Method for the acoustic analysis of a body and a system for the execution of such a method

摘要

A system and method for the acoustic analysis of a body, in particular a fuselage structure of an aircraft, is provided including: inputting data for geometry, material, boundary conditions and acoustic parameters of the body, generating a body idealized in terms of its structural mechanics, and a cavity simulating the interior of the body, on the basis of the data inputted as a numerical body model, inputting the geometry of the body with a pattern of nodes and the generation of finite elements, stimulating an acoustic loading case by subjecting the body model to at least one sound pressure wave at a defined frequency, analyzing the effect of the sound pressure wave on the body model, and outputting a sound reduction index (R) for the body with reference to that frequency.

主权项

1. A method for performing acoustic analysis of a body, in particular of a fuselage structure of an aircraft, the method comprising:
inputting data for geometry, material, boundary conditions, and acoustic parameters of the body, the data including a definition of meshing of the geometry; coordinating a fineness of a mesh with the boundary conditions and a defined frequency to be simulated; generating a body model idealized in terms of its structural mechanics, and a cavity simulating a body interior, based on the data inputted as a numerical body model; registering the geometry of the body with a pattern of nodes and a generation of finite elements; simulating an acoustic loading case by subjecting the body model to at least one sound pressure wave at the defined frequency; analyzing effects of the at least one sound pressure wave on the body model; and outputting a sound reduction index (R) for the body with reference to the defined frequency; wherein the data inputted is automatically checked and a plurality of reports are continuously generated, as the body model is being generated, to form a quality management system based on the plurality of reports, and wherein the plurality of reports include numerical and geometric characteristics of the body model.