Accelerating the fatigue analysis based on strain signal using Hilbert–Huang transform

Nadia Nurnajihah Nadia, Salvinder Singh, Shahrum Abdullah, Sallehuddin Mohamed Haris

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Purpose: The purpose of this paper is to present the application of Hilbert–Huang transform (HHT) for fatigue damage feature characterisation in the time–frequency domain based on strain signals obtained from the automotive coil springs. Design/methodology/approach: HHT was employed to detect the temporary changes in frequency characteristics of the vibration response of the signals. The extraction successfully reduced the length of the original signal to 40 per cent, whereas the fatigue damage was retained. The analysis process for this work is divided into three stages: signal characterisation with the application of fatigue data editing (FDE) for fatigue life assessment, empirical mode decomposition with Hilbert transform, an energy–time–frequency distribution analysis of each intrinsic mode function (IMF). Findings: The edited signal had a time length of 72.5 s, which was 40 per cent lower than the original signal. Both signals were retained statistically with close mean, root-mean-square and kurtosis value. FDE improved the fatigue life, and the extraction did not affect the content and behaviour of the original signal because the editing technique only removed the minimal fatigue damage potential. HHT helped to remove unnecessary noise in the recorded signals. EMD produced sets of IMFs that indicated the differences between the original signal and mean of the signal to produce new components. The low-frequency energy was expected to cause large damage, whereas the high-frequency energy will cause small damage. Originality/value: HHT and EMD can be used in the strain data signal analysis of the automotive component of a suspension system. This is to improve the fatigue life, where the extraction did not affect the content and behaviour of the original signal because the editing technique only removed the minimal fatigue damage potential.

Original languageEnglish
Pages (from-to)118-132
Number of pages15
JournalInternational Journal of Structural Integrity
Volume10
Issue number1
DOIs
Publication statusPublished - 4 Feb 2019

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Fatigue damage
Fatigue of materials
Signal analysis
Decomposition

Keywords

  • Energy
  • Fatigue
  • Hilbert–Huang transform
  • Signal
  • Time–frequency analysis

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Accelerating the fatigue analysis based on strain signal using Hilbert–Huang transform. / Nadia, Nadia Nurnajihah; Singh, Salvinder; Abdullah, Shahrum; Mohamed Haris, Sallehuddin.

In: International Journal of Structural Integrity, Vol. 10, No. 1, 04.02.2019, p. 118-132.

Research output: Contribution to journalArticle

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