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. Neilsoft team has exclusive access to India ’s premier N&V test facilities at ARAI, Pune for their testing needs. The N&V solution offerings include:

• 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
• 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

Modal testing and correlation to FE based models

• 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