Intelligent modal test system for slender thin-shell structure

Abstract

The invention provides an intelligent modal test system for a slender thin-shell structure, and the system comprises a hoisting unit which comprises a hoisting rope, one end of the hoisting rope is connected with a clamp for clamping a test piece, the other end of the hoisting rope is fixed above the test piece, so that the test piece is suspended, and the test piece is marked with a preset excitation point location; the excitation unit comprises a movable base, a mechanical arm and a force hammer, the mechanical arm is connected to the movable base and comprises an arm body and a clamping jaw, the clamping jaw clamps the force hammer, and the arm body is used for driving the clamping jaw to move to be close to the preset excitation point position; the clamping jaw is used for driving the power hammer to perform pitching rotation so as to apply excitation force to a preset excitation point position; a pressure sensor is arranged in the force hammer and is used for sending pressure data; and the acquisition unit comprises a high-speed camera which is used for acquiring image data in real time. According to the intelligent modal test system for the slender thin-shell structure provided by the invention, the uncertainty of traditional manual excitation application is effectively overcome, and the stability and repeatability of test data are ensured.

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