Description and calibration of the ISO tapping machine in numerical impact sound predictive tools

• One of the challenges in wooden constructions is to be able to achieve a good acoustic insulation especially in the low frequency range. The prediction of acoustic performance of wooden buildings before erection becomes important and reliable predictive tools are in great need. To that end, the first question that arises is how to accurately model the excitation source which generates the structure-borne sound. Regarding the impact sound insulation performance of floors, the ISO 717–2 employs the tapping machine as standardised source. Although some investigations have been carried out in recent years aiming at analytically describing the tapping machine as well as modelling it, no satisfactory agreements between modelled and simulated results were achieved. In the investigations reported here, the extension of an existing frequency–domain method to include the tapping machine into finite element predictive tools is presented. Different parametric studies were carried out to investigate how different uncertainties influence the accuracy of the results. Before that, experimental tests on a CLT slab were performed to calibrate the numerical model.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Husbyggnad (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Building Technologies (hsv//eng)

Publication and Content Type

kon (subject category)

ref (subject category)