Optimization of NVH and Cost by Using Spray Damping Material

1
Optimization of NVH and Cost by Using Spray
Damping Material
Motor Company uses asphalt deadener sheets for
its passenger vehicles to reduce noise and
vibration from engine and road surface. It is
very difficult to reduce unnecessary weight from
the deadener by changing freely their shapes.
There is also a damping performance limit in the
asphalt sheet due to its inherent material
properties. Therefore, a newly developed spray
damping material is proposed to replace these
weight and low damping asphalt sheets.
Needs

• lt Vehicle Test gt
• Sound Pressure Level (3 point)
• Articulation Index (ANSI S3.5 Standardized)
• Composite Ratings of Preference

• lt Material Test gt
• Sound Transmission Loss Test
• Damping Loss Factor Test
• Material Stiffness Test

Goals

• To Reduce Noise Level inside a Car using
  Excellent Automotive Damping Material.
• Realization of Optimal Design to Improve Vehicle
  NVH Performance and Cost Reduction.
• Developing the Effective Damping Optimization
  DesignTechnology with Spray Deadener.

Technical Aspect

• Development of Vehicle NVH Evaluation Methodology
  such as SPL, AI and CRP.
• NVH Optimization through Sound Intensity, Panel
  Contribution Analysis, Vibration Mapping, Noise
  Transfer Function, BIW Modal Test, etc.