This paper gives an overview of the use of inverse methods in damage detection and location, using measured vibration data. Inverse problems require the use of a model and the identification of uncertain parameters of this model. Damage is often local in nature and although the effect of the loss of stiffness may require only a small number of parameters, the lack of knowledge of the location means that a large number of candidate parameters must be included. This paper discusses a number of problems that exist with this approach to health monitoring, including modelling error, environmental effects, damage localization and regularization.

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Damage identification using inverse methods

There are a number of approaches to the modeling of cracks in beam structures reported in the literature, that fall into three main categories; local stiffness reduction, discrete spring models, an...

/pdf/crack-modeling-for-structural-health-monitoring-3m92wlwnz0.pdf

Crack Modeling for Structural Health Monitoring

Experimental damage detection of cracked beams by using nonlinear characteristics of forced response

A review on the vibration analysis for a damage occurrence of a cantilever beam

This Chapter 13 presents a review of damage detection and structural health monitoring of mechanical systems from changes in the measurement of both linear and non-linear vibrations.

https://hal.archives-ouvertes.fr/hal-00779322/document

A review of damage detection and health monitoring of mechanical systems from changes in the measurement of linear and non-linear vibrations

Free-vibration behaviour of a cracked cantilever beam and crack detection

The method and apparatus are for safely cleaning live equipment. The method comprises the steps of heating a water-based solution by means of an apparatus to produce superheated steam; grounding this apparatus; conducting the superheated steam through an insulated conduct; and concentrating this superheated steam into a pressurized jet at an output of the insulated conduct. After the step of grounding the apparatus, the method further comprises the step of applying the pressurized jet through the insulated conduct output, onto the live equipment to be cleaned.

Yvon Turcotte

Papers

Free-vibration behaviour of a cracked cantilever beam and crack detection

Method and apparatus for safely cleaning a live equipment