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Method of acoustics simulated analysis and optimization for cabin of passenger plane

A technology of simulation analysis and optimization method, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as large differences in aircraft structural characteristics, and achieve the effect of reducing workload and speeding up calculation.

Inactive Publication Date: 2013-08-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

In addition, the structural characteristics of different types of aircraft are quite different. Therefore, the theoretical analysis and control methods for aircraft cabin noise need further in-depth research.

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  • Method of acoustics simulated analysis and optimization for cabin of passenger plane
  • Method of acoustics simulated analysis and optimization for cabin of passenger plane

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Embodiment Construction

[0019] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0020] Such as figure 1 As shown, the acoustic simulation analysis and optimization method for the passenger aircraft cabin proposed by the present invention includes the following steps:

[0021] Step 1. Taking the passenger plane cabin as the prototype, based on HYPERMESH, adopt the free mesh division method, and use the shell unit, beam unit and mass unit to establish the cabin structure grid model including seats. The interior of the cabin model includes structures such as windows, interior cabins, floors, reinforced frames, ceilings, and support plates. There are three rows of seats in the front, middle, and rear of the cabin to consider the impact of the seat structure on the sound field in the cabin; The partition walls are located at both ends of the engine room, sealing the two ends of the cylindrical shell, so that the actual cabin structure ...

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Abstract

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.

Description

technical field [0001] The invention relates to an acoustic simulation analysis and optimization method for passenger aircraft cabins, and belongs to the technical field of cabin vibration acoustics. Background technique [0002] Nowadays, the civil aviation industry at home and abroad is in a period of rapid development. Under the background that the safety and flight performance of aircraft have been significantly improved, cabin noise is an important factor affecting safe driving, and it is also an important index evaluation of ride comfort. Therefore, indoor The noise problem has attracted more and more people's attention. The analysis and control method of cabin noise is of great significance in aviation noise research. [0003] Since the early 1980s, scholars at home and abroad have conducted a lot of research on the theoretical analysis methods of aircraft cabin noise, and have developed some research methods for aircraft cabin noise analysis and control, which are m...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王丽丽李舜酩于国强王前
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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