Browsing NTNU Open by Author "Rønnquist, Anders"
Now showing items 1-20 of 59
-
An enhanced forced vibration rig for wind tunnel testing of bridge deck section models in arbitrary motion
Siedziako, Bartosz; Øiseth, Ole; Rønnquist, Anders (Journal article, 2017)This paper presents a new experimental setup for the aerodynamic section model testing of bridge decks. The rig is designed to move a section model in arbitrary motion in a wind tunnel to imitate the motions of such scaled ... -
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 ... -
Automatic Mesh Generation for Finite Element Analysis in Algorithms-Aided Design
Kalleberg, Silje Knutsvik; Kunnas, Magnus; Nedland, Hilde Iden (Master thesis, 2021)I denne masteroppgaven utforskes automatisering av mesh-generering for FE-analyser. Dette gjøres i sammenheng med Algorithms-Aided Design, en designtilnærming der modeller er representert med algoritmer og parametere. ... -
Automatic Mesh Generation for Finite Element Analysis in Algorithms-Aided Design
Kalleberg, Silje Knutsvik; Kunnas, Magnus; Nedland, Hilde Iden (Master thesis, 2021)I denne masteroppgaven utforskes automatisering av mesh-generering for FE-analyser. Dette gjøres i sammenheng med Algorithms-Aided Design, en designtilnærming der modeller er representert med algoritmer og parametere. ... -
Automatic Mesh Generation for Finite Element Analysis in Algorithms-Aided Design
Kalleberg, Silje Knutsvik; Kunnas, Magnus; Nedland, Hilde Iden (Master thesis, 2021)I denne masteroppgaven utforskes automatisering av mesh-generering for FE-analyser. Dette gjøres i sammenheng med Algorithms-Aided Design, en designtilnærming der modeller er representert med algoritmer og parametere. ... -
Conceptual form-finding in structural engineering
Luczkowski, Marcin (Doctoral theses at NTNU;2020:232, Doctoral thesis, 2020)The building industry is a growing industry, and it is expected to be expanding further in the near future. In the design, production and construction of new projects, the conceptual design is clearly the most creative ... -
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 ... -
Covariance-driven stochastic subspace identification of an end-supported pontoon bridge under varying environmental conditions
Kvåle, Knut Andreas; Øiseth, Ole; Rønnquist, Anders (Journal article, 2017)The Bergsøysund Bridge is currently being extensively monitored with accelerometers, anemometers, wave radars and GNSS sensors. By applying Covariance-driven Stochastic Subspace Identification (Cov-SSI), the modal parameters ... -
Damage Detection Applied to a Full-Scale Steel Bridge Using Temporal Momens
Svendsen, Bjørn Thomas; Frøseth, Gunnstein Thomas; Rønnquist, Anders (Peer reviewed; Journal article, 2020)The most common damages in existing highway and railway steel bridges are related to fatigue and are, as reported in the literature, found in the structural system of the bridge deck. This paper proposes a methodology for ... -
Damping in Timber Structures
Labonnote, Nathalie (Doctoral Theses at NTNU, 1503-8181; 2012:263, Doctoral thesis, 2012)Key point to development of environmentally friendly timber structures, appropriate to urban ways of living, is the development of high-rise timber buildings. Comfort properties are nowadays one of the main limitations to ... -
A data-based structural health monitoring approach for damage detection in steel bridges using experimental data
Svendsen, Bjørn Thomas; Frøseth, Gunnstein Thomas; Øiseth, Ole Andre; Rønnquist, Anders (Journal article; Peer reviewed, 2022)There is a need for reliable structural health monitoring (SHM) systems that can detect local and global structural damage in existing steel bridges. In this paper, a data-based SHM approach for damage detection in steel ... -
Dataset for long-term wind and acceleration monitoring of the Hardanger Bridge
Fenerci, Aksel; Kvåle, Knut Andreas; Petersen, Øyvind Wiig; Rønnquist, Anders; Øiseth, Ole Andre (Peer reviewed; Journal article, 2021)A large data set of wind and acceleration data collected through long-term monitoring of the Hardanger Bridge in Norway is described in this data paper. The data set includes both raw data and organized data, and it is ... -
Design & Evaluation of Discrete Gridshells with Thrust Network Analysis
Esjeholm, June-Marie; Haakonsen, Sverre Magnus; Instanes, Daniel May (Master thesis, 2020)I prosjekters startfase er det ofte arkitektens visjoner som spiller førstefiolin, og de lastbærende egenskapene er ikke nødvendigvis i fokus. Når ingeniører på et senere tidspunkt skal verifisere byggets egenskaper risikerer ... -
Design & Evaluation of Discrete Gridshells with Thrust Network Analysis
Esjeholm, June-Marie; Haakonsen, Sverre Magnus; Instanes, Daniel May (Master thesis, 2020)I prosjekters startfase er det ofte arkitektens visjoner som spiller førstefiolin, og de lastbærende egenskapene er ikke nødvendigvis i fokus. Når ingeniører på et senere tidspunkt skal verifisere byggets egenskaper risikerer ... -
Design & Evaluation of Discrete Gridshells with Thrust Network Analysis
Esjeholm, June-Marie; Haakonsen, Sverre Magnus; Instanes, Daniel May (Master thesis, 2020)I prosjekters startfase er det ofte arkitektens visjoner som spiller førstefiolin, og de lastbærende egenskapene er ikke nødvendigvis i fokus. Når ingeniører på et senere tidspunkt skal verifisere byggets egenskaper risikerer ... -
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 behaviour of existing and new railway catenary systems under Norwegian conditions
Nåvik, Petter Røe (Doctoral theses at NTNU;2016:298, Doctoral thesis, 2016)This thesis concerns the dynamic behaviour of railway catenary systems, particularly Norwegian systems. The aim of this PhD study is to increase the knowledge of the dynamic behaviour of these systems. This includes analyses ... -
Dynamic comparison of a railway catenary section upgrade by field measurement assessments
Nåvik, Petter Røe; Rønnquist, Anders (Journal article; Peer reviewed, 2017)The pantograph-catenary interaction is crucial for running trains on electrical railway lines. The coupled dynamic problem of an in space stationary system, the catenary system, and a system in motion, the pantograph, is ... -
Dynamic optimization of railway catenary system by turning unwanted lumped-mass into tuned-mass
zhendong, liu; Stichel, Sebastian; Rønnquist, Anders (Chapter, 2017)The railway catenary is suspended to its supports with droppers, clamps and oth-er fittings. These lumped-masses are made light and small to minimize disturbances. The mass-es cannot be completely removed but can be adjusted ...