Newsletter - Structural Dynamics - Department of structural engineering
Gunnstein Thomas Frøseth is now an associate professor at the structural dynamics group. Dr. Frøseth had recently completed his PhD studies at the same group with the dissertation titled
"Load model of historic traffic for fatigue life estimation of Norwegian railway bridges"
We wish him a warm welcome!
A new bursary for young researchers within the field of wind engineering and bridge dynamics.
The late Professor Thomas A. Wyatt and his family wanted to contribute to the work of young researchers within the areas of wind engineering and bridge dynamics at Norwegian universities. Papers produced by PhD-candidates and post docs affiliated with the Norwegian University of Science and Technology (NTNU) and the University of Stavanger are hereby invited to apply for the award.
From left to right: Mathias Eidem (NPRA), Eileen Wyatt, Anders Rønnquist (NTNU)
About Thomas A. Wyatt
Wyatt was a key figure in the creation of the Wind Engineering Society in the UK. From 2014 until he passed away in January 2018, he was an expert advisor for the fjord crossing group in The Coastal Highway Route E39-project. Read more about Wyatt’s scientific contribution: https://www.ice.org.uk/eventarchive/bridge-aerodynamics
Up to 2 papers may be awarded each year. The amount of the award is 35.000 NOK. The award is meant to help the winner to visit relevant international well-known research groups, and /or participate in conferences.
Dr. Tom Wyatt
How to apply
The first author of a candidate paper will be considered as an applicant and she/he must apply for the award by herself/himself, there is no nomination or recommendation procedure.
The applicant is asked to submit the following application materials:
• CV (one page)
• The paper to be considered for the award with a verification of its publication during the period from August 1st of the last year to July 31st of the current year
• If the paper has co-authors, please provide an accompanying statement about the applicant’s and the co-authors’ contributions to the paper and contact information
• name/e-mail address/phone number to a reference person who is familiar with the applicant’s research.
The application for the award can be sent (either in English or Norwegian) to the following e-mail address:
Any questions can be directed to one of the administrators of the award:
• Manager Fjord Crossings Coastal Highway Route E39, Mathias Egeland Eidem email@example.com
• Professor Anders Rønnquist, firstname.lastname@example.org
The applicant will receive a confirmation e-mail with a registration number for her/his paper.
The deadline for submission of the application is September 1st 2019.
The dynamics group was recently represented at the 9th International Conference on Bridge Maintenance, Safety and Management (IABMAS) held in Melbourne, Australia.
Prof Anders Rønnquist, with a paper titled “Inspection of steel bridges by modal hammer from bridge deck only”, presented the Hell test arena and the latest results obtained. The international audience welcomed this full-scale bridge test site with some interesting comments and suggestions. Additionally, the former member of the dynamics group, Daniel Cantero, presented the paper “Maximum stresses in mooring lines during parametric excitation” as part of the Mini-Symposium Submerged Floating Tunnels and Underwater Tunnel: Design, Safety and Maintenance Issues.
Would you like to solve new problems and become an expert in bridge engineering? We have announced two new PhD positions on Jobbnorge:
From 12th to 13th of June, members of the Structural Dynamics group attended the 20th Nordic Seminar on Railway Technology in Gothenburg, Sweden. The conference was organized and hosted by the Chalmers University of Technology, in collaboration with the Chalmers Railway Mechanics (CHARMEC) group.
Professor Anders Rønnquist and PhD candidate Stefano Derosa presented the group work regarding the dynamic of pantograph/catenary interaction and the Hell Bridge test arena, giving rise to interesting conversations and debates with the other participants from all the Nordic countries.
On Friday 8th of June, the first biannual group seminar of 2018 was held at the Department of Structural Engineering at NTNU. According to the tradition of the group seminars, selected PhD students gave 45-minutes-long presentations on ongoing research:
- A brief introduction of our study on pantograph-catenary system dynamics and application of non-contact detection (F. Duan/SWJU-NTNU)
- MatLab toolbox for Machine Learning (Y. Xu/NTNU)
- Getting started with Python in science and engineering (G.T. Frøseth/NTNU)
- Working with the Python API in Abaqus (Ø.W. Petersen/NTNU)
- Hard parametric life (M. Luczkowski/NTNU)
Following the interesting talk during the seminar, a dinner at Sabrura concluded the event.
On Friday 6th of April, Aksel Fenerci defended his PhD thesis entitled “Full-scale investigation of the effects of wind turbulence characteristics on dynamic behavior of long-span cable-supported bridges in complex terrain”. Previous to the defense he held the trial lecture with the assigned topic of: “Application of wind and turbulence data in relation to atmospheric meso and microscale models in the design of long-span bridges”
Opponents were Professor Giovanni Solari from University of Genoa (Italy) and Associate Professor John Owen from University of Nottingham (UK). Main supervisor during the PhD was Associate professor Ole Øiseth.
The Structural Dynamic group is pleased that Aksel will continue as Post Doctor at the Structural Engineering Department here at NTNU.
13th of February, Bartosz Siedziako defended his PhD thesis entitled "Modelling of the self-excited forces for bridge decks subjected to random motions: an experimental study". The trial lecture had the following prescribed subject: "Cable vibrations in cable supported bridges".
A video of the wind tunnel rig made by Bartek for his PhD work can be found on YouTube.
Opponents were Professor Alberto Zasso from Politecnico di Milano (Italy) and Dr.ing. Ketil Aas-Jakobsen from Aas-Jakobsen AS. Associate Professor Ole Øiseth was the main supervisor.
The group wish Bartek the best of luck on his new job as a structural engineer at Norconsult in Trondheim.
From the 12th to 15th of February, members of the Structural Dynamics group attended the 36th International Modal Analysis Conference (IMAC XXXVI) in Orlando, USA. The conference was hosted by the Society for Experimental Mechanics.
Professor Anders Rønnquist was chair for one session in dynamics of civil structures. Rønnquist, Post docs Petter Nåvik and Knut A. Kvåle and PhD candidate Stefano Derosa all presented their papers at the conference. The conference was very interesting, and the group plan on attending the upcoming IMAC in Fenruary 2019.
Tuesday August 15th, members of the Dynamic Group went on a field trip to Fokstua, on the Trondheim – Oslo railway line, to mount, with the support of Bane NOR and Jernbanedirektoratet, a wireless monitoring system for railway catenaries. This system, recently developed in collaboration between NTNU and Elektromotus, will help in investigating the dynamics of railway catenary systems and the pantograph-catenary interaction, with the objective of an increased knowledge about the system. This will lead to a better utilization of existing infrastructure, and will help in the development of new ones.
From Monday 21st to Tuesday 22nd of November, members of the Dynamic Group went on a field trip to Vålåsjø, on the Trondheim – Oslo railway line, to collaborate with Bane NOR and Jernbanedirektoratet on mounting a monitoring system on one of the catenary poles, and a weather station for wind measurement. Aim of the study is to correlate the dynamic behaviour of the catenary infrastructure with the environmental excitation due to wind itself. The measuring system for pole monitoring is composed by the National Instrument CompactRIO platform that collects data from the Dytran Instruments piezoelectric accelerometers mounted in different locations along the pole height.
In August, the first measurements were performed at the Hell Bridge Test Arena by the PhD candidates Bjørn Thomas Svendsen and Gunnstein Frøseth including Professor Anders Rønnquist. These are the first in a series of measurements with the main objective of detecting damage to improve inspection of bridges.
The Hell Bridge Test Arena is a full-scale laboratory where an old railway bridge is moved to new foundations on land. The bridge serves as a test arena for research and development related to structural health monitoring (SHM), detecting structural damage, performing inspection and estimating remaining service life of bridges.
15th of December, Knut Andreas Kvåle defended his PhD thesis entitled "Dynamic behaviour of floating bridges exposed to wave excitation: A numerical and experimental investigation". The trial lecture had the following prescribed subject: "Strength assessment of end anchored floating bridges".
Opponents were Associate Professor Elsa Cateano, University of Porto (Portugal) and Chief Engineer Bernt Jakobsen from the Norwegian public roads administation.
The Structural Dynamics group is pleased that Knut Andreas will continue his good work in a 50% post doctoral position at NTNU, in addition to his work at the civil engineering consultant Aas-Jakobsen.
Friday November 24, the biannual Structural Dynamics group seminar was held at the Department of Structural Engineering, NTNU. A selection of group members held a 45 min presentation on a topic related to their work, on the format of an introductory lecture. Each lecture presented the basics of the topic and progress into more detail at a level which everyone in the group were able to follow. The following presentations were held:
- The definitive guide to the National Instruments Compact Rio measurement system. E. Sandberg
- Aeroelastic Bridge Model - System Reduction & Numerical Time Integration. R. N. Møller, DTU/Rambøll/NTNU
- An introductory lecture on fluid-structure interaction. T. Helgedagsrud, NTNU
- The theory of Wavelets and application to problems in structural engineering. S. Derosa, NTNU
All presentations were very interesting and informative, and gave rise to fruitful discussions on the topics. The seminar day was completed with dinner at AiSuma.
From the 12th to 14th of July, former Postdoc Daniel Cantero attended the 7th International Conference on Experimental Vibration Analysis for Civil Engineering Structures in San Diego, California, United States. The conference was hosted by the Department of Structural Engineering of the University of California, San Diego. The EVACES2017 aims to bring together engineers, scientists, researchers, and practitioners to provide a forum to disseminate and discuss latest developments and achievements in all major aspects of dynamic testing of civil engineering structures. Daniel Cantero presented his paper entitled “Time-frequency analysis of suspension bridge response for identification of vortex induced vibrations”, co-authored by Associate professor Ole Øiseth and Professor Anders Rønnquist.
Sunday the 9th of July, members of the Structural Dynamics group visited the Southwest Jiaotong University in Chengdu, China to discuss future collaboration with the railway group at the University. Professor Anders Rønnquist held a presentation about NTNU and the group’s research, and representatives from SWJTU presented their work. One of their PhD candidates, Fuchuan Duan, is going to spend one year here at NTNU working on his thesis, arriving this fall.
Thanks to Professor Zhigang Liu at the Southwest Jiaotong University for arranging this nice and highly interesting visit. The guided tour of the Giant Panda Breeding and Research Base was also greatly appreciated. We are looking forward to future collaborations, and hope for more productive and fruitful discussions within the near future.
From the 10th to 12th of July, members of the Structural Dynamics group attended the First International Conference on Rail Transportation in Chengdu, China. The conference was hosted by the Southwest Jiaotong University in Chengdu, and co-sponsored by the International Journal of Rail Transportation.
Professor Anders Rønnquist was specially invited to the conference, and held an invited lecture at a catenary system session. Postdoc Petter Nåvik and PhD candidate Gunnstein Frøseth also presented at the conference, accompanied by newly started PhD candidate Stefano Derosa. The conference was highly interesting, and the group hope to attend the next ICRT conference.
The Structural Dynamics group proudly announces that Aksel Fenerci was awarded the PhD award for the best young researcher's paper and presentation at the 7th European and African Conference on Wind Engineering held in Liege, Belgium. His paper entitled “Evaluation of wind-induced response predictions of a long-span suspension bridge using full-scale measurements” is available on ResearchGate and on his NTNU profile.
From the 4th to 7th of July, members of the Structural Dynamics group attended the 7th European and African Conference on Wind Engineering (EAWCE 2017) in Liege, Belgium. The conference was the 7th in a series of European and African conferences organized on a four-year cycle under the auspices of the International Association of Wind Engineering. A total of 235 delegates participated on the conference.
Associate professor Ole Øiseth and PhD candidates Aksel Fenerci, Tor Martin Lystad, Bartosz Siedziako and Henrik Skyvulstad held presentations at the conference, where Aksel Fenerci was given an award for best PhD paper. This is a great accomplishment and the group’s second award this year. Congrats Aksel!
Thursday June 29, the biannual Structural Dynamics group seminar was held at the Department of Structural Engineering, NTNU. A selection of group members held a 45 min presentation on a topic related to their work, on the format of an introductory lecture. Each lecture presented the basics of the topic and progress into more detail at a level which everyone in the group were able to follow. The following presentations were held:
- Introduction to bridge weigh-in-motion. Daniel Cantero Lauer
- A primer on force identification by Kalman filters. Øyvind W. Petersen
- Fundamentals of the strain gage and strain gage measurements. Gunnstein T. Frøseth
- A lecture on operational modal analysis and stochastic subspace identification. Knut A. K. Kvåle
All presentations were very interesting and informative, and gave rise to fruitful discussions on the topics. The seminar day was completed with dinner at Bakklandet.
From the 12th to 14th of June, members of the Structural Dynamics group attended the International Conference on Earthquake engineering and Structural Dynamics (ICESD 2017) in Reykjavík, Iceland. The conference was organized in honour of late Professor Ragnar Sigbjörnsson, an Icelandic professor that worked as a professor at NTNU from 2009 until his death in July 2015. Sigbjörnsson was an influential researcher, and supervised several PhD students during his time at NTNU.
The group’s contribution was highly appreciated by the conference organizers, thanking us for our strong presence and excellent presentations. Professor Anders Rønnquist held a keynote presentation, and all four PhD candidates (A. Fenerci, K.A. Kvåle, Ø.W. Petersen and B. Siedziako) presented their work. We really enjoyed the conference and our stay on Iceland, and hope to return some time in the future.