Four-table shunt excitation perpendicular vibration test system with expansion table board

Abstract

The invention discloses a four-table shunt excitation perpendicular vibration test system with an expansion table board. The system comprises four vibration table bodies, four outside lug supports, two inside lug supports, one expansion table board, eight pairs of Pad bearings, four periphery supports, one bearing mounting frame, four movable frame adaptors, one center air spring support, four periphery air spring supports, eight air springs and eight support blocks, wherein the inside lug supports are located in the middles of two outside lug supports, the four vibration table bodies are supported between the inside lug supports and are connected with the above expansion table board through the movable frame adaptors respectively, two layers of the eight pairs of Pad bearings which are symmetrically distributed on the periphery restrain the expansion table board to move in the vertical direction, system anti-overturning moment is realized by preloading horizontal loads on the Pad bearings, and static load support is realized on the expansion table board through the air springs in five positions of the bottom center and the periphery.

Description

technical field [0001] The invention belongs to the technical field of large-scale vibration test equipment development, and in particular relates to an extended platform for four parallel excitation vertical vibration test systems. Background technique [0002] In aerospace, aviation, vehicle and other engineering fields, products work in a certain vibration environment, and structural resonance is one of the main reasons for failures during their operation. As an effective means to test product reliability and dynamic strength, vibration test has been widely used in product performance assessment and dynamic strength appraisal. The main equipment to complete the vibration test is a vibration table, and the vertical extension table is an important component of the vibration table. [0003] The extended table is used to provide the interface between the shaking table and the test piece. When the size of the test piece exceeds the size of the original interface of the shaki...

AI Technical Summary

Problems solved by technology

The common small extended table often only has the interface connected with the vibrating table, but when the size, height and weight of the extended table increase, the load capacity of the vibrating table itself will not meet the requirements, and the lateral stability of the extended table will also decrease. Significantly worse

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