Calibration and validation of the dynamic response of two slab track models using data from a full-scale test rig
Artikel i vetenskaplig tidskrift, 2021

For the development of accurate and reliable simulation models, the procedure of calibration and validation against measurement data is essential. In this paper, a finite element model and a waveguide finite element model of a slab track are calibrated and validated against hammer impact measurement data from a full-scale test rig. The finite element model is three-dimensional, where the rails are modelled as Rayleigh–Timoshenko beams and the concrete slab and support layer are modelled using linear shell elements. In the waveguide finite element model, a constant track cross-section described by two-dimensional finite elements is assumed, and the vibration in the direction perpendicular to the cross-section is described by propagating waves that are decaying exponentially. Measured frequency response functions (FRFs) are compared with the corresponding calculated FRFs from the two modelling approaches. The calibration is conducted in two steps using (i) a parameter study and (ii) a genetic algorithm. For multiple excitation positions and sensor locations, both calibrated models capture the trend of the Single-Input Multiple-Output measurements with rather small deviations compared to the overall dynamic range. This implies that both models can successfully represent the dynamic response of the test rig and can be considered as validated.

Track receptance

Hammer impact measurements

Genetic algorithm

Single-Input Multiple-Output

Finite element

Slab Track

Waveguide finite element


Jannik Theyssen

Chalmers, Arkitektur och samhällsbyggnadsteknik, Teknisk akustik

Emil Aggestam

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Shengyang Zhu

Southwest Jiaotong University

Jens Nielsen

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Astrid Pieringer

Chalmers, Arkitektur och samhällsbyggnadsteknik, Teknisk akustik

Wolfgang Kropp

Chalmers, Arkitektur och samhällsbyggnadsteknik, Teknisk akustik

Wanming Zhai

Southwest Jiaotong University

Engineering Structures

01410296 (ISSN) 18737323 (eISSN)

Vol. 234 111980

In2Track-2 (CHARMEC EU19)

Trafikverket, 2018-11-01 -- 2021-10-31.

Europeiska kommissionen (EU) (EC/H2020/826255), 2018-11-01 -- 2021-10-31.







C3SE (Chalmers Centre for Computational Science and Engineering)





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