm
(a) ൤К࠱
100
80
y/cm 60 К࠱ ّ࠱
40
20
0
-300 -200 -100 0 100 200 300
x/cm
(b) 20OபК࠱
100
80
y/cm 60 К࠱ ّ࠱
40
20
0
-300 -200 -100 0 100 200 300
x/cm
(c) 45OபК࠱
100
80
y/cm 60 ّ࠱
40
20 К࠱
0
-300 -200 -100 0 100 200 300
x/cm
(d) 60OபК࠱
图 5 声反射器的有限元声场仿真
Fig. 5 Simulated acoustic pressure fields of the retrodirective reflector by FEM
8.0 -8.0
100
80
y/cm 60 К࠱ ّ࠱
40
20
0
-300 -200 -100 0 100 200 300
x/cm
(a) f=1 kHz
100
80
y/cm 60 К࠱ ّ࠱
40
20
0
-300 -200 -100 0 100 200 300
x/cm
(b) f=2 kHz
100
80
y/cm 60 К࠱ ّ࠱
40
20
0
-300 -200 -100 0 100 200 300
x/cm
(c) f=3 kHz
100
80
y/cm 60 ّ࠱
40
20 К࠱
0
-300 -200 -100 0 100 200 300
x/cm
(d) f=4 kHz
图 6 不同频率下的仿真声场
Fig. 6 Simulated acoustic pressure fields of the retrodirective reflector at different frequencies