Outputs (20)

A framework for the propagation of uncertainty in Transfer Path Analysis (2020)
Journal Article

Transfer Path Analysis (TPA) is a test-based methodology used to analyse the propagation of noise and vibration
in complex systems. In this paper we present a covariance based framework for the propagation of experimental
uncertainty in classical,... Read More about A framework for the propagation of uncertainty in Transfer Path Analysis.

A covariance based framework for the propagation of correlated uncertainty in frequency based dynamic sub-structuring (2019)
Journal Article
Meggitt, J., & Moorhouse, A. (2020). A covariance based framework for the propagation of correlated uncertainty in frequency based dynamic sub-structuring. Mechanical Systems and Signal Processing, 136, 106505. https://doi.org/10.1016/j.ymssp.2019.106505

Dynamic sub-structuring (DS) is the procedure by which the passive properties (i.e. frequency response functions)
of an assembled structure are predicted from those of its constituent sub-structures. In this paper we are concerned
with the propagat... Read More about A covariance based framework for the propagation of correlated uncertainty in frequency based dynamic sub-structuring.

Robust NVH engineering using experimental methods - source characterization techniques for component Transfer Path Analysis and Virtual Acoustic Prototyping (2019)
Journal Article

A major challenge in automotive NVH engineering is to approach complex structure-borne sound and vibration problems with sufficient accuracy but reasonable experimental effort. Typical issues encountered are poor correlation between objective compone... Read More about Robust NVH engineering using experimental methods - source characterization techniques for component Transfer Path Analysis and Virtual Acoustic Prototyping.

Evaluation of uncertainties in classical and component (blocked force) transfer path analysis (TPA) (2019)
Journal Article

Transfer path analysis (TPA) has become a widely used diagnostic technique in the automotive and other sectors. In classic TPA, a two-stage measurement is conducted including operational and frequency response function (FRF) phases from which the con... Read More about Evaluation of uncertainties in classical and component (blocked force) transfer path analysis (TPA).

Development of a hybrid FE-SEA-experimental model (2019)
Journal Article
Clot, A., Meggitt, J., Langley, R., Elliott, A., & Moorhouse, A. (2019). Development of a hybrid FE-SEA-experimental model. Journal of Sound and Vibration, 452(Jul 19), 112-131. https://doi.org/10.1016/j.jsv.2019.03.027

The vibro-acoustic response of complex structures with uncertain properties is a problem of great concern for modern industries. In recent years, much research has been devoted to the prediction of this response in the mid-frequency range where, beca... Read More about Development of a hybrid FE-SEA-experimental model.

A covariance based framework for the propagation of uncertainty through inverse problems with an application to force identification (2019)
Journal Article
Meggitt, J., Moorhouse, A., & Elliott, A. (2019). A covariance based framework for the propagation of uncertainty through inverse problems with an application to force identification. Mechanical Systems and Signal Processing, 124, 275-297. https://doi.org/10.1016/j.ymssp.2018.11.038

Inverse problems are widely encountered in fields as diverse as physics, geophysics, engineering and finance.
In the present paper, a covariance based framework for the estimation of their uncertainty is presented and applied to the problem of inve... Read More about A covariance based framework for the propagation of uncertainty through inverse problems with an application to force identification.

Broadband characterisation of in-duct acoustic sources using an equivalent source approach (2018)
Journal Article
Meggitt, J., Elliott, A., Moorhouse, A., Banwell, G., Hopper, H., & Lamb, J. (2019). Broadband characterisation of in-duct acoustic sources using an equivalent source approach. Journal of Sound and Vibration, 442(Mar 19), 800-816. https://doi.org/10.1016/j.jsv.2018.10.041

This paper is concerned with the development of an experimental method capable of independently characterising low Mach number, in-duct fluid machines, such as pumps, fans, etc. The aim is to propose and test a source characterisation method that is... Read More about Broadband characterisation of in-duct acoustic sources using an equivalent source approach.

On the treatment of uncertainty in experimentally measured frequency response functions (2018)
Journal Article
Meggitt, J. (2018). On the treatment of uncertainty in experimentally measured frequency response functions. Metrologia, 55(6), 806. https://doi.org/10.1088/1681-7575/aadeeb

Frequency response functions (FRFs) are routinely used within experimental structural dynamics, among other fields. The uncertainty associated with their measurement is typically modelled on the simplified assumption that additive uncorrelated noise... Read More about On the treatment of uncertainty in experimentally measured frequency response functions.

In-situ sub-structure decoupling of resiliently coupled assemblies (2018)
Journal Article
Meggitt, J., & Moorhouse, A. (2019). In-situ sub-structure decoupling of resiliently coupled assemblies. Mechanical Systems and Signal Processing, 117, 723-737. https://doi.org/10.1016/j.ymssp.2018.07.045

The context of this paper is the increasing need for vibro-acoustic simulation across many sectors. A procedure
is derived for decoupling the components of resiliently mounted assemblies. An independent characterisation of
the components is obtaine... Read More about In-situ sub-structure decoupling of resiliently coupled assemblies.

In situ determination of dynamic stiffness for resilient elements (2015)
Journal Article

An in situ method for the measurement of a resilient lements dynamic transfer stiffness is outlined and alidated. Unlike current methods, the proposed in situ approach allows for the characterisation of a resilient element whilst incorporated into an... Read More about In situ determination of dynamic stiffness for resilient elements.