Comparison of shockinduced displacements with displacements produced by a centrifuge acceleration
Abstract
Verification of the functional reliability of some electrical components under the action of mechanical shock is often desired. As an example, contact chatter of the normally open contact points in a thermal switch is a possible failure model which must be screened out by testing. Theoretically, it should be possible to do this acceptance testing with a centrifuge at a lower cost if one could determine the centrifuge acceleration level needed to produce the maximum displacement that could be realized under a given shock loading. A method was derived to determine this displacement relationship for the two different types of loads. A superpositionofmodes technique was used to develop the relationship. Numerical results are presented for a simple cantilever where closedform solutions for modal parameters are readily available. This numerical result is then compared with the centrifugeinduced displacement to determine the desired relationship. This result was then successfully used to infer the centrifuge level needed to test a small, mechanically complicated, thermal switch.
 Publication:

Presented at the 3rd Intern. Modal Analysis Conf
 Pub Date:
 1984
 Bibcode:
 1984ima..conf.....P
 Keywords:

 Cantilever Beams;
 Centrifuging;
 Displacement;
 Electric Switches;
 Shock Loads;
 Mechanical Shock;
 Numerical Analysis;
 Instrumentation and Photography