Neilsoft has a specialist engineering team providing solutions for Noise & Vibration related problems for premier clients in the Automotive, Marine and Aerospace industry. The team uses robust simulation methods coupled with testing to address structural dynamic issues in mechanical, hydro-mechanical and rotary equipment type systems. The problem resolution is via structure and airborne vibration & noise (N&V) source detection, test-CAE based problem diagnosis, N&V path propagation study, virtual design improvements and test based verification. The N&V solution offerings include:
Vibration control in vehicles and operating machineries
- Frequency response analysis and signature studies such as:
- Automotive passenger & commercial vehicles
- Powertrain Idle shake response at Steering wheel, Seat track & I/P
- Road induced shake
- Driveline unbalance induced vibrations
- Exhaust flow induced vibrations
- Automotive passenger & commercial vehicles
- Source identification using test-CAE based hybrid approach
- Vibration path propagation study using FE methods
- Vibration control methods including
- Structural stiffness modifications
- Surface damping & tuned absorbers
- Vibration isolation
- Order tracking and forced response analysis for rotary equipments
Vibration control in vehicles and operating machineries
- Bungee cord testing with impact hammer and EM shaker loading
- Measurements via Accelerometer or Laser vibrometer
- Dynamic/modal parameter estimation and correlation including
- Natural frequencies
- Damping factors
- Mode shape vectors
- Mode sensitivity studies & participation factors
- LMS-VL and CADAX systems for testing & correlation
- MSC NASTRAN for structural analysis
Noise control & Acoustic simulations
- Interior cabin acoustic characterization — Automotive, Ship and Airplane cabins
- Structural radiated noise measurement and mitigation
- Product noise testing using ARAI's semi-anechoic and reverberation chamber in accordance with ANSI, ISO and other standards
- Noise prediction using CAE based simulation methods and correlation to testing, for example:
- Automotive Powertrain Part/Wide open throttle noise & Transmission/Axle Gear noise
- Hydrodynamic & on-board machinery induced structure-borne noise in ships / yachts
- Environmental & industrial noise modeling
- Vehicle pass by noise (noise generation by cars, CVs, rail systems)
- Characterizing and mitigating Noise generated in Industrial plants, by Theme park equipments, within indoor factories etc
- Noise Simulation Tools used: MSC NASTRAN, LMS-VL, MATLAB