Composite material vibration reduction and isolation support with periodic structure

Abstract

The invention discloses a vibration reduction and isolation support made of a periodic structure composite material. The vibration reduction and isolation support comprises a periodic variable cross-section shell (1) and a damping material (2), flanges (101) used for connection are arranged at the two ends of the periodic variable cross-section shell (1), variable cross-section shell units (102) arranged in the axial direction in a limited periodic mode are arranged in the middle of the periodic variable cross-section shell (1), each variable cross-section shell unit (102) is formed by arranging at least two components of different shapes and sizes in the axial direction, each component is of a flange structure, the outer portion or the inner portion of each variable cross-section shell unit (102) is filled with the damping material (2), and the damping material (2) is filled with the damping material (2). The damping materials (2) and the variable cross-section shell units (102) form periodic structure composite material units (3), and the periodic structure composite material units (3) are arranged in the axial direction in a limited periodic mode. The constraint damping and periodic structure band gap principle is applied to the support design, the better vibration reduction and isolation performance is achieved, and the application range is wide.

Description

technical field [0001] The invention belongs to the field of vibration control, and in particular relates to a periodic structure composite material vibration-reducing and isolating bearing. Background technique [0002] The problem of vibration reduction and noise reduction widely exists in aerospace, shipbuilding, bridge construction, rail transit and other fields; the support is a load-bearing component that is in indirect contact with the vibration source equipment, and its own vibration reduction and vibration isolation performance is the solution to vibration reduction. and a way to reduce the noise problem. Vibration reduction and vibration isolation technologies are divided into active and passive. Among them, the space layout and the cost of design and manufacture will limit the application of active vibration reduction and isolation technology. The realization of passive vibration reduction mainly depends on damping materials and structures. Existing passive vibra...

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Problems solved by technology

Existing passive vibration-reduction and vibration-isolation bearings mainly use damping materials for vibration reduction, and use a single theory such as the principle of damping energy dissipation, local resonance, and elastic wave scattering to achieve passive vibration reduction and vibration isolation. There is a narrow band gap for low-frequency vibration isolation. , poor low-frequency vibration isolation effect, poor vibration attenuation effect at the excitation frequency, etc.

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