More in Less Time: Accelerating your Structural Dynamic Analysis

  • Would you gain more confidence by running more design cycles?
  • Would you push the bounds of accuracy, allowing your Dynamic Analysis models to grow in size (DOF)?
  • Would you simulate reality more closely, increasing the frequency range to match higher pitched noise?

The revolution of e-Mobility has brought about new challenges in automotive NVH and acoustics with requirements to address high frequency and broadband noise. This inclusion of noise level reduction earlier in the automotive design cycle results in extremely large engineering simulation, with systems of equations that have 10s and even 100s of millions of degrees-of-freedom.

Just like decades ago, linear algebra remains at the heart of MSC Nastran and its high-performance computing solutions for noise vibration and harshness (NVH). A relatively recent development is the Automated Component Mode Synthesis (ACMS) solver now an essential part of MSC Nastran.

Over the years, eigen extraction approaches like Lanczos methods have been used in commercial tools to address low-frequency dynamics problems with moderately large finite element systems. However, the introduction of multi-level sub-structuring techniques like ACMS has enabled engineers to address the mid-frequency dynamic range, effectively extracting 10,000 plus modes on large system models and increasing performance using parallel processing. Additionally MSC Nastran’s structural-acoustic multi-physics solutions now employ a discrete Statistical Energy Analysis (SEA) method which combined with finite element modeling addresses both the high-frequency content and the broadband noise.

The performance of MSC Nastran is what enables engineers to do more in less time. Download these HPC Benchmark timings for Vibroacoustics such as those found in NVH and Powertrain applications to help you identify if you are getting the most out of your dynamic analysis.

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