Bearing and noise reduction integrated rocket fairing and design method thereof

Abstract

The invention provides a bearing and noise reduction integrated rocket fairing and a design method thereof. The bearing and noise reduction integrated rocket fairing comprises a fairing body and a resonator arranged on the inner surface of the fairing body. The fairing body comprises two layers of panels and a honeycomb sandwich arranged between the two layers of panels; the honeycomb sandwich isprovided with a core, the core is formed by connecting a plurality of honeycombs, the honeycombs are evenly arranged, and the honeycombs are filled with porous sound absorption materials. According tothe fairing, the mechanical bearing capacity can be achieved, the sound insulation amount can be greatly increased, and a comfortable acoustic environment is provided for effective loads in a rocket.

Description

technical field [0001] The present application relates to the technical field of noise mitigation of launch vehicle fairings, in particular to a load-carrying noise-reduction integrated rocket fairing and a design method thereof. Background technique [0002] For the launch vehicle fairing, noise is an important source of excitation for its internal vibration environment. As a protective cover for the rocket to transport loads, the fairing mainly plays the role of sound insulation, heat insulation, and pollution prevention. Generally speaking, when designing the fairing , mainly focus on the performance of the fairing itself, such as mechanical bearing, heat protection, and rain resistance. The sound insulation capability of the fairing itself mainly depends on the rigidity of the structure. After the structure is determined, the sound insulation of the fairing is determined immediately. Domestic launch vehicles often There are also no additional active and passive noise red...

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Problems solved by technology

[0003] At present, laying an acoustic covering layer (porous sound-absorbing material) inside the fairing is a relatively conventional means to reduce the internal noise environment of the fairing. However, laying the acoustic covering inside the fairing will encroach on the inner space of the fairing, especially Yes, acoustic cladding is more difficult to install when low frequency noise reduction measures such as Helmholtz resonators are required inside the fairing

In addition, during the flight of the rocket, it will be subjected to a harsh vibration environment. If it is not handled properly, the acoustic covering layer will easily produce environmental residues, threatening the satellites inside the fairing.

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