LMS Virtual.Lab System-level NVH for Nastran offers a wide range of interactive tools to assemble components, in a configuration that can drive the Nastran solver. It allows engineers to efficiently and accurately model FE systems, and to compute the noise and vibration behavior of the assembled system directly from the Virtual.Lab user interface using Nastran solution sequences such as SOL103, SOL111, SOL108, etc.
This solution makes it very easy to build a model from one or more FE components. Engineering teams can also build in modal-based models into their FE assembly, which reduces the size of the final assembly and speeds up calculation time without affecting the accuracy of results. This capacity provides the additional advantage of combining FE models of newly developed components with test models of existing or predecessor components. The resulting models allow engineers to simulate full-system noise and vibration behavior from the early development stage onwards.
The components are connected with specific connection properties, ranging from rigid connections to any particular frequency-dependent complex stiffness. The Nastran driver then allows setting up specific Nastran calculations, such as FRF or modal synthesis runs to determine the system’s dynamics or forced response calculations to determine its operational behavior.
A wide variety of NVH specific post-processing tools help engineers in optimizing their design for noise and vibration and to compare it with actual responses using pre-defined or imported targets. Advanced post-processing options can be added to allow engineers to quickly investigate transfer paths and assess the noise and vibration contributions of individual system parts. LMS Virtual.Lab NVH Response Analysis supports the full spectrum of techniques to execute design modifications, from manually triggered modification analyses to fully automated design space explorations.
