LIGHTWEIGHT FLOOR: STEP BY STEP COMPARISONS BETWEEN MEASURED AND SIMULATED QUANTITIES

摘要

This paper is the result of collaborative work between European members of the Silent Timber Build project. In this work, step by step comparisons are undertaken in regard to measured and simulated mobilities as well as single number values (impact and airborne) for timber joist floors. Such an approach was proposed in order to dissociate, at low frequency, acoustical phenomena and purely mechanical concerns. Thus, aim is to be able to build a robust mechanical model of a complex floor and then to address the whole vibro-acoustic problem. As a first step, narrow band experimental information is used to assess a FEM model of the load bearing structure. Then, the complexity of the system is increased by successively adding layers on top (floating floor) and below (suspended ceiling). Similar comparisons are performed for each step.