Efficient Placement of Acoustic Treatment for Electric Vehicle Lightweighting
The hybrid finite element analysis (Hybrid FEA) extends the applicability of finite element models to higher frequencies for vibration and noise simulations. The method has been validated in the past in several automotive applications. In this webinar, we will discuss the workflow of the Hybrid FEA which integrates Altair OptiStruct™ with the Energy Finite Element Analysis (EFEA) code of MES to perform the simulations. A case study will be presented where excitation typical of an electric vehicle motor is considered in frequency ranges above 200Hz. The Hybrid FEA is used for determining the optimal placement and selection of acoustic treatment. The simulations allow to balance the reduction in the interior noise level against the increase in the weight by strategically placing the treatment material on the vehicle body.
Presenter: Nick Vlahopoulos | CTO, Michigan Engineering Services (MES)
Featuring EFEA by MES, available through the Altair Partner Alliance
Using Finite Element Models Beyond Their Upper Frequency Limits in Electric Vehicle Applications
A hybrid finite element formulation that extends the applicability of finite element models to higher frequencies will be discussed. It is based on reducing the size of the finite element model significantly by replacing major parts of the model with equivalent dynamic impedances during the finite element calculations. The Component Mode Synthesis (CMS) approach is combined with analytical solutions of dynamic and static modes for computing appropriate values for the dynamic impedances. The power dissipated by the dynamic impedance elements provides the link to an energy finite element model of the omitted parts for computing their response. Theoretical aspects, the functionality of the implementation, and comparisons between simulations and experiments for production automotive and rotorcraft systems will be presented.
Top Use Cases: EFEA
Presentation introducing a few of the top use cases for the acoustic simulation software by MES.
Energy Finite Element Analysis by MES used to Control Interior Automotive Noise
EFEA uses a library of elements for modeling any physical system.
Energy Finite Element Analysis by MES used to Control Interior Aircraft Noise
With EFEA fewer elements are required compared to FEA, alternative designs can be evaluated rapidly enough in order to influence the design.
EFEA & HyperWorks Datasheet
Capabilities and benefits of the APA's version of EFEA
Competitive Advantages in using EFEA for NVH Analysis for Automotive Applications
This webinar will showcase how to use Energy Finite Element Analysis (EFEA) for mid to high frequency noise and vibration simulations.
Energy Finite Element Analysis for the Mobility Industry
The EFEA method uses energy based primary variables instead of pursuing a displacement based solution as the FEA method does.
Hybrid Finite Element Analysis of a Rotorcraft
The Hybrid FEA method, based on combining conventional Finite Element Analysis with Energy Finite Element Analysis for mid-frequency computations, is applied to a rotorcraft.
Vehicle Airborne Noise Analysis Using the Energy Finite Element Method
EFEA is used to evaluate the exterior acoustic loading in a vehicle.
Publications That Include EFEA
List of publications with relation to EFEA
Files to use for practice in the EFEA Solver.