Vibration is a topic that occasionally raises its head in different ways for different platforms and can be especially problematic for helicopters.

For helicopters, AFD is regularly engaged to support Permit to Fly applications with a vibration assessment to ensure that the equipment being installed does not naturally vibrate at the same harmonic frequencies as the main or tail rotors.

On fixed wing platforms, AFD has experience in the design and structural optimisation of trailing edge devices on both military and civilian aircraft, paying special attention to mass distribution, stiffness and aeroelastics.

For large civil aircraft AFD is also capable of supporting analysis to comply with OEM prescribed requirements associated with sustained engine imbalance caused by windmilling or high power conditions.