66
L. Wugang et al.
Fig. 6.2 Numerical model
of hypervelocity impact and
gauges
Table 6.1 Representation of different gauges from the impact damage source (unit: mm)
Gauges
Distance
Gauges
Distance
Gauges
Distance
Gauges
Distance
1
10
12
65
23
140
34
250
2
15
13
70
24
150
35
260
3
20
14
75
25
160
36
270
4
25
15
80
26
170
37
280
5
30
16
85
27
180
38
290
6
35
17
90
28
190
39
300
7
40
18
95
29
200
40
320
8
45
19
100
30
210
41
340
9
50
20
110
31
220
42
360
10
55
21
120
32
230
43
380
11
60
22
130
33
240
44
400
6.4 Cross-Correlation at Different Propagation Distances
Figure 6.3 shows the cross-correlation coefficients at different propagation distances
to the impact source. The climax of each curve presents the self-correlation coefficient, and the others mean the cross correlation between the signal at the climax and
at the other gauges. We can see that there exists a steep drop in small extent from the