We offer simulation and vibration design for high performance car. The experience gained with
McLaren, AlfaRomeo, Maserati, Ferrari and Ricardo
allows to cover different range of areas related to NVH
PWT - MOUNTING SYSTEM
Calculation of the vibrating modesof the PWT and optimization of mounting supports in terms of stiffness and location is provided. The driveline torsional dynamics effects and PWT vibration are simulated under the following operating conditions
/ Key OFF
FULL VEHICLE - RIDE & CONFORT
The complete vehicle is modeled and chassis vibration is predicted under PWT and ground sources
to predict the effect of all subsystems joined together. Advanced dynamic analysis is realized using
MSC Adams and Nastran
combined together to include chassis stiffness effect (using MNF models) .
Analysis simulated Vs time, are run in idling, constant or transient speed (WOT) .
This model allows to to evaluate single subsystem contribution to the global vehicle vibration; moreover, time domain analysis show better comparison to real data measurements.
Simulation results are postprocessed using User-friendly program to allow an easy comparison to most output measurements system.
DYNAMIC ANALYSIS and OPTIMISATION
modal map, VTF, inertances
VTFs and calculated transfer functions are provided to be compared with experimental measuremsnts. Calculation simulation enable optimisation and design of components for NVH puroposes.
The sound from vehicle tailpipe can be predicted and calculated using 1D fluid dynamics models. Analysis results can be compared and validated with experimental measurements with a good approximation.
In this way the effect of manifold, turbines, catalysts or muffler can be evaluated and improved. Calculation allow to improve different components to get the target sound required. For high performance car, sound is one of the key aspect of vehicle performance.
Calculation is the fastest, most efficient and cheapest way to solve NVH issues.
The procedure to be used is simple if applied correctly:
- Simple model creation to pick up the NVH issue
- Model calibration with experimental measured data.
- Model optimisation and implement solution on the vehicle
Starting from the target value of noise and vibration, each subsystem target are defined and objectived. Target setting definition is the main and most important aspect to define the NVH final attribute.