A5010704363- Acoustic Wave Phenomena Research
- Structural Health Monitoring Techniques
- Cellular and Composite Structures
- Numerical methods in engineering
- Composite Structure Analysis and Optimization
- Vehicle Noise and Vibration Control
- Composite Material Mechanics
- Ultrasonics and Acoustic Wave Propagation
- Vibration and Dynamic Analysis
- Wind and Air Flow Studies
- Seismic Imaging and Inversion Techniques
- Aerodynamics and Acoustics in Jet Flows
- Asphalt Pavement Performance Evaluation
- Noise Effects and Management
- Topology Optimization in Engineering
- Material Properties and Processing
- Hydraulic Fracturing and Reservoir Analysis
- Electromagnetic Simulation and Numerical Methods
- Probabilistic and Robust Engineering Design
- Railway Engineering and Dynamics
- Underwater Acoustics Research
- Optical measurement and interference techniques
- Structural Analysis and Optimization
- Engineering Applied Research
- Innovations in Concrete and Construction Materials
KTH Royal Institute of Technology
2015-2024
Helsingborgs lasarett
2016
Wallenberg Wood Science Center
2007-2013
Jernkontoret (Sweden)
2008
Clinical Laserthermia Systems (Sweden)
2005
National Aeronautical Research Institute
1987-1998
Engineering Acoustics (United States)
1998
Sweden stands out among the other European countries by degree of restrictive measures taken towards handling 2019 coronavirus outbreak, associated with CoViD-19 pandemic. While several governments have imposed a nationwide total or partial lockdown in order to slow down spread virus, Swedish government has opted for recommendation-based approach together few restrictions. In present contribution, impact this strategy will be observed through monitored variation city noise levels during...
Abstract The understanding of the depletion species and communities recovery following reduction pressures is fundamental in conservation biology. impact bottom trawl fisheries on benthic has been well studied, but there are few studies long‐term after cessation trawling. Here we followed macrofaunal community over 12 years a large (426 km 2 ) no‐take zone (NTZ) area south Kattegat demersal trawling was stopped compared it to nearby where continued. Using multivariate analyses, found shifts...
Metamaterials, man-made composites that are scaled smaller than the wavelength, have demonstrated a huge potential for application in acoustics, allowing production of sub-wavelength acoustic absorbers, invisibility, perfect mirrors and lenses hyper focusing, illusions enabling new degrees freedom control field. The zero, or even negative, refractive sound index metamaterials offers possibilities patterns at scales. Despite tremendous growth research on during last decade, metamaterial-based...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 586:41-55 (2018) - DOI: https://doi.org/10.3354/meps12434 Effects of chronic bottom trawling on soft-seafloor macrofauna in Kattegat Mattias Sköld1,*, Peter Göransson2, Patrik Jonsson1, Francois Bastardie3, Mats Blomqvist4, Stefan Agrenius5, Jan Geert Hiddink6, Hans C. Nilsson1, Valerio Bartolino1 1Department...
Despite the increasing availability of tools and methods for sustainable circular product design (DfS), their uptake in practice is slow. This also true automotive industry, where DfS an important measure addressing industry's negative environmental social impacts. To facilitate implementation, this paper uses analytic hierarchy process (AHP) offers, first time, a classification prioritisation barriers that need to be overcome when implementing into vehicle development processes. Based on...
A porous solid may be characterized as an elastic-viscoelastic and acoustic-viscoacoustic medium. For a flexible, open cell foam, the transport of energy is carried both through sound pressure waves propagating fluid in pores, elastic stress frame material. given situation, balance between dissipated vibration frame, changes acoustic coupling varies with topological arrangement, choice material properties, interfacial conditions, etc. Engineering foams, i.e. designs built on systematic...
Abstract In this paper a fully anisotropic symmetric weak formulation of Biot's equations for vibro‐acoustic modelling porous elastic materials in the frequency domain is proposed. Starting from their form, mixed displacement–pressure discussed terms Cartesian tensors. The equation parameters appearing differential are derived material which possible to determine through experimental testing or micro‐structural simulations fluid and skeleton. Solutions obtained by applying finite element...
To enable the consideration of life cycle environmental impacts in early stages vehicle design, a methodology using proxy energy is proposed this paper. The trade-offs between production, operational performance and end-of-life are formulated as mathematical problem, simultaneously balanced with other transport-related functionalities, may be optimised. illustrated through an example design study, which deliberately kept simple order to emphasise conceptual idea. obtained optimisation...
A weak solution of the coupled, acoustic-elastic, wave propagation problem for a flexible porous material is proposed 3-D continuum. Symmetry in matrix equations; with respect to both volume, i.e. ‘porous frame’–‘pore fluid’, and surface, frame/pore fluid’–‘non-porous media’, fluid–structure interaction; ensured only five unknowns per node; fluid pore pressure, fluid-displacement potential three Cartesian components frame displacement field. Taking Biot's general theory as starting point,...
This article deals with the design and weight optimization of a multi-functional vehicle body panel in an automotive context. An existing has provided functional requirements regarding static, dynamic, acoustic behavior components car roof. A novel, multifunctional is proposed which integrates component present traditional roof system within single module. The properties two configurations novel are examined using numerical methods including advanced poro-elastic modeling tools compatible...
This paper proposes an inverse estimation method for the characterisation of elastic and anelastic properties frame anisotropic open-cell foams used sound absorption. A model viscoelasticity based on a fractional differential constitutive equation is used, leading to augmented Hooke's law in frequency domain, where phenomena appear as distinctive terms stiffness matrix. The parameters are nine orthotropic moduli, three angles orientation material principal directions governing dependence....
Structural-acoustic finite element models including three-dimensional (3D) modeling of porous media are generally computationally costly. While being the most commonly used predictive tool in context noise reduction applications, efficient solution strategies required. In this work, an original modal technique, involving real-valued modes computed from a classical eigenvalue solver is proposed to reduce size problem associated with media. form presented contribution, method suited for...