An integrated rocket fairing with bearing and noise reduction and its design method

Abstract

The present application provides a load-carrying and noise-reducing integrated rocket fairing and its design method, comprising: a fairing main body and a resonator arranged on the inner surface of the fairing main body; the fairing main body includes two layers of panels and is arranged on two A honeycomb sandwich core between the panels; the honeycomb sandwich core has a core, the core is formed by connecting a plurality of honeycomb cells, the plurality of honeycomb cells are evenly arranged, and the honeycomb cells are filled with porous sound-absorbing material. The fairing of the present application can not only realize the mechanical bearing capacity, but also greatly improve the sound insulation, and provide a comfortable acoustic environment for the payload inside the 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...

AI Technical Summary

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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