Manufacturing and damping enhancing method for pouring type active constrained damping structure

Abstract

Disclosed is a manufacturing and damping enhancing method for a pouring type active constrained damping structure. The pouring type active constrained damping structure comprises actuating material layer (1), a damping material layer (2), a sensing material layer (4) and a controlled material layer (3). The actuating material layer and the sensing material layer are poured into a whole by the damping material layer by means of a U-shaped mold and then the active constrained damping structure is manufactured by sticking the controlled material layer. Damping of the active constrained damping structure is enhanced under the effects of a control module (5), an oscilloscope (6) and an amplifier (7). No matter whether the controlled material layer is in the compressed state or the stretched state, the damping material layer can generate the larger shearing deformation amount; the shearing deformation amount can further increase energy dissipation of the damping material layer and enhance the damping effect; the active constrained layer damping structure is simple, and the stability is good; and the corresponding control system is simple, molding can be achieved through pouring at a time, and the damping effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of material vibration reduction, and in particular relates to a method for preparing a cast-type active restraint damping structure and a damping enhancement method. Background technique [0002] A typical active constrained damping structure is divided into three layers from top to bottom, the upper layer is the constrained layer, the middle layer is the viscoelastic layer, and the lower layer is the controlled layer. shear strain, thereby increasing its energy dissipation capacity. [0003] Baz added a layer of piezoelectric material between the viscoelastic layer and the controlled layer as the sensing layer, using the inverse piezoelectric effect to measure the voltage, electricity, and current when the structure vibrates, and then drive the constrained layer after amplification and feedback, so that The constrained layer has both sensing and actuating capabilities, but ignores the physical and geometri...

AI Technical Summary

Problems solved by technology

[0005] 1. The damping structure of the active confinement layer is complex, the stability is poor, and the corresponding control strategy is complex;

[0006] 2. The constrained layer, the viscoelastic layer and the controlled layer need to be bonded multiple times, the workload is heavy, and the bonding effect directly affects the vibration reduction effect

[0007] The active constrained layer damping structure and the vibration reduction measurement and control method prepared based on pouring have not yet been reported.

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