\ Downloaded from https://www.everyspec.com MIL-STD-81OD 19 July 1983 A-3.3.8 In the made: ., test specificatioridevelopment, the following assumptions are ,. ”,. a. Test item response along off-axes la negligible. Thi9 may acceptable assumption and ie evaluated during testing. T~8t durations are reduced accordingly; with particular consideration given to critical;:)“’‘“”~”,..:: frequencies. ,;,f- b. A difference between the mechanical impedances of field and laboratory test item mountings is acceptable. Field and laboratory frequency response functions are compared to evaluate this.
If it is determined that this is not a valid assumption, average, extremal andlor response control are considered to minimize any mismatch of mechanical impedance. This is particularly signifi- cant for massive teat items. c. Test item response is constant with temperature. That is, the test may be conducted at temperatures other than those for which field data was obtained. .... METHOD 514.3 APPENDIX A 19 July 1983 514.3-82