Future Aircraft INTeriOr Noise and VibrATion Evaluation
INTONATE
Engines and aerodynamics are major causes of aircraft noise. This applies to exterior noise as well as interior noise in the cabin. The INTONATE project is therefore focussing on cabin noise.
Motivation and background
The designs of future aeroplanes will be increasingly measured against the criteria of environmental compatibility and sustainability. In addition to aerodynamic technologies for drag reduction, innovative engine designs and their integration or configurative arrangement are key design drivers for reducing fuel consumption.
However, engines and aerodynamics are the main causes of aircraft noise. This applies to exterior noise as well as interior noise in the cabin. This is why the INTONATE project is focussing on cabin noise.
The lack of analysis tools for predicting noise levels in the cabin with sufficient accuracy inevitably leads to development risks. If the noise levels in the cabin were only determined experimentally during test flights, the possible introduction of subsequent measures to reduce them could be cost-intensive and jeopardise or delay the scheduled entry into service of newly developed aircraft.
Challenges
Analysing cabin noise is a complex interdisciplinary task with many different causes. As the complete analysis chain is an absolute novelty, suitable interfaces must be created between the project partners' tools, which have so far mostly operated separately from each other. The various sources of noise and vibration must be taken into account, as well as the different transmission paths via fluid and structure through to the cabin cavity. Virtualisation of the cabin and auralisation of the calculated sound levels are planned in order to take the passengers' sense of comfort into account.
Noise and vibration sources and their transmission paths to the aircraft cabin to the receiver
