Abstract. Melbourne Water Corporation's Western Treatment Plant, located in Werribee, Victoria, Australia, is pioneering the use of advanced technologies, including artificial intelligence, to enhance asset management practices. This particularly important for structural health monitoring (SHM) anaerobic lagoon floating covers, which are crucial biogas collection but can be compromised by scum accumulation underneath. study introduces a novel encoder-decoder network within convolutional...

Acoustic emission (AE) testing and Lamb wave inspection techniques have been widely used in non-destructive structural health monitoring. For thin plates, the AEs arising from defect development (e.g., fatigue crack propagation) propagate as waves, modes can be to provide important information about growth localisation of defects. However, few sensors achieve situ wavenumber–frequency modal decomposition AEs. This study explores ability a new multi-element piezoelectric sensor array...

The lack of a quantitative method to adequately assess fractured bone healing that has undergone fixation limits prognostic capabilities on patients' optimal return work. This paper addresses the use vibrational analysis monitor state plate-screw fixated femur and supplement current clinical radiographic assessment. experimental study involves an osteotomised composite specimen enclosed by modelling clay simulate damping effect overlying soft tissues. Epoxy adhesives are applied region...

Quantitative and reliable monitoring of osseointegration will help further evaluate the integrity orthopaedic construct to promote novel prosthesis design allow early mobilisation. assessment degree or lack is important for clinical management with introduction prosthetic implants amputees. Acousto-ultrasonic wave propagation has been used in structural health as well human but so far not extended osseointegrated prostheses. This paper presents an ultrasonic guided approach assess a implant....

High-density polyethylene (HDPE) is commonly the material of choice for covered anaerobic lagoons (CAL) at wastewater treatment plants. The membrane floats on wastewater, and hence called a “floating cover”, used odour control to harvest methane-rich biogas as renewable resource generate electricity. floating cover an expensive high-value asset that demands efficient methodology determination set engineering quantities structural integrity assessment. Given dynamics activities under cover,...

Reliable and quantitative assessments of bone quality fracture healing prompt well-optimised patient healthcare management earlier surgical intervention prior to complications nonunion malunion. This study presents a clinical investigation on modal frequencies associations with musculoskeletal components human legs by using prototype device based vibration analysis method. The findings indicated that the first out-of-plane coupled modes in frequency range from 60 110 Hz are associated femur...

Reliable and quantitative non-destructive evaluation for small fatigue cracks, in particular those hard-to-inspect locations, is a challenging problem. Guided waves are advantageous structural health monitoring due to their slow geometrical decay of amplitude with propagating distance, which ideal rapid wide-area inspection. This paper presents 3D laser vibrometry experimental finite element analysis the interaction between an edge-guided wave through-thickness hidden edge crack on...

The correlation between the nonlinear acousto-ultrasonic response and progressive accumulation of fatigue damage is investigated for an additively manufactured aluminum alloy AlSi7Mg compared with behavior a conventional wrought 6060-T5. A dual transducer wedge setup employed to excite 30-cycle Hann-windowed tone burst at center frequency 500 kHz in plate-like specimens that are 7.2 mm thick. This choice frequency-thickness designed symmetric Lamb mode s1, which, turn, generates...

The ability to evaluate the degree of healing a fractured bone is an integral part orthopaedic clinical care. conventional assessment techniques including X-ray and computed tomography are qualitative assessments, where their accuracy dependent on surgeon’s experience. Although there has been significant research devoted accurately define fracture healing, development more efficient diagnostic tools for accurate diagnosis non-unions still very subjective area. This article investigates...

Large structures and high-value assets require inspection integrity assessment methodologies that ensure maximum availability operational capabilities. membranes are used as floating covers at the anaerobic wastewater lagoons of Melbourne Water’s Western Treatment Plant (WTP). A critical function this asset pertains to harnessing biogas gas generated these well protecting environment from release odours greenhouse gases. Therefore, a proactive efficient management strategy required expensive...

This study aims to enhance diagnostic capabilities for optimising the performance of anaerobic sewage treatment lagoon at Melbourne Water’s Western Treatment Plant (WTP) through a novel machine learning (ML)-based monitoring strategy. strategy employs ML make accurate probabilistic predictions biogas by leveraging diverse real-life operational and inspection sensor other measurement data asset management, decision making, structural health (SHM). The paper commences with analysis...

Osseointegrated prostheses are widely used following transfemoral amputation. However, this technique requires sufficient implant stability before and during the rehabilitation period to mitigate risk of breakage loosening. Hence, reliable assessment methods for osseointegration process essential ensure initial long-term stability. This paper researches feasibility a vibration analysis (OI) by investigating change in dynamic response residual femur with novel design simulated OI process. The...

Reliable and quantitative detection of a small fatigue crack at hard-to-inspect locations remains challenging problem for structural health monitoring. A emanating from the blind side fuel weep hole constitutes representative example where traditional non-destructive methods fail, new approach is required. Recently Lamb-wave inspection has emerged as an attractive method due to their advantageous properties low geometrical decay rapid wide-area coverage. This paper presents computational...

It is shown that elastodynamic reciprocity provides a simpler approach for deriving the far-field displacements due to buried (sub-surface) sources in half-space, compared with integral transform techniques. The auxiliary fields employed this are associated reflection of plane waves three possible polarisations, and required far field can be expressed terms these well-known fields. crucial step evaluate surface involving cross-work between an outgoing spherical wavefront consisting incident...

Three-dimensional laser Doppler vibrometry is used to quantify the modal composition of guided plate waves generated by relaxor ferroelectric disk actuators a ⟨011⟩ poled Mn-Pb(Mg1/3Nb2/3)O-lead zirconate titanate (PZT) single crystal and ⟨100⟩ piezoelectric PZT, bonded an isotropic plate. Disk are excited using 5.5 cycle Hann-windowed voltage tone-burst at centre frequencies 100, 200, 300 kHz. Measured wave fields processed two-dimensional fast Fourier transform determine radiation pattern...

The current techniques in assessing the healing of a fixated fractured long bone, which include X-ray, computed tomography (CT), and manual manipulation, are qualitative its accuracy depends on surgeon's experience. A lack robust quantitative monitoring method bone limits survival orthopedic implants ability to accurately predict prevent fixation failure complications. This paper experimentally computationally investigates efficacy potential application vibration-based methodology....

Melbourne Water Corporation has two large anaerobic lagoons at the Western Treatment Plant (WTP), Werribee, Victoria, Australia. The are covered using numerous sheets of high-density polyethylene (HDPE) geomembranes to prevent emission odorous gases and harness biogas as a source renewable energy. Some content raw sewage can accumulate form into solid mass (called “scum”). development body scum that rises surface lagoon “scumbergs”) deforms covers may affect its structural integrity....

Abstract Floating covers are examples of a large membrane structure used at sewage treatment plants. At the Western Treatment Plant (WTP), Werribee, Melbourne, Australia, floating in anaerobic lagoons. They deployed to assist with raw beneath, harness methane-rich biogas generated, and for odor control. In this respect, these important assets harnessing sustainable renewable energy source, as well protecting environment from release damaging greenhouse plant. Given continuous nature...

A new acoustic sensing capability, consisting of a flexible high-density linear piezoelectric sensor array coupled to high-bandwidth interrogation device, is developed and applied in situ wavenumber–frequency modal decomposition emissions plates. An experimental assessment the capability undertaken using generated by ball-drop impact on aluminium composite panels. method for source localisation based this described, it shown be more accurate than conventional multilateration technique...

Abstract. Predictive models are important to help manage high-value assets and ensure optimal safe operations. Recently, advanced machine learning algorithms have been applied solve practical complex problems, of significant interest due their ability adaptively ‘learn’ in response changing environments. This paper reports on the data preparation strategies development predictive capability a Long Short-Term Memory recurrent neural network model for anaerobic reactors employed at Melbourne...

Unmanned aerial vehicle (UAV) assisted photogrammetry has been used to perform a non-contact measurement of the covers on anaerobic wastewater lagoons at Melbourne Water Corporation’s Western Treatment Plant (WTP). These floating are valuable assets that eliminate odour and greenhouse gas emissions harvest methane-rich biogas as renewable resource generate electricity. Hence, state deformation becomes an important engineering factor for structural integrity assessment. UAVs have deployed...

While acoustic emission (AE) testing can be used as a valuable technique in structural health monitoring and non-destructive testing, little research has been conducted to establish its sources, particularly 2024-T3 aluminium alloys. The major contribution of this work is that it provides method obtain better linear relationship count rate with crack growth based on waveform. This paper aims characterise AE sources by synchronising the waveforms load levels then propose possible dominant...

In various engineering applications, remote sensing images such as digital elevation models (DEMs) and orthomosaics provide a convenient means of generating 3D representations physical assets, enabling the discovery new insights analyses. However, presence noise artefacts, particularly unwanted natural features, poses significant challenges, their removal requires application filtering techniques prior to conducting analysis. Unmanned aerial vehicle-based photogrammetry is used at Melbourne...