Ground Test Vibrations as non-conservative mean of compliance for vibration airworthiness requirements of A/C mechanical systems design

Vibrations requirements for A/C mechanical systems design are limited to series of standard environmental test conditions and procedures, which may be used to support compliance, as RTCA-DO160 or MIL-STD. Nevertheless, these procedures could be non- conservative in systems embedded in high airflow due to the fluid-structure coupling. This paper describes an example of real engineering equipment as the APU flap door where the previously described situation takes place.