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- Building acustics (2) (remove)
Institute
Up to now the research and developmen
t in the field of building acoustics is based mainly on measurements. The
consequence is that the development and optimization of a new building component is a very tedious and
expensive task. A considerably reduction of these costs could be achieved, if the optimization relying on
measurements would be replaced – at least to some extent – by a computational prediction model. Motivated by
these aspects a method is presented for using finite element techniques to estimate the impact sound level from
lightweight floors. The overall approach consists of the three-dimensional modeling of the structure and the
excitation source (tapping machine), the subsequent moda
l- and spectral analyses an
d the computation of the
radiated sound from the ceiling.
Optimization of lightweight floors in the low frequency range with a FEM based prediction model
(2009)
The impact noise transmission at low frequencies is a well
known problem of lightweight floors, which is treated in
many publications. A satisfying solution, considering the
different construction principles of lightweight floors,
could not be found so far. To overcome this problem a
FEM based prediction model for the optimization of the
floor construction and the improvement of the impact
sound insulation has been developed and applied in a
current research project at th
e TU München. The details of
the prediction model were published in [1]-[3]. This
contribution gives an overview of the prediction model
and shows the results of the computations and the
construction rules developed for optimized lightweight
floors.