Supercharge Your Innovation With Domain-Expert AI Agents!

A Local Resonance Superstructure Vibration Isolator

A local resonance and superstructure technology, applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problem that low-frequency and medium-high frequency resonance cannot be suppressed at the same time, and achieve enhanced damping and extended bandgap, The effect of high-efficiency vibration isolation

Active Publication Date: 2020-11-27
NAT UNIV OF DEFENSE TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a local resonance superstructure vibration isolator, which is used to overcome the defects of the prior art that the low-frequency and high-frequency resonance cannot be suppressed at the same time, and realize the suppression of resonance in the full frequency range; the invention also provides this local resonance A Nonlinear Method for Domain Resonance Superstructure Isolators

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Local Resonance Superstructure Vibration Isolator
  • A Local Resonance Superstructure Vibration Isolator
  • A Local Resonance Superstructure Vibration Isolator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] As shown in Figure 1(a) and Figure 1(b), an embodiment of the present invention provides a local resonance superstructure vibration isolator, including a bottom plate 4, an outer shell 3, a vibration isolation inner core 1 and a bearing platform 5; wherein The bottom plate 4 is used to provide installation and bearing support; the shell 3 is cylindrical, one end is open, and the other end has an end face; the open end is installed on the bottom plate 4; the end face has an opening; A plurality of elastic units 100 are arranged axially to form a periodic structure, and are located in the space surrounded by the bottom plate 4 and the housing 3; two adjacent elastic units 100 are fixedly connected, and each local resonance unit 200 includes a The spring mass system is fixed in the inner cavity of an elastic unit 100 and can vibrate in the inner cavity according to a predetermined frequency; the bearing platform 5 is stepped, and the large diameter section is installed on t...

Embodiment 1

[0060] Embodiment 1 is a linear / nonlinear superstructure vibration isolator with a single-frequency local resonance structure; Embodiment 2 is a superstructure vibration isolator with a dual-frequency coupled local resonance structure. The embodiment adopts the finite element numerical calculation method to verify their vibration isolation performance.

[0061] Figure 6 A two-dimensional plan view (section view, section through the central axis of the vibration isolator) of the vibration isolator in the preferred embodiment 2 is presented, and the main external design dimensions of the specific embodiment are marked in the figure. The structure of embodiment 1 and Figure 6 resemblance.

[0062] The material parameter of specific embodiment is as shown in the following table:

[0063] structure name material type Elastic Modulus Poisson's ratio Density kg / m 3

Rigid Laminates(6) Stainless steel 200GPa 0.3 7890 Heavy Blocks (9, 11, 14) ...

Embodiment 2

[0069] Example 2: Superstructure Vibration Isolator Containing Dual Frequency Coupling Local Resonance Structure

[0070] Embodiment 2 compares and analyzes two groups of different dual-frequency coupling local resonant structures, and their local resonant frequencies are different. The low-frequency local resonance modes of the two oscillators calculated by the finite element method are as follows: Figure 10 As shown in (a) and 10(b), the first mode corresponds to the resonance of the third weight 14 , and the second mode corresponds to the resonance of the second weight 11 .

[0071] In the first group: f 21 =53Hz, f 22 = 180 Hz; theoretically estimated local resonant bandgap frequencies range from 53-68 Hz and 180-236 Hz.

[0072] In the second group: f 21 =137Hz, f 22 = 373Hz; theoretically estimated local resonance bandgap frequencies range from 137-176Hz and 373-490Hz.

[0073] Under the action of 1 ton load, the vibration transmission rate comparison of the two g...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a locally resonant superstructure vibration isolator comprising a bottom plate, a shell, a vibration isolation inner core and a bearing platform. The bottom plate is used for providing installing and bearing support. The shell is tubular, one end of the shell is open, and the other end of the shell is provided with an end face. The open end of the shell is installed on thebottom plate. The end face is provided with an opening. A plurality of elastic units are arranged in the axial direction of the shell, and a periodic structure is formed and is located in a space defined by the bottom plate and the shell. Every two adjacent elastic units are fixedly connected. Each locally resonant unit comprises a spring quality system and is fixed in an inner cavity of one corresponding elastic unit and can vibrate in the inner cavity according to preset frequency. The bearing platform is in a step shape. The large-diameter section is installed on the vibration isolation inner core, a small-diameter section stretches out from the opening of the end face of the shell, and the diameter of the large-diameter section is larger than that of the opening of the end face of theshell. The problem that in the prior art, full-frequency-domain vibration isolation cannot be achieved is solved, and full-frequency vibration absorption is achieved.

Description

technical field [0001] The invention relates to the technical field of vibration isolators, in particular to a superstructure vibration isolator with a local resonance structure. Background technique [0002] Fatigue, fracture and other damage caused by structural vibration seriously affect the safety and reliability of the structure. Vibration radiation and noise pollute the environment and endanger the physical and mental health of personnel. Vibration isolators are important damping components that hinder vibration transmission. They are widely used in engineering structures such as ships, high-speed trains, railways, subways, and buildings, and can effectively improve the vibration and noise suppression performance of structures. Various engineering applications not only require the vibration isolator to have low-frequency vibration isolation performance, but also require it to have the ability to suppress broadband resonance, and at the same time require it to have good...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/108F16F7/116
CPCF16F7/108F16F7/116
Inventor 方鑫郁殿龙温激鸿
Owner NAT UNIV OF DEFENSE TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com