Institutt for konstruksjonsteknikk
Nye registreringer
-
Tuned mass damper for self-excited vibration control: Optimization involving nonlinear aeroelastic effect
(Peer reviewed; Journal article, 2022)The conventional target for self-excited galloping/flutter control of a civil structure often focuses on the critical wind speed. In the present work, a nonlinear control target is introduced, i.e., to ensure that the ... -
Validation and Analysis on Numerical Response of Super-High-Speed Railway Pantograph-Catenary Interaction Based on Experimental Test
(Peer reviewed; Journal article, 2021)The numerical tools can be used to facilitate the design of the railway pantograph-catenary system. The validation of the current numerical results is mostly performed at a speed slower than 350 km/h. This paper aims at ... -
Assessment of the Current Collection Quality of Pantograph-Catenary with Contact Line Height Variability in Electric Railways
(Peer reviewed; Journal article, 2021)The numerical tools are widely used to facilitate the design of the railway catenary. Only radical results are obtained as the current assessment is generally performed without any practical errors. In this paper, the most ... -
Wind deflection analysis of railway catenary under crosswind based on nonlinear finite element model and wind tunnel test
(Peer reviewed; Journal article, 2022)This paper evaluates the railway catenary's wind deflection under crosswind based on wind tunnel experiments and a nonlinear finite element model. A catenary model is constructed based on the absolute nodal coordinate ... -
The Effects of Spatially Distributed Damping on the Contact Force in Railway Pantograph-Catenary Interactions
(Peer reviewed; Journal article, 2021)According to field measurements, the damping ratio of a railway catenary varies along the span length and shows an inherent uncertainty. In numerical simulations, it is common to assume a constant damping ratio. Herein, a ... -
Vibration Measurement and Wave Reflection Analysis in an Electrified Railway Catenary Based on Analytical Methods
(Peer reviewed; Journal article, 2021)The wave propagation property of the catenary directly affects the pantograph–catenary interaction performance. Specifically, wave reflection and transmission occurring at waveguide discontinuities, particularly at dropper ... -
Geometry deviation effects of railway catenaries on pantograph–catenary interaction: a case study in Norwegian Railway System
(Peer reviewed; Journal article, 2021)This paper presents a non-contact measurement of the realistic catenary geometry deviation in the Norwegian railway network through a laser rangefinder. The random geometry deviation is included in the catenary model to ... -
Laminar flow-induced vibration of a three-degree-of-freedom circular cylinder with an attached splitter plate
(Peer reviewed; Journal article, 2021)Splitter plates are widely used for drag reduction and vibration control or enhancement of circular cylinders. The effects of a splitter plate on the vertical flow-induced vibrations of a circular cylinder have been well ... -
Piezoelectric energy harvesting from vortex-induced vibration of a circular cylinder: Effect of Reynolds number
(Peer reviewed; Journal article, 2021)This study investigates the effects of the Reynolds number on the piezoelectric energy harvesting from vortex-induced vibrations (VIV) of a circular cylinder. The VIV-based piezoelectric energy harvester is simulated by a ... -
Closure Law Model Uncertainty Quantification
(Peer reviewed; Journal article, 2021)The prediction uncertainty in simulators for industrial processes is due to uncertainties in the input variables and uncertainties in specification of the models, in particular the closure laws. In this work, the uncertainty ... -
Effects of side ratio on energy harvesting from transverse galloping of a rectangular cylinder
(Peer reviewed; Journal article, 2021)Rectangular cylinders have been identified as ideal bluff bodies for galloping-based energy harvesting, while a systematic study of the effects of the side ratio (i.e., the ratio between the cylinder width and the cylinder ... -
Predefined angle of attack and corner shape effects on the effectiveness of square-shaped galloping energy harvesters
(Peer reviewed; Journal article, 2021)Energy harvesting based on transverse galloping of a square cylinder has been widely studied while the effects of angle of attack and corner shape remain unclear. This study proposes to explore the impacts of these two ... -
Numerical Simulation and Modelling Convention of Unsteady Fluidelastic Forces of Tube Arrays
(Peer reviewed; Journal article, 2021)This paper presents a numerical investigation on the unsteady fluidelastic forces of tube arrays. The key focus is on the consistency between the unsteady fluidelastic force model and the quasi-steady model for tube arrays ... -
An experimental study of beam-columns subjected to combined torsion, bending and axial actions
(Doktor ingeniøravhandling;1995:66, Doctoral thesis, 1995)This report presents an investigation on the inelastic behaviour of steel I-section beam-columns under combinations of axial load, bending and torsion. The study is motivated by the lack of information on the ultimate ... -
Exploring Surrogate Modeling as a Tool for Structural Assessment in Conceptual Design
(Master thesis, 2021)I nåtidens design-paradigme er det et klart skille mellom rollene til henholdsvis arkitekt og ingeniør. Dette skillet gjenspeiles i de digitale verktøyene som er tilgjengelig for de to disiplinene. Arkitektene har verktøy ... -
Exploring Surrogate Modeling as a Tool for Structural Assessment in Conceptual Design
(Master thesis, 2021)I nåtidens design-paradigme er det et klart skille mellom rollene til henholdsvis arkitekt og ingeniør. Dette skillet gjenspeiles i de digitale verktøyene som er tilgjengelig for de to disiplinene. Arkitektene har verktøy ... -
Optimization and Digital Fabrication of Material Effective Concrete Slabs
(Master thesis, 2021)I dag består forskaling vanligvis av kryssfiner-plater, noe som resulterer i enkle geometrier og dårlig materialutnyttelse. I teorien tillater betongens flytende egenskaper konstruksjoner i alle mulige former. Likevel blir ... -
Optimization and Digital Fabrication of Material Effective Concrete Slabs
(Master thesis, 2021)I dag består forskaling vanligvis av kryssfiner-plater, noe som resulterer i enkle geometrier og dårlig materialutnyttelse. I teorien tillater betongens flytende egenskaper konstruksjoner i alle mulige former. Likevel blir ... -
Parametric structural design of Catalan vaulting
(Master thesis, 2021)Denne masteroppgaven undersøker en parametrisk arbeidsflyt ved hjelp av parametriske verktøy for å modellere og analysere katalanske hvelv. Det er vel etablert at den katalanske hvelveteknikken har blitt brukt fra historien ... -
Integrated design and maintenance of deteriorating structural systems
(Doctoral theses at NTNU;2021:351, Doctoral thesis, 2021)Large structural systems such as bridges and offshore structures are subject to deterioration processes during their service life. Specifically, fatigue and corrosion are of major concern. To ensure that the structures are ...
RSS 2.0