Abstract
The paper presents numerical modelling approaches for computing wave propagation and high-order harmonic generation in nonlinear media. This approach is based on two local computational methods, i.e. the Local Interaction Simulation Approach and the Cellular Automata for Elastodynamics. Discretized numerical dispersion curves are calculated and used for the entire analysis. A quantitative study of velocity matching between the fundamental and high-order harmonic waves is performed. The influence of propagation distance on the magnitude of high-order harmonics is evaluated for various excitation frequencies. Numerical analyses show divergence from analytical models for dispersion curves, especially for high-order harmonics. These preliminary investigations demonstrate that the numerical modelling approaches applied can be used effectively for nonlinear wavefield analysis; however, numerical instead of analytical spectral characteristics should be considered.
Original language | English |
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Title of host publication | 7th European Workshop on Structural Health Monitoring, EWSHM 2014 - 2nd European Conference of the Prognostics and Health Management (PHM) Society |
Publisher | INRIA |
Pages | 575-582 |
Number of pages | 8 |
Publication status | Published - 1 Jan 2014 |
Event | 7th European Workshop on Structural Health Monitoring, EWSHM 2014 - Nantes, France Duration: 8 Jul 2014 → 11 Jul 2014 |
Conference
Conference | 7th European Workshop on Structural Health Monitoring, EWSHM 2014 |
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Country/Territory | France |
City | Nantes |
Period | 8/07/14 → 11/07/14 |
Keywords
- Cellular Automata
- Guided elastic waves
- LISA
- Modelling
- Nonlinear wavefield
- Numerical simulations
ASJC Scopus subject areas
- Civil and Structural Engineering
- Safety, Risk, Reliability and Quality
- Building and Construction
- Computer Science Applications