On the use of experimental ensembles in a hybrid deterministic-statistical energy analysis method

Clot-Razquin, A; Langley, RS; Meggitt, JWR; Moorhouse, AT; Elliott, AS

Abstract

There is a clear need in modern industries for models that can predict the vibro-acoustic response of their manufactured products at the design stage. Models based on the hybrid deterministic-statistical method are a suitable solution to overcome the challenge of predicting the response of complex built-up systems in the mid-frequency range. Despite its advantages, this approach may face limitations when some of the system's properties are extremely difficult to model. This can be the case for the direct field dynamic stiffness, a key parameter in the hybrid method formulation, which depends on the type of junction assumed between the structural components of the system. This work explores the possibility of using experimental measurements to determine this dynamic stiffness. The proposed approach, based on statistical properties of random frequency response functions, is applied to the case of point junctions on a large thin plate. The results obtained using the new approach are compared to those computed using numerical techniques. It is concluded that the use of experimental data can be a suitable alternative to numerical techniques when modelling the junctions between components of a complex structure.

Citation

Clot-Razquin, A., Langley, R., Meggitt, J., Moorhouse, A., & Elliott, A. On the use of experimental ensembles in a hybrid deterministic-statistical energy analysis method. Presented at International Conference on Noise and Vibration Engineering (ISMA) / International Conference on Uncertainty in Structural Dynamics (USD) 2020, Leuven, Belgium

• Presentation Conference Type: Other
• Conference Name: International Conference on Noise and Vibration Engineering (ISMA) / International Conference on Uncertainty in Structural Dynamics (USD) 2020
• Conference Location: Leuven, Belgium
• End Date: Sep 9, 2020
• Publication Date: Sep 8, 2020
• Deposit Date: Jun 10, 2021
• Book Title: Proceedings of international conference on noise and vibration engineering (ISMA2020) / international conference on Uncertainty in Structural Dynamics (USD2020)
• Publisher URL: http://past.isma-isaac.be/isma2020/proceedings/program/
• Related Public URLs: https://www.isma-isaac.be/
• Additional Information: Event Type : Conference; Funders : Engineering and Physical Sciences Research Council (EPSRC);Bentley Motors Ltd;Bruel Kjaer;Dyson Ltd;Wave six LLC; Grant Number: EP/P005489/1