Acoustic modal testing and simulation analysis on vehicle interior cavity

With regard to a specific medium-sized commercial vehicle,the acoustic modal of vehicle interior cavity is tested and analyzed based on LMS Test.Lab modal analysis system.By comparing the acoustic frequency with the structural modal frequency,the acoustic-inherent coupling of critical frequency can be avoided,whereas the low-frequency noises are decreased.In addition,relevant finite element model is established for acoustic modal simulation and computation.Therein,this approach sets a reference to reducing the vehicle interior noises and improving the vehicle interior acoustic properties.