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Internal fuselage noise: comparison of computations and tests on a Falcon airframe

机译:机身内部噪音:猎鹰机身的计算和测试比较

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摘要

An unequipped Falcon 2000 airframe, a complex heterogeneous structure reduced to the fuselage alone, was subjected to vibro-acoustic characterization within the framework of a cooperative effort by Aerospatiale, Dassault-Aviation, and Onera. Onera's Structural Dynamics and coupled Systems Department measured The structure's vibro-acoustic responses for four mechanical excitation configurations, and analysed three Structural configurations: fuselage alone without floor, with floor, and with floor and internal wall. The Resulting database of vibratory and acoustic level measurements is used for validating numerical models in The low- and medium-frequency range, as well as statistical energy analysis (SEA) models in the medium- and High-frequency range.
机译:在航空航天公司,达索航空公司和Onera公司的共同努力下,无装备的Falcon 2000机身(复杂的异质结构仅简化为机身)就进行了声学声学表征。 Onera的结构动力学和耦合系统部测量了四种机械激励配置的结构振动声响应,并分析了三种结构配置:仅机身不带地板,带地板以及带地板和内墙的机身。振动和声级测量的结果数据库可用于验证中低频范围内的数值模型,以及中高频范围内的统计能量分析(SEA)模型。

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