Vibration Environment and the Rockets

Rockets are subjected to vibrations in various operational phases. Source of vibration may be due to air turbulence, propeller noise, engine noise, stage separation, pyro ignition, release mechanism etc. Some of the sections of rocket houses electronic equipments for data acquisition, navigation purposes etc. Any Structure possessing mass and elasticity vibrate under external disturbances. Electronic equipment can be subjected to many different forms of vibration over a wide range of frequencies and acceleration levels. Vibration is usually considered to be an detrimental condition and can produce many different types of failures in electronic equipment. It is always an endeavour to alleviate or minimize the vibration amplitudes. Wide variety of structures and their components are susceptible to vibration as they are subjected to time dependent forces. If the vibration amplitude of structure escalates to the upper levels, the failure of structures takes place. Vibration suppression has greater significance for aero-space structures, which houses sophisticated electronic equipments, as the high vibration amplitudes hinder the performance of such equipments. In this study it is demonstrated that Tuned Mass Dampers (TMDs) placed with individual modal tuning shows satisfactory performance for the structure subjected to wide band harmonic excitation, transient or random excitations.