Spectrum form librating constructing method and debugging method of pendulum impact tester

Abstract

The invention provides a spectrum form librating constructing method of a pendulum impact tester. The method comprises the following steps that influential factors of an impact spectrum form of the pendulum impact tester are determined; major influential factors are combined and arranged via a multi-factor complete factorial experiment, and for minor influential factors, a control variable method is used to implement impact test; curve fitting is carried out to obtain an optimal fitting curve, and a corresponding standard spectrum form is obtained by fitting; and standard spectrum forms are concluded and gathered to obtain a standard spectrum form debugging database. The methods have the advantages that the standard spectrum form debugging database which is convenient to retrieve and easy to analyze is established on the basis of a curve fitting algorithm, the validity and convenience of the database are verified by test of different engineering models, influence of change of different influential factors on the impact response spectrum form is analyzed to obtain a debugging rule of the pendulum impact response tester, a control spectrum form of the impact response spectrum test of a spaceflight product can be guided to establish rapidly, debugging time is shortened, and the test risk is reduced.

Description

technical field [0001] The invention belongs to the technical field of spectral shape library construction, and in particular relates to a method for constructing a spectral shape library of a pendulum test machine and a debugging method. Background technique [0002] When aerospace products work in various links such as transportation, launch, on-orbit and recovery, they will be tested by various complex impact environments. In order to check the existing design problems and processing defects in the development stage, almost all aerospace products need to be assessed by shock environment simulation tests on the ground. At present, there are mainly three types of typical shock environment simulation methods: shaking table simulation, mechanical impact simulation and pyrotechnic explosion shock simulation. Compared with the time-domain waveform, the shock response spectrum in the frequency domain can better describe the effect of damage. Therefore, as a test specification, ...

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Problems solved by technology

[0004] Although the technology of pendulum testing machine is relatively mature, the factors affecting the spectrum shape are complicated, the stability and controllability are poor, and the newly developed products have no ready-made control spectrum shape for reference. Therefore, in order to achieve the control required by the test Spectrum shape, it is necessary to rely on the experience of the test personnel to repeatedly try and pre-adjust the test conditions, which is not only time-consuming and laborious, but also brings many unpredictable safety hazards to the smooth implementation of the product test work. Adverse consequences of overtesting or undertesting

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