Large diameter strap-on carrier rocket modal test measurement point arrangement and optimization method

A technology for launch vehicles and modal testing, which is applied in measurement devices, vibration testing, and testing of machine/structural components, etc. It can solve the problem of not publicly publishing the method of measuring points for modal testing of large-diameter bundled launch vehicles. The effect of reducing the number of measuring points and improving the test efficiency

Inactive Publication Date: 2018-02-16
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
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Problems solved by technology

[0005] In the prior art, there is no published relevant information about the method of measuring point layout for the modal test of a new generation of large-diameter bundled launch vehicle

Method used

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  • Large diameter strap-on carrier rocket modal test measurement point arrangement and optimization method

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Embodiment Construction

[0036] refer to figure 1 :

[0037] The arrangement and optimization method of the modal test measuring points of the large-diameter bundled launch vehicle of the present invention, wherein, the large-diameter bundled launch vehicle includes: a core stage 1, a booster 2, a core-stage large-diameter storage tank 3, an engine Branch 4, core secondary internal branch 5, payload internal branch 6; the method includes the following steps:

[0038] Step 1. According to the structure and modal characteristics of the large-diameter bundled launch vehicle, a preliminary layout plan for the measuring points is worked out:

[0039] In the full-arrow modal test, two rows of sensors are arranged at intervals between adjacent quadrants of the main structure of core stage 1, and sensors are arranged at the interface of the docking surface; two rows of sensors are arranged at intervals at opposite quadrants of booster 2, and the Sensors are arranged above and below the interface on the surf...

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Abstract

The present invention relates to a large diameter strap-on carrier rocket modal test measurement point arrangement and optimization method used for the space combination measurement point arrangementof a new generation large diameter strap-on carrier rocket full-rocket modal test. The method considers a combined mode of the five elastic branches of a whole rocket, a core-level large diameter storage box local mode, an engine branch mode and the like, and carries out the iterative optimization on the measurement point arrangement via a trial test method, so that the number and the positions ofthe measurement points are optimal, and the test efficiency is improved. The method can guarantee the situation that all modal parameters in an appointed frequency band can be obtained in a large-scale rocket modal test, thereby not losing the modes.

Description

technical field [0001] The invention relates to a large-diameter bundled launch vehicle modal test measuring point arrangement and an optimization method, and belongs to the field of modal tests of launch vehicles and other large vehicles. Background technique [0002] With the continuous development of aerospace technology, the demand for manned moon landing projects and space station construction has become increasingly urgent, which puts forward higher requirements for the carrying capacity of launch vehicles. The previous launch vehicles can no longer meet the above-mentioned new demands. my country has developed a new generation of large-diameter bundled launch vehicle, which has greatly improved its carrying capacity and can meet the requirements of manned moon landing and space station construction. However, the diameter and structure of the new generation of large-diameter bundled launch vehicle have undergone tremendous changes. The diameter of the core stage increa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/00
Inventor 王鹏辉张永亮贾文成冯颖川杨正玺
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
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