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Equivalent Radiated Power (ERP) is a well-known criterion to evaluate the structure-borne noise.
The formulation of Equivalent Radiated Power (ERP) is as follows.
Equivalent Radiated Power (ERP) uses the normal velocity of each element, it can be calculated using MFBD result without complicated coupled vibro-acoustic simulation. Of course, the coupled simulation between air and structure can give more accurate result, and it requires very complicated modeling and a lot of computational cost.
In
RecurDyn/Acoustics
, by using Equivalent Radiated Power, users can predict the structure-borne noise and where it mainly comes from.(In general, minimizing ERP reduces the noise and vibration of the structure.)
The advantages of Equivalent Radiated Power (ERP)
- Much less computational cost compared to the coupled vibro-acoustic simulation
- No air (Fluid) modeling is required
- Especially useful for the structure-borne sound which is caused by vibration of the structure
- Suitable for the acoustic performance optimization using geometry modification in many cases
Contour plot of Equivalent Radiated Power (ERP)
You can calculate Equivalent Radiated Power (ERP) using RecurDyn/Acoustics to evaluate the NVH of the flexible multi-body system.
Watch this webinar now to learn how Equivalent Radiated Power (ERP) is used for NVH analysis!
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Reference for Equivalent Radiated Power)
1. Comparison of Vibro-acoustic Performance Metrics in the Design and Optimization of Stiffened Composite Fuselages
Author2: Serhat, Gökhan
Inter.noise 2016
2. FE based measures for structure borne sound radiation
Authors: Matthias KLAERNER, Steffen MARBURG, Lothar KROLL
Inter.noise 2014
