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MIL-HDBK-781 C. ON-BOARD EQUIPMENT HIGH SPEED otherwise, us* St ll dynamic pressures. q. Wopm) -T&. (0m. (OVL)) vibration factor 2(No wight reduction factor) I***- Mach *0.45 . SJ9x10- ~~ 3d! /OCTAVE fli(OVL) 1.0 K - 3d B/OCTAVE 10 ISO 300 1500 2000 FREQUENCY (Hz) >. BUFFET-ASSEMBLED STORES AND ON BOARD EQUIPMENT. (Saiactad occurrences by manauvars of mission) 2.0 1.0 ! o o.i 0.01 0.001 H..A fa U FREQUENCY (Hz) Tims of application of spactrum :f seconds, par occurrence, minimum 3 occurrancas par mission. fl>SHt fj 20 Hx NOTES: 1. This spactrum will ba superimposed on tha applicable accalaration PSO spectra of FIGURES 135 and 13*. according to tha mission profile definition of flight phasing of buffet 2. Weight reduction factor net applicable for this spactrum. 3. Saa TASLE 49 for equations to solve for M<. Mi. Ai and A>. FIGURE 149. Unit arms (OVLVacceleration PDS versus frequency spectra (Continued) .383

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