ORCID Profile
0000-0001-9537-2744
Current Organisation
University of Tasmania
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Maritime Engineering | Aerodynamics | Ship And Platform Hydrodynamics | Ship And Platform Structures | Applied Statistics | Ship and Platform Structures | Autonomous Vehicles
Navy | International sea transport | Nautical equipment | Passenger Water Transport |
Publisher: Elsevier BV
Date: 12-2014
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier BV
Date: 02-2017
Publisher: Elsevier BV
Date: 2008
Publisher: Elsevier BV
Date: 09-2014
Publisher: Elsevier BV
Date: 03-2015
Publisher: Elsevier BV
Date: 12-2022
Publisher: Elsevier BV
Date: 11-2014
Publisher: SAGE Publications
Date: 11-2015
DOI: 10.1260/1369-4332.18.11.1807
Abstract: Steel tubular sections are extensively found in many kinds of civil and mechanical engineering structures such as columns and bracing elements, offshore industry, bridge elements, etc. Due to the extensive usage, a considerable amount of research has been carried out on such structural members. Although many studies focused on the bending stability of steel members, very little research can be found on the effect of surface defects, such as dent imperfection, on the bending behavior of such tubular members. This research aimed to evaluate the effect of dent-shaped defects on the flexural capacity of CHS members. The data obtained in this paper can be applied to evaluate the capacity of large scale CHS members with similar D/t ratio when a dent is formed on the tubes during the service life of such members. An interrelation between the capacity and the details of the dent, i.e. size and position of the dent, was proposed.
Publisher: Springer Science and Business Media LLC
Date: 15-03-2016
Publisher: SAGE Publications
Date: 21-05-2019
Abstract: This paper demonstrates the feasibility of simultaneously identifying both the location and severity of structural damage in a beam by using two independent moving load experiments. First, a simple but sufficiently accurate single degree of freedom model is presented to simulate the structure efficiently over a wide range of relevant inputs. We then introduce a damage sensitive feature (DSF) based on the integral of the velocity time history of the beam at its midspan when the load moves over the beam. A critical velocity, a function only of the beam’s first natural frequency and length, is obtained for the proposed DSF, upon which the damage can be located more accurately. The only required data for the damage detection is the midspan velocity-time history of the cracked beam subjected to a moving load, and the midspan static deflection of the intact beam subjected to a load of the same magnitude. In the last section of this paper, the capability of the proposed DSF is examined in the presence of noise. The results demonstrate the capability of the proposed method to find both the damage location and severity successfully, and methods for further reducing the effects of noise are suggested.
Publisher: Informa UK Limited
Date: 10-09-2018
Publisher: Elsevier BV
Date: 2006
Publisher: Elsevier BV
Date: 07-2015
Publisher: Informa UK Limited
Date: 03-04-2019
Publisher: Elsevier BV
Date: 04-2019
Publisher: MDPI AG
Date: 13-06-2022
Abstract: Plantation-grown Eucalyptus nitens (E. nitens) has been grown predominantly for the pulp and paper industry. In this study, the suitability of E. nitens as a structural material is examined using static tensile tests in a universal testing machine. The anisotropic tensile behaviour of 240 Eucalyptus nitens small clear wood s les with a ersity of grain angles was examined in both dry and wet conditions. The s les had a highly anisotropic tensile characterisation in the context of both a low moisture content (MC = 12%) and a high moisture content (MC its fibre saturation point, FSP). The results showed that, in a high moisture content condition, the wood showed a lower failure strength and more ductility at all grain angles than in a low moisture content condition. The underlying failure mechanism of Eucalyptusnitens timber in tension was determined in detail from the perspective of the microstructure of wood cellulose polymer composites. The mean tensile failure strengths perpendicular and parallel to the fibre direction were, respectively, 5.6 and 91.6 MPa for the low MC and 3.8 and 62.1 MPa for the high MC condition. This research provides a basis for using E. nitens as a potential structural tensile member. The moisture modification factors of Eucalyptus timber at a mean level are higher than those of the traditional construction material, Pinus radiata, implying that E. nitens is promising as a material to be used for tensile members in water saturated conditions.
Publisher: Elsevier BV
Date: 12-2019
Publisher: Royal Institution of Naval Architects
Date: 2003
Publisher: The Society of Naval Architects and Marine Engineers
Date: 20-11-190728635
Publisher: Acoustical Society of America (ASA)
Date: 04-2017
DOI: 10.1121/1.4979119
Abstract: Early reflections are known to be important to musicians performing on stage, but acoustic measurements are usually made on empty stages. This work investigates how a chamber orchestra setup on stage affects early reflections from the stage enclosure. A boundary element method (BEM) model of a chamber orchestra is validated against full scale measurements with seated and standing subjects in an anechoic chamber and against auditorium measurements, demonstrating that the BEM simulation gives realistic results. Using the validated BEM model, an investigation of how a chamber orchestra attenuates and scatters both the direct sound and the first-order reflections is presented for two different sized “shoe-box” stage enclosures. The first-order reflections from the stage are investigated in idually: at and above the 250 Hz band, horizontal reflections from stage walls are attenuated to varying degrees, while the ceiling reflection is relatively unaffected. Considering the overall effect of the chamber orchestra on the direct sound and first-order reflections, differences of 2–5 dB occur in the 1000 Hz octave band when the ceiling reflection is excluded (slightly reduced when including the unobstructed ceiling reflection). A tilted side wall case showed the orchestra has a reduced effect with a small elevation of the lateral reflections.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2017
Publisher: Springer Science and Business Media LLC
Date: 30-01-2017
Publisher: Informa UK Limited
Date: 29-12-2021
Publisher: SPIE
Date: 04-2019
DOI: 10.1117/12.2514270
Publisher: Elsevier BV
Date: 02-2015
Publisher: Springer Science and Business Media LLC
Date: 31-10-2019
Publisher: Elsevier BV
Date: 09-2015
Publisher: Elsevier BV
Date: 07-2015
Publisher: Springer Science and Business Media LLC
Date: 16-06-2020
Publisher: Informa UK Limited
Date: 2006
Publisher: Informa UK Limited
Date: 30-10-2015
Publisher: Informa UK Limited
Date: 2006
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 07-2019
Publisher: Hindawi Limited
Date: 23-10-2022
DOI: 10.1002/STC.2867
Publisher: Elsevier BV
Date: 11-2003
Publisher: Informa UK Limited
Date: 2007
Publisher: Springer Science and Business Media LLC
Date: 03-2015
Publisher: Elsevier BV
Date: 2021
Publisher: Elsevier BV
Date: 11-2004
Publisher: Informa UK Limited
Date: 2007
Publisher: Elsevier BV
Date: 10-2015
Publisher: SAGE Publications
Date: 02-2018
Abstract: The effects of tunnel height and centre bow length on the motions of a 112-m wave-piercer catamaran with an above-water centre bow were investigated through model tests. Five alternative centre bow configurations were considered, and multiple series of model tests were conducted in regular head sea waves. The results showed that both heave and pitch increased over a wide range of wave encounter frequency as the wet-deck height of the catamaran model increased. However, increasing the length of the centre bow showed an increase in the pitch but a decrease in the heave for a limited range of wave encounter frequency near the heave and pitch resonance frequencies of the catamaran model. The positions of minimum vertical displacement were found to be aft of the longitudinal centre of gravity, between 20% and 38% of the overall length from the transom. Increase in the wet-deck height and consequently the archway clearance between the main hulls and centre bow also resulted in an increase in the vertical displacement relative to the undisturbed water surface in the centre bow area. The results also indicated the vulnerability to wet-deck slamming for the different bow and wet-deck designs.
Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier BV
Date: 10-2013
Publisher: Informa UK Limited
Date: 02-09-2015
Publisher: Acoustical Society of America (ASA)
Date: 06-2019
DOI: 10.1121/1.5111748
Abstract: Characterizing stage acoustics using objective parameters has seen some recent resurgence—several studies have noted the importance of the directionality of early stage reflections to musicians, which is not adequately represented using existing omnidirectional stage-support parameters. This study examines the subjective impressions of 19 chamber musicians against omnidirectional [reverberation time, early and late support (STEarly, STLate), etc.], and proposed spatially-defined parameters (TH and TS), along with simple ratios of stage dimensions derived from measurements on eight purpose-built stages. TH is a ratio of early energy from “above” to that from the “horizontal,” while TS relates energy from above to that from the “sides” of the stage. Robust mixed-effects analyses showed that the musicians' overall acoustic impression ratings are predicted (i) by TH within a linear model (ii) by TH × STEarly, TH × STLate, and TS × STEarly, TS × STLate (iii) by STEarly, STLate each within parabolic models and (iv) by several architectural parameters' linear and parabolic models. These findings reinforce recent studies of spatially-defined parameters to more fully account for the subtleties of onstage sound fields. Some simple design recommendations are presented, although future studies are needed to confirm these findings/recommendations for a wider range of auditorium stages.
Publisher: The Society of Naval Architects and Marine Engineers
Date: 03-2017
Publisher: The Society of Naval Architects and Marine Engineers
Date: 09-2018
DOI: 10.5957/JOSR.180001
Abstract: Centre bow (CB) design for wave-piercing catamarans (WPCs) is a critical compromise between minimization of slamming and protection against deck ing. To inform the design process, this article investigates the slam loads and kinematics during bow entry events in regular head seas for a 112-m WPC with systematic variations to its CB and wet-deck geometry. Model tests using a 2.5-m hydroelastic segmented catamaran considered five different CB configurations, designated as the parent, high, low, long, and short CB. The results indicated that changes in the CB length had little effect on the general kinematic trends obtained for the pitch, heave, and bow vertical displacement at the instant of slamming, but increasing the wet-deck height resulted in an increase in heave (but not pitch) at slamming. Two new design ratios are proposed. The CB immersion depth to arch height ratio showed slamming occurring in the range of 0.3–0.6 depending on the wave encounter frequency and the CB configuration. The CB buoyancy in the encountered waves was estimated by considering both immersion depth and area along the CB in waves through relative motion analyses. It was found that the buoyancy to slam force ratio increased with increasing wet-deck height but not with increasing CB length. This suggests that an optimal CB configuration could be achieved by first modifying the arched cross-structure to reduce the arch filling effect on slamming severity and then maximizing the CB buoyancy to slam force ratio by increasing either the wet-deck height or the CB length. An above-water centre bow (CB) for improving seakeeping is a feature of modern wave-piercing catamarans (WPCs) (Soars 1993 Boulton 1998 Fang & Chan 2007 Dubrovsky 2014). Figure 1 shows a 112-m Incat WPC with the CB located between the two demihulls. There are several important factors to be considered when designing such a central bow. First, the reserve buoyancy offered by the CB is the primary design factor for providing a pitchrestoring moment and eliminating deck ing in the following waves (Davis & Whelan 2007). Second, the CB configuration can influence the slamming loads in WPCs during bow entry in waves (Lavroff et al. 2013). This is due to the complex fluid-structure interaction in the CB area. When the CB enters waves, the water gradually fills the spaces between the CB and demihulls, referred to here as archways, and may result in complete closure of the archways and slamming in excessive pitch conditions. Finally, the frequency of slamming occurrence is, to some extent, related to the CB design as it contributes to lateral jet flow during the CB entry. As a result, slamming may occur in even partial water entrapment below the arch wet-deck cross-structure, which could be the case in small pitch motions (Lavroff & Davis 2015).
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2017
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 12-2018
Publisher: American Society of Civil Engineers (ASCE)
Date: 02-2016
Publisher: CRC Press
Date: 12-12-2022
Start Date: 12-2008
End Date: 12-2013
Amount: $290,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2019
End Date: 01-2023
Amount: $460,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 05-2006
End Date: 12-2008
Amount: $356,528.00
Funder: Australian Research Council
View Funded Activity