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:

• 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

Neilsoft has an experienced engineering team providing Computational Fluid Dynamics (CFD) solutions to various Automotive, Marine, Oil & Gas, Power Generation and Aerospace customers with the help of robust simulation methods in conjunction with CFD test correlation. Neilsoft’s CFD center of engineering excellence provides services and solutions in the following areas:

Marine