Vibration test simulation system and method for slender aircraft

Abstract

The invention provides a vibration test simulation system and method for a slender aircraft, and aims to realize simulation of a random vibration test and improve simulation efficiency. The system comprises a preprocessing module, a finite element modeling module, a condition setting module, an analysis calculation module, a result processing module and a test database; and software involved by the five modules and the test database is integrated in the simulation system. The method comprises the steps of selecting aircraft, vibration table and clamp geometric models, writing a simulation algorithm file in a .m format, determining a control spectrum, inputting known data of the spectrum, and establishing model correction standards; processing the geometric models, the simulation algorithm file and the known data of the control spectrum; performing finite element modeling on the geometric models; setting a control mode and control point positions; reversely calculating a load loaded to the vibration table model; verifying the reversely calculated load; and performing comparison on mean square root errors between response spectrum type data and control spectrum type data of monitoring points to obtain an optimal control point position.

Description

technical field [0001] The invention belongs to the technical field of test simulation, and in particular relates to a vibration test simulation system and a test method of a slender aircraft, which can be used for random vibration test simulation of the slender aircraft. Background technique [0002] Vibration phenomena are often encountered during the transportation and work of objects, and these vibration phenomena will have unpredictable effects on the working reliability of the object. In order to simulate various vibration environments that an object encounters and determine the ability of the object to withstand various vibration environments, it is necessary to conduct a vibration test on the object. Vibration test is a kind of mechanical environment test. According to the nature of loading, vibration test is divided into sinusoidal vibration test and random vibration test. Sine vibration test adopts vibration frequency and amplitude control test; random vibration te...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that this platform can only carry out sinusoidal vibration tests, but it cannot carry out vibration test simulation for random vibration tests which can truly reflect the vibration environment of slender aircraft. During simulation, each step needs to be carried out in different independent software, and each test module is relatively independent, so the test process is more cumbersome and less efficient

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