SU1295251A1 - Vibrator for vibration-testing machine - Google Patents

Abstract

This invention relates to a technique for vibration testing of articles. The aim of the invention is to increase the accuracy of the tests by providing a symmetrical mode of vibration and durability. The resonator is a rectangular cross-section beam 1 with supporting elements in the form of semi-cylinders 2 and 3, oriented across the beam. The supporting elements serve to install the beam 1 on the table 5 of the vibration test bench. Such a resonator can be considered as a beam with hinged ends. The oscillation shape of the beam is symmetrical with respect to the average position, therefore, the test product, installed on the central protrusion 4 of the beam 1, is subjected to the same effect as the beam moves up and down. Due to the hinge support, the stresses in the beam material are reduced and, consequently, the durability of the resonator is increased. 2 Il. "Ff with (L C And gch D {

Description

112

The invention relates to a technique for vibration testing of products, namely, resonators mounted on a table of a vibration test stand for obtaining an increased level of vibration.

The purpose of the invention is to improve the accuracy of testing for, by providing a symmetrical mode of oscillation and durability.

Figure 1 shows schematically the proposed resonator mounted on the table of a vibration test bench; figure 2 - the form of oscillations of the beam when it moves up (curve a) and down (curve b).

The proposed resonator is a beam 1 of rectangular cross section with support elements symmetrically located at its ends in the form of half-cylinders 2 and 3 and a central protrusion 4 serving to install the test article (not shown). The supporting elements serve to install the beam 1 on the table 5 of the vibration test stand. The semi-cylinders 2 and 3 are oriented across the beam 1. The beam 1 is fixed on the table 5 by bolts 6.

The resonator works as follows.

Vibration effect generated by vibration test

Editor A. Shandor Order 610/48

Compiled by V. Shehter Tehred M. Khodanych

Corrector

Circulation 777 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

with

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five

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1 2 with a bench, excites resonant flexural vibrations of beam 1, as a result of which a higher level of vibration acts on the test product mounted on the protrusion 4. A resonator with supporting elements in the form of semi-cylinders can be considered as a beam with hinged-supported ends. As can be seen in Fig. 2, the form of the oscillation of the beam is symmetrical with respect to the average position, therefore, when the beam is moved up and down, the test product will be subjected to the same effect. In addition, due to the articulated support, the stresses in the beam material are reduced, and, consequently, the durability of the resonator is increased.

Claims (1)

Invention Formula A resonator for a vibration test bench, made in the form of a rectangular cross-section beam, having supporting elements symmetrically located at its ends for mounting the beam on the stand table, characterized in that supporting elements perform in the form of a half-cylinder, oriented across the beam. Proofer I.Samborska