Design And Simulation Of Guided Wave Transmitter For Inspection On Concrete Plate

Saafuan Ali, Tukiran (2015) Design And Simulation Of Guided Wave Transmitter For Inspection On Concrete Plate. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Non – Destructive Testing (NDT) is the best method to do inspection on critical and inaccessible surface or condition. Guided wave testing is the latest NDT method that offers great opportunity on inspection over large area in Structural Health Monitoring (SHM). It allows inspection of underground structures like pipes and piles as well as walls and beams on skyscrapers. The large coverage on the inspection offers effective method to perform an inspection and monitoring on concrete structures in shorter time inspection which greatly will reduce the total cost of the maintenance. Lamb wave is very well known in inspection of plate-like metal structures such as oil storage tank, pressure vessel, and air plane structures. However, there are very limited studies on the wave propagation in the concrete structures. This required to run a simulation of the guided wave propagation to understand the wave propagation from the computed result. There are two types of Lamb wave mode that important to understand which are symmetrical modes (S-mode) and antisymmetrical modes (A-mode). Lamb wave velocities related to thickness of the plate and demonstrate dispersive characteristic. Fundamental understanding of guided wave propagation and the wave modes are compulsory for a defect on concrete can be identified at specific location. Four types of concrete plates with singular defect have been modelled in ABAQUS software to understand the behaviour of wave propagation. In addition, two experiments have been conducted for in-plane and out-of-plane vibration analyse. In the conclusion, the experimental and simulation result shows that S0 mode and A0 mode is possible to be excited on the concrete plate.

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