Browsing NTNU Open by Author "Nåvik, Petter Juell"
Now showing items 1-17 of 17
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Assessment of pantograph-catenary interaction in a railway overlap section via a novel optical-based method
Jiang, Tengjiao; Frøseth, Gunnstein Thomas; Nåvik, Petter Juell; Rønnquist, Anders (Peer reviewed; Journal article, 2022)Smooth pantograph-catenary contact is essential for regular train operation. However, catenary section overlaps are locations where peak contact forces occur, which significantly affects current collection quality. This ... -
Assessment of the High-frequency Response in Railway Pantograph-Catenary Interaction Based on Numerical Simulation
Song, Yang; Rønnquist, Anders; Nåvik, Petter Juell (Peer reviewed; Journal article, 2020)The numerical model is a well-acknowledged tool to evaluate railway pantograph-catenary interaction performance. The current standard restricts most current simulation tools by a cut-off frequency of 20 Hz. This low-frequency ... -
Contact point lateral speed effects on contact strip wear in pantograph – catenary interaction for railway operations under 15 kV 16.67 Hz AC systems
Derosa, Stefano; Nåvik, Petter Juell; Collina, Andrea; Bucca, Giuseppe; Rønnquist, Anders (Peer reviewed; Journal article, 2021)The design of a railway catenary is subject to multiple decisions regarding the geometry of the system. In particular, the horizontal geometry of the contact wire determines the evolution of the wear of the contact wire ... -
Contact Wire Irregularity Stochastics and Effect on High-speed Railway Pantograph-Catenary Interactions
Song, Yang; Liu, Zhigang; Rønnquist, Anders; Nåvik, Petter Juell; Liu, Zhendong (Peer reviewed; Journal article, 2020)In high-speed rail operations, contact wire irregularity (CWI) in a catenary is a common disturbance to the pantograph-catenary interaction performance, which directly affects the quality of current collection. To describe ... -
Development of an index for quantification of structural dynamic response in a railway catenary section
Nåvik, Petter Juell; Derosa, Stefano; Rønnquist, Anders (Peer reviewed; Journal article, 2020)In an attempt to quantify the amount of the dynamic reaction in a railway catenary system due to the dynamic action created by the interaction with the pantograph of the train, a catenary dynamic index (CDI) is developed. ... -
Dynamic properties of Stress-laminated Timber Bridges
Johansen, Sigve Ostad; Martinsen, Lavina Kristine (Master thesis, 2021) -
The Effects of Spatially Distributed Damping on the Contact Force in Railway Pantograph-Catenary Interactions
Song, Yang; Jiang, Tengjiao; Rønnquist, Anders; Nåvik, Petter Juell; Frøseth, Gunnstein Thomas (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 ... -
Estimating and Predicting Dynamic Properties of Stress-laminated Timber Bridges
Kastet, Anders; Alnaser, Ahmad Adnan (Master thesis, 2022)Populariteten til tverrspente limtrebuer har økt den siste tiden grunnet rask byggetid og god tilpasningsevne. Treverk er betraktet som et karbonnøytralt byggemateriale og dermed ansett som et sentralt byggemateriale for ... -
Estimating and Predicting Dynamic Properties of Stress-laminated Timber Bridges
Alnaser, Ahmad Adnan; Kastet, Anders (Master thesis, 2022)Populariteten til tverrspente limtrebuer har økt den siste tiden grunnet rask byggetid og god tilpasningsevne. Treverk er betraktet som et karbonnøytralt byggemateriale og dermed ansett som et sentralt byggemateriale for ... -
Geometry deviation effects of railway catenaries on pantograph–catenary interaction: a case study in Norwegian Railway System
Song, Yang; Jiang, Tengjiao; Nåvik, Petter Juell; Rønnquist, Anders (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 ... -
A heuristic wear model for the contact strip and contact wire in pantograph – Catenary interaction for railway operations under 15 kV 16.67 Hz AC systems
Derosa, Stefano; Nåvik, Petter Juell; Collina, Andrea; Bucca, Giuseppe; Rønnquist, Anders (Peer reviewed; Journal article, 2020)The sliding contact between the pantograph and catenary allows the correct operation of electric trains. However, this contact induces wear on both the components involved in the process, namely the contact strip on the ... -
Identification of short-wavelength contact wire irregularities in electrified railway pantograph–catenary system
Song, Yang; Rønnquist, Anders; Jiang, Tengjiao; Nåvik, Petter Juell (Peer reviewed; Journal article, 2021)The effect of two common types of short-wavelength irregularities (local imperfections and periodic short-wavelength irregularities) of the railway catenary on the pantograph–catenary interaction performance are studied ... -
On the use of experimental modal analysis for system identification of a railway pantograph
Nåvik, Petter Juell; Derosa, Stefano; Rønnquist, Anders (Peer reviewed; Journal article, 2020)This study investigates the use of experimental modal analysis to identify the modal properties of a railway pantograph system, including component behaviour within the system, for an extended frequency range in three main ... -
Operational Displacement Estimations of Railway Catenary Systems by Photogrammetry and the Integration of Acceleration Time Series
Frøseth, Gunnstein Thomas; Nåvik, Petter Juell; Rønnquist, Anders (Journal article, 2020) -
Railway catenary tension force monitoring via the analysis of wave propagation in cables
Derosa, Stefano; Nåvik, Petter Juell; Collina, Andrea; Rønnquist, Anders (Peer reviewed; Journal article, 2020)The tensioning forces applied to the contact wire in a railway catenary system influence the performance of the line. In this paper, a method to monitor the status of such tensioning forces is proposed based on the dependency ... -
Vertical vs. Lateral Dynamic Behaviour of Soft Catenaries subject to Regular Loading using Field Measurements
Rønnquist, Anders; Nåvik, Petter Juell (Journal article, 2020)During the last couple of decades, there has been a steady increase in the development of higher-speed railways. Higher speeds increase the demands on existing railway infrastructure designed for older and different ... -
Vibration Response of Footbridges under Pedestrian Loading: A Review and Analysis of Guidelines and Numerical Models
Baldishol, Espen; Eknes, Martine Torsvik (Master thesis, 2024)Svingninger forårsaket av fotgjengere på gangbruer blir stadig viktigere å ta med i betraktning under dimensjoneringsfasen. Ambisiøse arkitekter og økende fokus på miljøhensyn driver moderne gangbrudesign mot å bli slankere ...