Jonas Ringsberg
Jonas Ringsberg är proprefekt på institutionen för Mekanik och maritima vetenskaper och avdelningschef för Marin teknik på Chalmers. Han undervisar och är ansvarig för kurser i det internationella mastersprogrammet Naval Architecture and Ocean Engineering (MPNAV) på Chalmers, är examinator och handledare för flera doktorander och han bedriver samtidigt egen forskning.
FORSKNING
Huvudinriktningen på forskningen är inom forskningsområdena beräkningsmekanik med fokus på utmattning, materialmekanik och tillförlitlighetsanalys. Forskningen är bred och omfattar materialmekanik, utmattning (HCF, LCF, brottmekanik, fleraxlig utmattning, restspänningar och svetsar), finit elementmetod (olinjär, implicit och explicit), predikteringsmetoder för energieffektivisering av fartyg, vindassisterad framdrivning av fartyg, probabilistiska metoder och riskanalys, kompositmaterial, samt marina strukturer i arktisk miljö.
Forskningen bedrivs i huvudsak inom tillämpningsområdena kollision och grundstötning, lättviktskonstruktion, utmattning av marina strukturer, dynamisk respons, havsenergiutvinning, riskanalys och riskbedömning, marina strukturer i arktisk miljö, säkerhet, samt modellering och analys av fartygs energieffektivisering och transporteffektivitet. Jonas Ringsbergs forskning är intressant för och har kopplingar till Chalmers styrkeområden Energi, Materialvetenskap och Transport.
MEDLEMSKAP OCH ÅTAGANDEN SOM REDAKTÖR
Jonas Ringsberg är medlem i ”Lighthouse Programkommitté”, ”Nordisk Sjösäkerhetskommitté” och medlem i ”The Steering Committee of Marstruct Virtual Institute”. Jonas Ringsberg är också medlem i “The International Ship and Offshore Structures Committee (ISSC)” och har arbetat i flera tekniska kommittéer: Technical Committee III.2 (Fatigue and Fracture, medlem) under 2006 – 2012, Technical Committee II.1 (Quasi-static Response, ordförande) och Technical Committee III.1 (Ultimate Strength, medlem) sedan 2018. Han är medlem i ”The Society of Naval Architects and Marine Engineers (SNAME, Fellow)” och i “The Royal Institution of Naval Architects (RINA, Fellow)”.
Jonas Ringsberg är medlem i flera organisations- och vetenskapliga kommittéer till internationella konferenser som t ex ICSOS, MARSTRUCT, MARTECH, OMAE, RENEW och TRANSNAV. Han är biträdande redaktör i tidskrifterna ”ASME - Journal of Offshore Mechanics and Arctic Engineering” och ”Proc IMechE Part M: Journal of Engineering for the Maritime Environment”, medlem och aktiv i redaktörsgrupperna för tidskrifterna “Energies”, “Journal of Marine Science and Application”, “Marine Structures” samt “Ships and Offshore Structures”.
Visar 209 publikationer
Analysis of roll damping model scale data
A voyage planning tool for ships sailing between Europe and Asia via the Arctic
Prediction of roll motion using fully nonlinear potential flow and ikeda’s method
Analysis of roll damping model scale data
An Arctic ship performance model for sea routes in ice-infested waters
Concept design and performance evaluation of a fossil-free operated cargo ship with unlimited range
A comparison of two definitions of ship domain for analysing near ship–ship collisions
Ship resistance when operating in floating ice floes: a derivation of empirical equations
Load-carrying characteristics of foam core and joint geometry in sandwich structures
Decarbonizing maritime transport: A Ro-Pax case study
Analysis of roll damping model scale data
Concept design and performance evaluation of a fossil free operated cargo ship with unlimited range
Design, operation and analysis of wind-assisted cargo ships
A revisit of the definition of the ship domain based on AIS analysis
Models for design and fatigue analysis of dynamic power cables for wave energy converters
A methodology for design and fatigue analysis of power cables for wave energy converters
Weight optimization of an enclosed stressed skin derrick designed for Arctic regions
Analysis of interaction effects between WECs in four types of wave farms
ShipCLEAN – An integrated model for transport efficiency, economics and CO2 emissions in shipping
A 4 DOF simulation model developed for fuel consumption prediction of ships at sea
Making effective WEC design choices based on simulation and analysis
Influence of different wave load schematisation on global ship structural response
A voyage planning tool for Arctic transit of cargo ships
Effective use of composite marine structures: reducing weight and acquisition cost
A 4 DOF simulation model developed for fuel consumption prediction of ships at sea
Cost and weight of composite ship structures - a parametric study based on DNV rules
ISSC Technical Committee II.1 - Quasi-Static Response
Comparison of mooring solutions and array systems for point absorbing wave energy devices
Reduction in ultimate strength capacity of corroded ships involved in collision accidents
Influence of different wave load schematization on global ship structural response
Towards holistic performance-based conceptual design of Arctic cargo ships
Wind-assisted propulsion for shipping: status and perspectives
Shock analysis of a stern ramp using dynamic design analysis method
Analysis of impact loads on a self-elevating unit during jacking operation
A nonlinear viscoelastic iceberg material model and its numerical validation
Structural fire integrity testing of lightweight multiple core sandwich structures
A generic energy systems model for efficient ship design and operation
Reduction in ultimate strength capacity of corroded ships involved in collision accidents
Performance assessment of the crashworthiness of corroded ship hulls
Structural response analysis of slamming impact on free fall lifeboats
Estimation of damping from wave induced vibrations in ships
Structural analysis of node cut-outs in a semi-submersible offshore platform
Characterization of non-crimp fabric laminates: loss of accuracy due to strain measuring techniques
Quasi-static assessment of response to slamming impact on free fall lifeboats
Linear and nonlinear FE analyses of a container vessel in harsh sea state
Parametric study of the mechanical characteristics of power cables under dynamic motions
Steel or composite car deck structure – a comparison analysis of weight, strength and cost
Systems modelling for energy-efficient shipping
State-of-the-art within ship weather routing
ISSC Committee II.1 - Quasi-Static Response
Holistic ship energy systems modelling for efficient ship design and operation
An elastic–plastic ice material model for ship-iceberg collision simulations
Analysis of impact loads on a self-elevating unit during jacking operation
ISSC Committee III.2 - Fatigue and fracture
Crack growth analysis in ship structures using spectral methods
Fatigue failure analysis of fillet welded joints used in offshore structures
Development of a model for global response of ship hull during ramming of heavy ice features
Modelling approaches for reliability estimations of fibre-reinforced plastic laminates
Uncertainty in stress concentration factor computation for ship fatigue design
Ship security analysis – the effect of ship speed and effective lockout
Analysis of crack retardation effects and crack path in ship structure members on different routes
Quantitative risk analysis – Ship security analysis for effective risk control options
Assessment of the crashworthiness of a selection of innovative ship structures
A comparison of two wave models and their influence on fatigue damage in ship structures
Analysis of fatigue crack initiation and propagation in ship structures
Linear and nonlinear FE analyses of a container vessel in harsh sea state
Time-domain fatigue assessment of ship side-shell structures
Study on the possibility of increasing the maximum allowable stresses in fibre-reinforced plastics
Development and analysis of composite car deck structures
Effects of matrix cracking on the estimation of operational limits of FRP laminates
Theoretical development and validation of a fatigue model for ship routing
Fatigue variation in ships due to the variability of environmental loads
A parametric study of joint design in a HSLC composite vessel
What is the potential of using ship fatigue routing in terms of fatigue life extension?
Research, design, and operations
Probabilistic risk assessment for integrating survivability and safety measures on naval ships
Optimization of corrugated shell plating for marine structures
Direct calculation of fatigue damage of ship structure details
Optimization of composite maritime structures - effects of uncertainties on design criteria limits
Development of a fatigue model useful in ship routing design
A method for assessment of the survival time of a ship damaged by collision
Analysis of free vibration characteristics and mode shapes of a semi-submersible platform
A method for assessment of the survival time of a ship damaged by collision
Fatigue damage assessment of container ships concerning wave-induced torsion
Characteristics of material, ship side structure response and ship survivability in ship collisions
The effect of whipping/springing on fatigue damage and extreme response of ship structures
Development of a fatigue model useful in ship routing design
Comparison between a fatigue model for voyage planning and measurements of a container vessel
ISSC Committee III.2 - Fatigue and Fracture
A return period based plastic design approach for ice loaded side-shell/bow structures
Numerical analysis of nonlinear dynamic structural behaviour of ice-loaded side-shell structures
Experimental and numerical investigation of bulb impact with a ship side-shell structure
Holistic assessment of ship survivability and risk after damage
Assessment of uncertainties in life prediction of fatigue crack propagation in welded rails
Meeting a growing need for ship collision safety
Sheet metal fatigue near nuts welded to thin sheet structures
Numerical and experimental investigation of dynamics of vehicle/ship-deck interactions
Sheet metal fatigue near nuts welded to thin sheet structures in car bodies
Dynamics of vehicle-deck interactions
Contact Mechanics and Wear of Rail/Wheel Systems
Shear mode growth of short surface-breaking RCF cracks
Influence of railway wheel flat impact on crack growth in rails
Fatigue crack growth in welded rails
Fatigue crack growth in a welded rail under the influence of residual stresses
On propagation of short rolling contact fatigue cracks
Prevention of RCF damage in curved track through development of the INFRA-STAR two-material rail
Shear mode growth of short surface-breaking RCF cracks
Two-material rail for RCF and noise control
Researchers on the track of wheel-rail interaction
Modelling the behaviour of short crack propagation in rails
Modelling of rolling contact fatigue of rails
Shakedown limits in three-dimensional wheel-rail rolling-sliding contacts
Life prediction of rolling contact fatigue crack initiation
Finite element analyses of rolling contact fatigue crack initiation in railheads
A method for prediction of fatigue crack initiation in railway rails
Rolling Contact Fatigue of Railway Rails with Emphasis on Crack Initiation
Cyclic ratchetting and failure of a pearlitic rail steel
Prediction of fatigue crack initiation for rolling contact fatigue
On mechanical interaction between steel and coating in stressed and strained exposed locations
On mechanical interaction between steel and coating in welded structures
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Visar 47 forskningsprojekt
WINDSTRUC - vindassisterad framdrift för stora fartyg
Styrning av vågkraftverk utifrån vågmätningar, för optimal energiupptagning (WAVEMEASURE)
SHARC - utvärdering av riskerna för fartygs struktur och stabilitet vid kollision och grundstötning
Främjande av Chalmers forskning inom förnybar energi offshore
Utveckling av Chalmers forskning inom offshore förnybar energi
Utveckling av helt autonoma marina fartyg - ett steg mot ett autonomt Marine ElectriCity
WASP - Vindassisterad propulsion på fartyg
Elektrifiering av marin urbana transportsystem – Förstudie laddning
Strategiskt forskningsprojekt på Chalmers inom hydro- och aerodynamik
Energieffektiv maritim transport genom autonoma observationer av hav och is - EMTOI
Propeller-integrated motor drive for electric medium size boats
Förbättrad propellerprestanda för isgående fartyg
SEDNA - Safe maritime operations under extreme conditions: the Arctic case
ELASTMOOR - Elastiska förankringssystem för vågenergiomvandlare
Vindassisterad framdrivning av handelsfartyg
Samhällsekonomiska besparingar genom riskanalys för fartygskollisioner med transportinfrastruktur
Enhanced safety of ice-strengthened ship hulls in the Baltic Sea (pre-study ICEULTIMATE)
FoU av dynamiska lågspänningskablage mellan boj och flytande hubb i ett marint energisystem
Marine Traffic Model – tool for effective decision-making
Energieffektivare sjötransporter genom energisystemanalys av fartyg
Stokastiska modeller för vind- och våglaster
Experimentell provning av maximal bärförmåga hos en balkstruktur tillverkad av sandwichmaterial