Equipment that is destined for military and defence can expect to encounter some of the harshes environments that equipment will ever see. Regular rough handling, extreme conditions and frequent use will take their toll on equipment, some of which may be critical for survival or safety.
MIL-STD 810F Method 514.5
MIL-STD 810F Method 514.5 is suite of vibration testing designed to replicate the vibrations equipment will have to endure over its working life.
"2.1.1 Effects of environment.
Vibration results in dynamic deflections of and within materiel. These dynamic deflections and associated velocities and accelerations may cause or contribute to structural fatigue and mechanical wear of structures, assemblies, and parts. In addition, dynamic deflections may result in impacting of elements and/or disruption of function. Some typical symptoms of vibration-induced problems follow. This list is not intended to be all-inclusive:
a. Chafed wiring.
b. Loose fasteners/components.
c. Intermittent electrical contacts.
d. Electrical shorts.
e. Deformed seals.
f. Failed components.
g. Optical or mechanical misalignment.
h. Cracked and/or broken structures.
i. Migration of particles and failed components.
j. Particles and failed components lodged in circuitry or mechanisms.