Contact parameter identification for vibrational response variability prediction

Ester Creixell Mediante*, Jonas Brunskog, Jakob Søndergaard Jensen, Martin Larsen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Variability in the dynamic response of assembled structures can arise due to variations in the contact conditions between the parts that conform them. Contact conditions are difficult to model accurately due to randomness in physical properties such as contact surface, load distribution or geometric details. Those properties can vary for a given structure due to the assembly and disassembly process, and also across nominally equal items that are produced in series. This work focuses on modeling the contact between small light-weight plastic pieces such as those used in the hearing aid industry, where the vibrational behavior of the structures within the hearing frequency range is critical for the performance of the devices. A procedure to localize the most probable contact areas and determine the most sensitive contact points with respect to variations in the modes of vibration of the assembled plastic parts is presented. The procedure uses a gradient-based optimization strategy that updates the stiffness constants of a number of contact spring elements to match experimental data. By identifying the contact parameters for several sets of experimental data measured under varying contact conditions, the variability of the contact parameters can be characterized.
Original languageEnglish
JournalApplied Acoustics
Volume129
Pages (from-to)291–305
ISSN0003-682X
DOIs
Publication statusPublished - 2018

Keywords

  • Contact modeling
  • Model updating
  • Vibrations
  • Structural acoustics
  • Linear modeling

Cite this

@article{73c9274c57be440381c3a1d000c960c1,
title = "Contact parameter identification for vibrational response variability prediction",
abstract = "Variability in the dynamic response of assembled structures can arise due to variations in the contact conditions between the parts that conform them. Contact conditions are difficult to model accurately due to randomness in physical properties such as contact surface, load distribution or geometric details. Those properties can vary for a given structure due to the assembly and disassembly process, and also across nominally equal items that are produced in series. This work focuses on modeling the contact between small light-weight plastic pieces such as those used in the hearing aid industry, where the vibrational behavior of the structures within the hearing frequency range is critical for the performance of the devices. A procedure to localize the most probable contact areas and determine the most sensitive contact points with respect to variations in the modes of vibration of the assembled plastic parts is presented. The procedure uses a gradient-based optimization strategy that updates the stiffness constants of a number of contact spring elements to match experimental data. By identifying the contact parameters for several sets of experimental data measured under varying contact conditions, the variability of the contact parameters can be characterized.",
keywords = "Contact modeling, Model updating, Vibrations, Structural acoustics, Linear modeling",
author = "{Creixell Mediante}, Ester and Jonas Brunskog and Jensen, {Jakob S{\o}ndergaard} and Martin Larsen",
year = "2018",
doi = "10.1016/j.apacoust.2017.08.011",
language = "English",
volume = "129",
pages = "291–305",
journal = "Applied Acoustics",
issn = "0003-682X",
publisher = "Pergamon Press",

}

Contact parameter identification for vibrational response variability prediction. / Creixell Mediante, Ester; Brunskog, Jonas; Jensen, Jakob Søndergaard; Larsen, Martin.

In: Applied Acoustics, Vol. 129, 2018, p. 291–305.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Contact parameter identification for vibrational response variability prediction

AU - Creixell Mediante, Ester

AU - Brunskog, Jonas

AU - Jensen, Jakob Søndergaard

AU - Larsen, Martin

PY - 2018

Y1 - 2018

N2 - Variability in the dynamic response of assembled structures can arise due to variations in the contact conditions between the parts that conform them. Contact conditions are difficult to model accurately due to randomness in physical properties such as contact surface, load distribution or geometric details. Those properties can vary for a given structure due to the assembly and disassembly process, and also across nominally equal items that are produced in series. This work focuses on modeling the contact between small light-weight plastic pieces such as those used in the hearing aid industry, where the vibrational behavior of the structures within the hearing frequency range is critical for the performance of the devices. A procedure to localize the most probable contact areas and determine the most sensitive contact points with respect to variations in the modes of vibration of the assembled plastic parts is presented. The procedure uses a gradient-based optimization strategy that updates the stiffness constants of a number of contact spring elements to match experimental data. By identifying the contact parameters for several sets of experimental data measured under varying contact conditions, the variability of the contact parameters can be characterized.

AB - Variability in the dynamic response of assembled structures can arise due to variations in the contact conditions between the parts that conform them. Contact conditions are difficult to model accurately due to randomness in physical properties such as contact surface, load distribution or geometric details. Those properties can vary for a given structure due to the assembly and disassembly process, and also across nominally equal items that are produced in series. This work focuses on modeling the contact between small light-weight plastic pieces such as those used in the hearing aid industry, where the vibrational behavior of the structures within the hearing frequency range is critical for the performance of the devices. A procedure to localize the most probable contact areas and determine the most sensitive contact points with respect to variations in the modes of vibration of the assembled plastic parts is presented. The procedure uses a gradient-based optimization strategy that updates the stiffness constants of a number of contact spring elements to match experimental data. By identifying the contact parameters for several sets of experimental data measured under varying contact conditions, the variability of the contact parameters can be characterized.

KW - Contact modeling

KW - Model updating

KW - Vibrations

KW - Structural acoustics

KW - Linear modeling

U2 - 10.1016/j.apacoust.2017.08.011

DO - 10.1016/j.apacoust.2017.08.011

M3 - Journal article

VL - 129

SP - 291

EP - 305

JO - Applied Acoustics

JF - Applied Acoustics

SN - 0003-682X

ER -