Numerical Simulation Method of Multi-point Excitation Vibration Based on Inverse Problem Solving

Abstract

The invention discloses a multipoint excitation vibration numerical value simulation method based on inverse problem solving. The idea of the numerical value simulation method is to control acceleration response of by a test piece structure to reversely figure out the excitation force of a test piece, and to figure out the acceleration response of each part of the test piece via the excitation force. According to the multipoint excitation vibration numerical value simulation method, analog computation of a multipoint excitation vibration test numerical value is performed in the inverse problemsolving mode for mainly solving the problem of accurately calculating m acceleration load spectrums on the basis of the output control spectrums in a multiple-input-multiple-output control finite element simulation process, the accuracy and precision of multipoint excitation vibration finite element simulation calculation, the computational efficiency is improved, the safety risks in an aversionmissile entity vibration test are avoided, and the test cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering finite element simulation calculation, and in particular relates to a multi-point excitation vibration numerical simulation method based on inverse problem solving. Background technique [0002] The multi-point excitation vibration test system refers to the vibration test that uses multiple shaking tables to excite the specimen along a single or multiple axial directions at a time. The control method of its control system is developed on the basis of single-axis vibration control technology. Foreign countries have developed control theories and methods such as random vibration control, multi-point sinusoidal frequency sweep control, and multi-point transient vibration. The basic idea of ​​the control method is as follows: the multi-point excitation vibration test system is composed of a vibration table, a test piece, a fixture, a power amplifier, a sensor and a controller, etc. Th...

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Problems solved by technology

[0003] In the field of simulation calculation, it is the most important problem to accurately simulate the finite element calculation results of the multi-point excitation vibration test system. Low and inefficient problems

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