 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-18404(NOrd)
4.4.1.2 Direction of test. - Vibration tests shall be conducted in the
three (3) mutually perpendicular directions of the torpedo axes as defined in
3.1.14.
4.4.1.3 Vibration test procedure.
SCHEDULE I
Frequency .
Minimum Test Duration
Room Temperature -20F.
+ 130%.
Range
Amplitude
10 - 30 cps
0.060 0.006 inches
60 min.
15 min.
15 min.
31 - 60 cps
60 min.
15 min.
15 min.
3g 0.3g
61 - 100 cps
3g 0.3g
60 min.
15 min.
15 min.
The frequency shall be continuously varied between each of the limits
given, at a uniform rate over a 3 to 5 minute period for the duration of the
test.
As an alternate method the torpedo shall be vibrated at specific fre.
quencies differing by not more than 5 cps in each of the test axes and covering
the entire frequency range and amplitudes of schedule I. The total test time
shall not be less than that of schedule I and the test times at the specific
frequencies shall be equally divided.
4.4.1.3.2
shall be vibrated according
to schedule II
SCHEDULE 11
Minimum Test Duration
Frequency Range
Room Temperature
Amplitude
20 -60 cps
1g 0.1g
15 min.
61 - 150 cps
1g 0.1g
15 min.
The frequency shall be continuously varied between each of the limits given at
a uniform rate over a 3 to 5 minute period for the duration of the test.
An an alternate method the torpedo shall be vibrated at specific fre-
quencies differing by not more than 5 cps in each of the test axes and cover-
ing the entire frequency range and amplitude of schedule II. The total test
time shall not be less than that of schedule II and the test times at the
specific frequencies shall be equally divided.
8
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals