The invention discloses a method of
acoustics simulated analysis and optimization for a cabin of a passenger plane. The method comprises the following steps that the cabin of the passenger plane is used as a prototype, a free meshing method is adopted based on HYPERMESH
software, a cabin structure grid model containing seats is established, the cabin structure grid model is led into ANSYS in a *.cdb format, a Block Lanczos method is used for carrying out vibration mode analysis, a mode
superposition method is used for carrying out
harmonic response analysis, the vibration
frequency response features of the cabin structure are obtained, a vibration
frequency response feature destination file is led into SYSNOISE as an boundary incentives condition in a *.fre format which is capable of being recognized by the SYSNOISE, a direct
boundary element method is used for finally obtaining
sound pressure frequency response characteristics in the cabin, the cabin structure parameters are selected as design variables, and a lowest
sound pressure order in the cabin is used as a design goal to carry out
sound field optimization of civil aircraft cabins. According to the method of the
acoustics simulated analysis and optimization for the cabin of the passenger plane, not only is the
advantage that a
finite element method is prone to obtaining vibration performance used, but also the
advantage that the
boundary element method obtains acoustic properties fast is brought in to full play, and therefore calculation speed is accelerated.