A Local Resonance Type Building Vibration Isolation Foundation

A local resonance and architectural technology, applied in the direction of architecture, building types, building components, etc., can solve the problem of difficulty in micron-level small-amplitude vibration control

Active Publication Date: 2022-04-12
CHINA RAILWAY DESIGN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a local resonance type building vibration isolation foundation in view of the difficulty in controlling micron-level small-amplitude vibrations in the prior art

Method used

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  • A Local Resonance Type Building Vibration Isolation Foundation
  • A Local Resonance Type Building Vibration Isolation Foundation
  • A Local Resonance Type Building Vibration Isolation Foundation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A local resonance type building vibration isolation foundation, the local resonance type building vibration isolation foundation is a topological structure composed of local resonance wave resistance units 1 through adjacent topologies, and the local resonance type wave resistance units 1 It is a block unit with three orthogonal directions close in size or a beam unit with two directions close in size and a third direction much larger than the other two directions. The topological structure is the local resonance type wave resistance unit 1 Topology along three dimensions: unidirectional, planar, or spatial. The local resonance type building vibration isolation foundation not only has bearing capacity, but also has the effect of isolating 6 Hz ultra-low frequency micro-vibration, and can cover the main mode frequency of the building structure.

[0046] The local resonance type wave resistance unit 1 is sequentially composed of a rigid core 1-1, an elastic wrapping layer...

Embodiment 2

[0055] This embodiment is a specific implementation of Embodiment 1, a local resonance type building vibration isolation foundation, which is composed of a prefabricated local resonance type wave resistance unit 1 through topology design, and the local resonance type wave resistance unit 1 can be designed as a cube ( figure 1 , that is block unit) or cuboid ( figure 2 , that is, the beam element). The local resonance type wave resistance unit 1 is sequentially composed of a rigid core 1-1, an elastic wrapping layer 1-2, and a bearing outer frame 1-3 from the inside to the outside, and the rigid core 1-1 is made of cast iron. Material parameters: elastic modulus 210000MPa, density 7800kg / m 3 , Poisson's ratio 0.275; the elastic wrapping layer 1-2 adopts rubber material, material parameters: modulus of elasticity 0.137MPa, density 1300kg / m 3 , Poisson's ratio 0.463; the bearing capacity outer frame 1-3 is made of concrete material, material parameters: elastic modulus 30000M...

Embodiment 3

[0058] This embodiment adopts the prefabricated beam unit of Embodiment 2, and the vibration isolation foundation of the local resonance type building is carried out by the local resonance type wave resistance unit 1 along the horizontal direction and the vertical direction of vibration propagation to perform periodic topology in the plane direction, such as Figure 7-Figure 8 As shown, it is placed under the building. Specifically, the number of topological periods and the value of the L dimension in the local resonance type wave resistance unit 1 depend on the size of the building. If necessary, the vibration isolation foundation of the local resonance type building needs to be extended beyond the building facade by no less than 0.5m . According to the above structure, it can be formed Figure 9 The forbidden band distribution. Depend on Figure 9 It can be seen that under the action of the local resonance type building vibration isolation foundation in this embodiment, t...

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Abstract

The invention discloses a local resonance type building vibration isolation foundation. The building vibration isolation foundation is topologically constituted by local resonance type wave resistance units along a single direction, a plane direction or a space direction. The local resonance type wave resistance From the inside to the outside, the unit consists of a rigid core, an elastic wrapping layer, and a load-bearing outer frame. The invention adopts the bandgap theory of local resonance phononic crystals to specially design the building foundation, changes the structural geometric size and material composition, and can realize the active adjustment and control of the bandgap and vibration isolation frequency bands. While realizing the bearing function, Achieve micro-vibration control goals.

Description

technical field [0001] The invention relates to the technical field of micro-vibration control of precision instruments, in particular to a local resonance type building vibration isolation foundation. Background technique [0002] With the acceleration of urbanization, the vibration generated by urban road traffic, subway train operation and building construction seriously affects the normal use of surrounding precision instruments and equipment. If this contradiction is not resolved, it will directly lead to huge economic and social losses, and may cause some Abnormal processing of core components of high-tech products, such as chips and large-scale integrated circuits, restricts the development of high-tech industries such as biological sciences, electron optics, and precision machining, and affects the vitality of ships and spacecraft. The vibration that affects the use of precision instruments is usually called micro-vibration, mainly because after the vibration is tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D27/34E04B1/00E04B1/98E04H9/02
CPCE02D27/34E04B1/0007E04B1/98E04H9/021E04H9/022
Inventor 姜博龙刘冀钊胡文林王少林何宾齐春雨
Owner CHINA RAILWAY DESIGN GRP CO LTD
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