Browsing Open Research by Author "Chung, H"
Now showing items 120 of 24

Attenuation of ocean waves due to random perturbations in the seabed profile
Chung, H (KiwiOz Waves Conferences (KOZ Waves), The University of Newcastle, 2014)We employ linear wave theory to study long range attenuation of ocean waves caused by small, random perturbations in the seabed. The phenomenon in an example of localization in random media. A multiplescale method is used, ... 
Bending waves in composite structures with random parameters
Chung, H (Institut für Mathematik, Universität Augsburg, 2012)Modelling the vibration of composite structures requires including the effects of uncertain material properties of individual components at midfrequency. A example here is a doubleleaf elastic plate, which is often used ... 
Computation of the surge motion of a floating elastic plate
Chung, H (AUT University, 2011)One difficulty with computing the surge of a floating elastic plate is that Green's function for the boundary value problem has singularities on the boundary and at the corners. This talk will show how to resolve the ... 
Computation of the transmission loss factor of single and double plates with random inhomogeneities
Chung, H (International Congress on Sound and Vibration (ICSV), 2013)The dynamics of thin elastic plates have been studied using various theoretical and experimental methods. In the context of acoustics, the primary interest is in the sound propagation from one side of the plate to the ... 
Detecting defects in composite beams and plates using Bayesian inference
Chung, H; Lee, J (KU Leuven  Department of Mechanical Engineering, 2014)The topic of this paper is an inverse problem of identifying defects in composite beams and plates. The physical representation of defects is parametrized. Assuming Gaussian errors in measurements, the Bayesian inference ... 
Distribution of vibrations of a doubleleaf plate with random inhomogeneities
Chung, H (2013)This paper shows how to compute vibrations of a doubleleaf plate with random inhomogeneities in its components, two plates and reinforcement beams. The modelling method is based on the variational principle for elastic ... 
Distribution of vibrations of a doubleleaf plate with random inhomogeneities
Chung, H (University of Southampton, 2013)This paper shows how to compute vibrations of a doubleleaf plate with random inhomogeneities in its components, two plates and reinforcement beams. The modelling method is based on the variational principle for elastic ... 
Flexural motion of a semiinfinite floating plate under localised edge loading
Chung, H (New Zealand Mathematical Society (nzmathsoc.org.nz), 2010)Numerical computation of ﬂexural motion of a ﬂoating elastic plate is often complicated. The linear approximation of the motion makes the computation tractable for simple harmonic waves in a plate. I will introduce a few ... 
Forest and Wood Products Australia Project PN04.2005: maximising impact sound resistance of timber framed floor/ceiling systems
Chung, H; Emms, G; Dodd, G; Schmid, G; McGunnigle, K (Forest & Wood Products Australia Limited (FWPA), 2007)This project further developed existing Australasian and overseas research to produce floor/ceiling systems for floors having acoustic properties which are comparable with concrete floor constructions, while also meeting ... 
Freebody and flexural motion of a floating elastic plate under wave maker forcing
Chung, H (ICIAM, 2011)One difficulty with computing the surge of a floating elastic plate is that Green's function for the boundary value problem has singularities at the corners of the boundary. This paper shows how to resolve the integrals ... 
Freebody and flexuralmotion of a floating elastic plate underwave maker forcing
Chung, H; Bennetts, L (The Pacific Institute for the Mathematical Sciences, 2011)A boundary integral equation (BIE) method is presented for the calculation of the motion of an elastic plate in a twodimensional setting. A wave maker is placed next to the plate and the model is therefore representative ... 
Including the irregularities in the lightweight floor/ceiling model
Chung, H; Fox, C (The Institute of the Noise Control Engineering of the USA, 2006)Chung and Fox previously presented a mathematical/computational model giving good prediction of lowfrequency vibration of lightweight timber based floor/ceiling structures (LTFS) made up of: upper plate, joist beams and ... 
Interaction between water waves and elastic plates: using the residue calculus technique
Chung, H; Linton, CM; Chung, H (WAMIT, 2003)This paper reports a new method of computing the coefficients of the modal expansion of the velocity potential for the socalled linear hydroelasticity problem. Two examples of the hydroelasticity problems are studied, ... 
Lack of diffuseness in wave propagation in lightweight joistfloor
Chung, H; Brunskog, J (Turkish Acoustical Society, 2007)It is common to assume the wave field to be diffuse in often used simplified calculation procedures in building acoustics, such as Statistical Energy Analysis (SEA) or energy flow methods. It is a well known that such ... 
Lightweight floor/ceiling systems with improved impact sound insulation
Chung, H; Fox, C; Dodd, G; Emms, G (The New Zealand Acoustical Society, 2010)Contrary to common belief, a relatively simple and practical lightweight timber based floor/ceiling can have impact sound insulation superior to that of concrete slab based systems. This paper presents examples of such ... 
Localisation in water wave and thin plate problems
Rupprecht, S; Peter, M; Bennetts, L; Chung, H (The International Workshop on Water Waves and Floating Bodies (IWWWFB), 2015)Simulations obtained for water waves over rough seabed and waves in rough in vacuo plate. Attenuation rates of effective and individual wave fields extracted, compared and found to differ. 
Modelling lowfrequency vibrations of lightweight timber floors
Chung, H (The New Zealand Acoustical Society, 2006) 
Modelling of light weight floor/ceiling structures
Chung, H (The Australian Acoustical Society. The New Zealand Acoustical Society., 2006)This talk presents a mathematical model of light weight timber floor/ceiling structures. The structures studied here consist of three basic components, upper plate, joist beams and ceiling. The shape of the whole structure ... 
Simulating vibrations of a doubleleaf plate with uncertainties in material properties and interaction between components
Chung, H (International Congress on Vibration and Sound (ICVS), 2012)Modelling the vibration of composite structures requires including the effects of uncertain material properties of individual components at midfrequency. The purpose of this model is to predict the vibration of doubleleaf ... 
Transition conditions at the interface between floating plates
Chung, H; Fox, C (The International Workshop on Water Waves and Floating Bodies (IWWWFB), 2005)This paper presents studies of wave propagation across a crack in an ice sheet. We consider a crack between two ice sheets that are infinitely stretching to either side. The theoretical model of the ice sheet assumes that ...