CN104141720B - A kind of square grid plate with isolation characteristics - Google Patents

Abstract

A kind of square grid plate with isolation characteristics, it relates to a kind of Turbogrid plates with isolation characteristics, to solve the problem that current cellular structure Turbogrid plates do not have vibration isolation, sound insulation property, it comprises covering, locally resonant type phonon crystal vibration isolation assembly and lower covering, upper covering is arranged in the top of lower covering, the locally resonant type phonon crystal vibration isolation assembly gluedd joint with the two is furnished with between upper covering and lower covering, described locally resonant type phonon crystal vibration isolation assembly is by transversely forming with longitudinal cycle equally distributed multiple locally resonant type phonon crystal unit, adjacent locally resonant type phonon crystal unit glueds joint, each locally resonant type phonon crystal unit is the regular prism structure that each side has local oscillator, local oscillator is the ring structure that inside and outside double-deck splicing is integrated, local oscillator is glued on locally resonant type vibration isolation phonon crystal regular prism framework matrix.The present invention is used for vibration isolation sound insulation.

Description

A square grid plate with vibration isolation properties

technical field

The invention relates to a vibration isolation plate with vibration isolation characteristics, belonging to the technical field of vibration isolation and noise reduction.

Background technique

Various vibration problems exist in the machinery industry and other industrial sectors. Vibration isolation (referred to as vibration isolation) is the most widely used vibration reduction technology in vibration control. Its essence is to add a subsystem between the vibration source and the system. (Vibration isolator), from an energy point of view, vibration isolation is to change the energy spectrum structure of the vibration source exciting the system to reduce the energy passing through the frequency to suppress vibration. An important feature of phononic crystals is their acoustic bandgap, that is, phononic crystals are functional materials or structures composed of two or more elastic media with periodic structure and elastic wave bandgap characteristics. When the elastic wave propagates in the phononic crystal, it is affected by its internal periodic structure to form a special band gap. The propagation of elastic waves in the bandgap frequency range is suppressed, so phononic crystals have broad application prospects in the field of vibration isolation.

However, the currently used honeycomb structure grid panels do not have the performance of vibration isolation and sound insulation, and cannot realize the function of vibration isolation and noise reduction.

Contents of the invention

The invention aims to solve the problem that the current honeycomb structure grid plate does not have the performance of vibration isolation and sound insulation, and further provides a square grid plate with vibration isolation characteristics.

The technical solution adopted by the present invention to solve the above technical problems is: a square grid plate with vibration isolation characteristics of the present invention includes an upper skin, a local resonance type phononic crystal vibration isolation component and a lower skin;

The upper skin is arranged above the lower skin, and a local resonance type phononic crystal vibration isolation component glued to the two is arranged between the upper skin and the lower skin. The local resonance type phononic crystal vibration isolation component It is composed of a plurality of local resonance phononic crystal units uniformly distributed along the horizontal and vertical periods, adjacent local resonance phononic crystal units are glued together, and each local resonance phononic crystal unit has a local The regular prism structure of the localized oscillator, the localized oscillator is a ring structure in which the inner and outer double layers are glued together, and the localized oscillator is glued on the regular prism frame matrix of the local resonance type vibration isolation phononic crystal unit.

The beneficial effects of the present invention are: 1. The present invention proposes a square grid plate composed of local resonance phononic crystals with vibration isolation and sound insulation performance, which realizes the lightweight design of the phononic crystal vibration damping structure , 60%-80% weight reduction. 2. The present invention can realize the isolation of the vibration in four directions of the square grid plate and the vibration perpendicular to the direction of the upper skin or the lower skin, can realize multi-directional vibration isolation and sound insulation, and can be widely used in various Manufacture of various platform structures such as precision instrument support tables, vibration isolation platforms, and sound insulation equipment in the field of home decoration and building materials.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention, Fig. 2 is a schematic diagram of the exploded structure of Fig. 1, and Fig. 3 is a schematic diagram of the three-dimensional structure of the local resonance type phononic crystal unit of the present invention.

detailed description

Specific Embodiment 1: In conjunction with Fig. 1-Fig. 3, a square grid plate with vibration isolation characteristics in this embodiment includes an upper skin 1, a local resonance type phononic crystal vibration isolation component 2 and a lower skin 4 ;

The upper skin 1 is arranged above the lower skin 4, and between the upper skin 1 and the lower skin 4 is arranged a local resonance type phononic crystal vibration isolation component 2 glued to the two. The sub-crystal vibration isolation component 2 is composed of a plurality of local resonance type phononic crystal units 3 uniformly distributed along the lateral and longitudinal periods, adjacent local resonance type phononic crystal units 3 are glued together, and each local resonance type acoustic The sub-crystal unit 3 is a regular prism structure with local oscillators 3-1 on each side. The local oscillator 3-1 is a ring structure with inner and outer double layers glued together. The local oscillator 3-1 is glued to the local resonance The vibration-isolation phononic crystal unit is on the regular prism frame substrate 3-2.

Embodiment 2: The local vibrator 3-1 in this embodiment is a regular polygon or circular ring structure in which the inner and outer double layers are glued together. With such arrangement, the structure is simple, the design is reasonable, and the practical needs are met. Others are the same as in the first embodiment.

Embodiment 3: The regular prism frame matrix 3-2 of the local resonance type vibration isolation phononic crystal unit of this embodiment is a cube, regular pentagonal prism or regular hexagonal prism frame matrix. Such arrangement has a simple structure and meets actual needs. Others are the same as in the first or second embodiment.

Embodiment 4: In conjunction with FIG. 3 , the inner layer structure 3-1-2 of the local vibrator 3-1 in this embodiment is made of lead or steel. Others are the same as in the third embodiment.

Embodiment 5: Referring to FIG. 3 , the outer layer structure 3-1-1 of the local vibrator 3-1 in this embodiment is made of nitrile rubber. With such setting, NBR has the characteristics of high wear resistance, good heat resistance and strong adhesive force, which meets the design requirements and actual needs. Others are the same as the specific embodiment 1, 2 or 4.

Embodiment 6: In conjunction with FIG. 3 , the regular prism frame base 3-2 of the local resonance type vibration isolation phononic crystal unit in this embodiment is made of aluminum or epoxy resin. With such an arrangement, the aluminum material is light in weight, cheap and easy to obtain; the epoxy resin has good physical and chemical properties, and it has excellent bonding strength to the surface of metal and non-metal materials, which meets actual needs. Others are the same as in the fifth embodiment.

Working process: the present invention can realize the vibration in four directions of the square grid plate and the vibration perpendicular to the skin direction, input through the upper skin 1, due to the band gap effect of the local resonance phononic crystal with pre-tightening force , so that the vibration excitation is attenuated within a certain frequency range of the phononic crystal vibration band gap, and finally the vibration is transmitted through the lower skin 4 after the vibration of the local resonance type phononic crystal vibration isolation component 2 is attenuated, so that This leads to the generation of a band gap, thereby realizing the function of multi-directional vibration and sound isolation.

Claims (6)

1. A square grid plate with vibration isolation characteristics, characterized in that: the grid plate comprises an upper skin (1), a local resonance type phononic crystal vibration isolation assembly (2) and a lower skin (4 ); The upper skin (1) is arranged above the lower skin (4), and a local resonance type phononic crystal vibration isolation component ( 2), the local resonance type phononic crystal vibration isolation component (2) is composed of a plurality of local resonance type phononic crystal units (3) uniformly distributed along the horizontal and vertical periods, and the adjacent local resonance type acoustic The sub-crystal units (3) are glued together, and each local resonance type phononic crystal unit (3) is a regular prism structure with local oscillators (3-1) on each side, and the local oscillators (3-1) are internal and external double The layers are glued together into a ring structure, and the local vibrator (3-1) is glued to the regular prism frame base (3-2) of the local resonance type vibration-isolation phononic crystal unit. 2. A square grid plate with vibration isolation characteristics according to claim 1, characterized in that: the local vibrator (3-1) is a regular polygon or a circular ring structure in which the inner and outer double layers are glued together . 3. A square grid plate with vibration isolation properties according to claim 1 or 2, characterized in that: the local resonance type vibration isolation phononic crystal unit regular prism frame base (3-2) is a cube, regular Pentaprism or regular hexagonal prism frame matrix. 4. A square grid plate with vibration isolation properties according to claim 3, characterized in that: the inner structure (3-1-2) of the local vibrator (3-1) is made of lead or steel. 5. A square grid plate with vibration isolation characteristics according to claim 1, 2 or 4, characterized in that: the outer structure (3-1-1) of the local vibrator (3-1) is D Sunny rubber material. 6. A square grid plate with vibration isolation properties according to claim 5, characterized in that: the local resonance type vibration isolation phononic crystal unit positive prism frame base (3-2) is made of aluminum or epoxy resin production.