LMS Virtual.Lab Interior Acoustics is an end-to-end process solution for interior noise analysis. It offers a single user environment that integrates all the necessary process components: Vibro-Acoustics modeling, excitation and boundary conditions set-up, fluid/structure coupling analysis with optionally managing the Nastran run and excellent visualization, interpretation and refinement possibilities.
LMS Virtual.Lab Interior Acoustics is a premium solution using Virtual.Lab Acoustics Solvers. Dedicated tools include a cavity mesher that generates very fast the acoustic Finite Element mesh of the interior. The resulting mesh is a high quality, frequency dependent HEXA elements mesh, where “Smooth” and “ Sharp“ features are properly taken into account.
The acoustic solver offers a complete set of frequency dependant acoustic properties, such as panel absorption or volumetric absorption from vehicle seats. Structural damping from the trim can also be modeled and optimized for a better interior acoustics. The acoustic modes of the cavity can be solved efficiently using fast iterative solvers and deeply analyzed to get a first insight into the interior acoustic issues and a unique ATV technology that allows re-using the acoustic FEM solutions from a first run, can be used to model very fast different design variants with multiple loading conditions.
LMS Virtual.Lab Interior Acoustics also offers Panel Contribution Analysis capabilities that help assessing the contributions of individual panels into the overall sound pressure inside the vehicle. Detailed Grid contribution (so-called Hot-spot detection) is also supported to thoroughly understand and pinpoint the problems. Optionally, Virtual.Lab Interior Acoustics can be extended with Modal Contribution Analysis to identify the structural modes of the system that are contributing the most to the interior noise level and with the Path contribution analysis to identify which path is predominant in the sound transmission into the cabin.
