@article{SchoepferHopkinsMayretal.2016, author = {Sch{\"o}pfer, Fabian and Hopkins, Carl and Mayr, Andreas R. and Schanda, Ulrich}, title = {Entwicklung eines SEA-Modells f{\"u}r eine Holzrahmenbauwand mit N+F Beplankungslagen}, series = {DAGA 2016, 42. Deutsche Jahrestagung f{\"u}r Akustik, Aachen, Deutschland}, journal = {DAGA 2016, 42. Deutsche Jahrestagung f{\"u}r Akustik, Aachen, Deutschland}, year = {2016}, abstract = {Holzrahmenbaukonstruktionen stellen in Bezug auf ihre vibro-akustischen Eigenschaften komplexe Systeme dar. Eine Prognose des bei der K{\"o}rperschallanregung durch haustechnische Anlagen erzeugten Schalldruckpegels in angrenzenden R{\"a}umen ist b.d. nicht m{\"o}glich und bedarf entsprechender Modelle. In diesem Beitrag wird die Modellierung einer im Labor aufgebauten Holzrahmenbaukonstruktion unter Verwendung der Statistischen Energieanalyse (SEA) vorgestellt. Die Besonderheit der vorliegenden Konstruktion besteht in ihrem sehr einfachen Aufbau mit beidseitig einschaliger Beplankung durch Spanplatten mit Nut- und Federverbindung (N+F), sowie horizontalen und vertikalen Plattenst{\"o}ßen. In dieser Form weist die Konstruktion einen sehr inhomogenen Aufbau auf. Die Ergebnisse experimenteller Untersuchungen zeigten, dass an den N+F Verbindungen eine signifikante Abnahme der Schwingungsenergie vorliegt. Um diese Erkenntnisse im SEA-Modell zu ber{\"u}cksichtigen, wurden gemessene Kopplungsverluste f{\"u}r die Nut- und Federverbindung verwendet, wohingegen alle weiteren im System ben{\"o}tigten Verlustfaktoren aus Literaturwerten prognostiziert wurden. Ein Vergleich der Ergebnisse aus der SEA-Modellierung mit Messdaten der Schwingschnelle auf den Beplankungslagen sowie der Schalldruckpegel in den Wandhohlr{\"a}umen wird vorgestellt.}, language = {de} } @inproceedings{GaussKohrmannMayretal.2016, author = {Gauß, Daniela and Kohrmann, Mathias and Mayr, Andreas R. and Schanda, Ulrich}, title = {Empfangsplattenpr{\"u}fstand aus einer Holzwerkstoffplatte}, series = {Deutsche Gesellschaft f{\"u}r Akustik e.V. (ed.): Fortschritte der Akustik - DAGA 2016, 42. Deutsche Jahrestagung f{\"u}r Akustik, Aachen, Deutschland.}, booktitle = {Deutsche Gesellschaft f{\"u}r Akustik e.V. (ed.): Fortschritte der Akustik - DAGA 2016, 42. Deutsche Jahrestagung f{\"u}r Akustik, Aachen, Deutschland.}, year = {2016}, language = {de} } @article{HopkinsFilippoupolitisFerreiraetal.2016, author = {Hopkins, C. and Filippoupolitis, M and Ferreira, N. and V{\"o}ltl, R. and Schanda, Ulrich and Mahn, J. and Krajci, L.}, title = {Vibroacoustic finite element modelling of the low-frequency performance of a solid timber floor formed from dowel-connected joists}, series = {Proceedings of Inter-Noise 2016}, journal = {Proceedings of Inter-Noise 2016}, year = {2016}, abstract = {This paper investigates the prediction of low-frequency impact sound insulation for a solid timber floor formed from dowel-connected joists with Swiss hardwood. A finite element model was developed for the dynamic response of the floor as it is neither homogeneous nor isotropic and has complex connections. With point force excitation, a FEM model for the dynamic response of the floor was validated using experimental modal analysis in the laboratory. Two different FEM models were developed, one using spring connectors and the other using join connectors. Good agreement between FEM and measurements in terms of the Modal Assurance Criterion (MAC) and eigenfrequencies was achieved for the first 14 modes with the spring connector model and for the first 7 modes with the join connector model. However, for the vibroacoustic analysis it was necessary to use the join connector model due to the computational instabilities of the spring model above 100 Hz when it was coupled to the acoustic medium. With mechanical excitation the radiated sound power from the underside of the timber floor was measured with sound intensity in order to calculate the radiation efficiency. Comparison of measurements and FEM showed reasonable agreement between 20Hz and 200Hz}, language = {en} } @inproceedings{KohrmannBuchschmidSchandaetal.2016, author = {Kohrmann, M. and Buchschmid, M. and Schanda, Ulrich and M{\"u}ller, G.}, title = {A FEM-based planning tool for the vibro-acoustic design of wooden floors at low frequencies}, series = {Proceedings of Inter-Noise 2016}, booktitle = {Proceedings of Inter-Noise 2016}, year = {2016}, abstract = {Within the scope of the recently finished cooperate research project "VibWood" at Technical University of Munich and Rosenheim University of Applied Sciences, fully parametrized numerical models for lightweight wooden floor constructions have been developed and calibrated by experimental modal analyses. Based on a vast parametric study including floating floors and suspended ceilings a database of narrowband sound power levels in the frequency range up to 125 Hz for a wide range of floor dimensions has been set up. A procedure will be presented on how to process the numerical data and derive single number values that allow a comparison to the standardized rating of impact sound insulation according to DIN EN ISO 717-2. The derived data is implemented into a graphical user interface (GUI). This GUI is available for free. The database is open for additional geometries and will be enhanced by different constructions in the near future.}, language = {en} } @article{KarlingerBarthHartmannetal.2016, author = {Karlinger, Peter and Barth, Simon and Hartmann, Markus and Michanickl, Andreas and Schemme, Michael}, title = {Einen Bund eingehen}, series = {Bauen mit Holz}, journal = {Bauen mit Holz}, year = {2016}, language = {de} }