Structural Dynamics

  • The Hardanger Bridge seen from the top of the tower. Photograph by NTNU/Aksel Fenerci.

     

     

  • Railway catenary system at Fokstumyra in Dovrefjell. Photograph by NTNU/Petter Nåvik.

     

     

  • Below the bridge deck of the Bergsøysund Bridge. Photograph by NTNU/Gøran Loraas.

     

     

The research field of Structural Dynamics combines numerical simulations, laboratory experiments and site measurements on existing structures. This also include development, and application, of new methods and techniques for numerical simulation of dynamic response. 

Safety and reliability are important factors for all application areas, and one main goal of the research is to generate data that may be used to improve the design of bridges and railways and help extend the technology to solve the challenging problems of the future.   

PhD defense of Bartosz Siedziako

13th of February, Bartosz Siedziako defended his PhD thesis entitled "Modelling of the...
15.02.2018

Bartosz Siedziako portrait picture

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. 

Structural dynamics conference in Orlando, USA

From the 12th to 15th of February, members of the Structural Dynamics group attended the ...
15.02.2018

Post doc Knut A. Kvåle, Professor Anders Rønnquist, Post doc Petter Nåvik and PhD candidate Stefano Derosa at IMAC XXXVI in Orlando, USA. Photo by NTNU/Knut A. Kvåle.

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. 

Measurement trips to Fokstua and Vålåsjø

Tuesday August 15 th , members of the Dynamic Group went on a field trip to Fokstua, on...
18.12.2017

Pictures from the measurement trip to Fokstua. Photo by NTNU/Stefano Derosa.

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.

Pictures from the measurement trip to Vålåsjø. Photos by NTNU/Stefano Derosa.

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.

First measurements at the Hell Bridge Test Arena

In August, the first measurements were performed at the Hell Bridge Test Arena by the PhD...
18.12.2017

Measurements at the Hell Bridge Test Arena. Photo by NTNU/Bjørn Thomas Svendsen.

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.

PhD defense of Knut Andreas Kvåle

15th of December, Knut Andreas Kvåle defended his PhD thesis entitled "Dynamic behaviour...
15.12.2017

Knut Andreas Kvåle portrait picture

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.