Abstract
Payload fairing of space rocket is excited by extremely high acoustic pressure over 150 dB when it is lift off, and equipped structures are also excited by the acoustic pressure field inside fairing. To secure tolerance for the failure of the structures, sound pressure level around them must be reduced. This paper proposes a design method to find the optimal layout of sound-absorbing material in order to minimize sound pressure level inside payload fairing by topology optimization. Numerical examples verified the proposed method gives physically acceptable results.
