Random vibration load factors

Abstract

In general, the structural design of spacecraft structures, instruments, and structural elements is based on the static load factors specified in the launch vehicle (L/V) user’s guide(s) or by other quasi-static load (QSL) specifications. In this chapter, the calculated random load factors are based on the 3 σ values of the interface loads of a particular system and depend on the random load levels, natural frequencies, and associated modal effective masses. If the random load factors are beyond the specified quasi-static load factors, adaptation (notching) of the random dynamic loads may be considered. Examples and problems with answers included are provided.