Optimization of non-periodic inspection of structural components by Bayesian approach

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Optimization of non-periodic inspection of structural components by Bayesian approach by Mind Map: Optimization of non-periodic inspection of structural components by Bayesian approach

1. There is demand for performing maintenance of aging infrastructure more efficiently and effectively in many industries.

1.1. For safety-critical infrastructure such as nuclear power plants, aircraft structural components, and aircraft turbine engines, the optimization of inspections with respect to cost and reliability is desired.

2. Bayesian approaches have been introduced by Fujimoto et al. (1989) and Deodatis et al. (1992) to determine the appropriate non-periodic inspection intervals for multiple component fatigue-sensitive structures so that, throughout the service life, the reliability remains above a predefined minimum level.

2.1. The method introduced by Ito et al. (1992) focuses on aircraft structures and makes use of the appropriate equations for a law of crack propagation, the probability of crack detection and the failure rate after crack initiation.

3. A method for determining the appropriate non-periodic inspection intervals of aircraft structures and estimating the value of uncertain parameters was improved by using conditional probabilities for the Bayesian estimation. Only the information about the last replacement or repair of a component is now required, instead of all the inspection information from start-up.

4. There is a demand to perform the maintenance of the old infrastructure more efficiently and effectively in many industries, every nuclear power plant undergoes a maintenance program to ensure the good condition of the equipment.

4.1. The maintenance has the character of repairing the failures that may have arisen during the operation of the installation and also has a preventive nature, which consists of carrying out systematic reviews and periodic tests, so that failures do not occur that can be avoided by maintenance, and to verify that the equipment remains in proper operating conditions.