Modular units can be subject to vibration loads, either from external factors such as earthquakes or from operating equipment installed inside the module. When designing a modular unit, it is therefore necessary to take into account dynamic loads in addition to static loads. To control dynamics response and prevent unwanted vibrations, absorbing materials and dampers shall be incorporated in dynamically loaded modular units, and modifications shall be made to the structural elements of the module and to the way it is mounted on the foundation. This makes it possible to avoid potential resonance regions that could cause discomfort in the modular unit or even damage to its components. In the Master's thesis, a numerical modal analysis of the modular unit has been carried out in order to determine the natural frequencies and mode shapes. The analysis focuses on two configurations of the module: without facade panels installed and with various facade panels installed. During the development of the numerical model, special attention has been paid to the correct modelling of the joints. A multi-reference experimental modal analysis was also performed to verify and validate the modal parameters. Based on the results of the experimental modal analysis, an update of the numerical model was then carried out to achieve good accuracy and reliability of the numerical model of the
modular unit.
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