Flanking transmission over CLT joints
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Sound and vibration (MPSOV), MSc
Publicerad
2023
Författare
Liu, Yanan
Sadowska, Aleksandra
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
With the rise of cross-laminated timber (CLT) popularity as a construction material,
sound transmission control has been considered one of the greatest challenges.
Flanking noise transmission over the junction elements takes a high portion of the
problem. The existing research is focused on the vibroacoustic aspects of the CLT
system, while rather rarely on using the simulation model to predict a specific joint
structure.
The thesis was initially aimed to predict the vibration transmission over a certain
CLT joint by simulating the model with the finite element method (FEM) and comparing
it with the measurement data on-site. Due to the special laminated structure
and the orthotropic material properties of cross-laminated timber, correct modeling
is challenging. A mode-shapes study of a plain CLT panel was successfully done by
testing approaches in both solid and shell modules.
With limited applicable references on FEM modeling of the laminated orthotropic
material as well as the shortage of proper boundary condition study, the simulation
may not give concrete comparable results, rather it might provide useful hints on
the modeling guidelines of CLT elements for the future relevant study.
Beskrivning
Ämne/nyckelord
Cross-laminated timber; CLT building; flanking transmission over CLT joints; finite element method modeling