Unlock instant, AI-driven research and patent intelligence for your innovation.

Detachable multi-order resonance track roadbed dynamical vibration absorption combined body

A technology of dynamic vibration reduction and assembly, applied in the track field, to achieve the effect of reducing low-frequency noise radiation, simple and easy to implement, and convenient for maintenance and replacement

Active Publication Date: 2017-06-27
SHANGHAI UNIV OF ENG SCI
View PDF10 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a method that can effectively solve the complex multi-band actual vibration and noise radiation problems that are difficult to solve by traditional single effective vibration reduction measures in track vibration reduction and noise reduction. The detachable multi-order resonant track bed dynamic vibration damping combination

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
  • Detachable multi-order resonance track roadbed dynamical vibration absorption combined body
  • Detachable multi-order resonance track roadbed dynamical vibration absorption combined body
  • Detachable multi-order resonance track roadbed dynamical vibration absorption combined body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1 - subway application:

[0069] This embodiment is aimed at the operating conditions of the subway: the vehicle speed range is 40-100km / h, the distance between the fasteners is 0.55-0.65m, the stiffness of the fasteners is 5-50kN / mm, and the minimum wheelbase is 2-3m.

[0070] Such as Figure 16 Said, track bed plate 5 is provided with sleeper 81, and rail 8 is arranged on sleeper 81, and subway car body 7 runs on rail 8, and wheel 72 is set under the bogie 71 of car body 7, two wheels 72 pieces of same bogie 71 The wheelbase 10 is a, the distance between adjacent bogies 9 is b, and the distance between rail supports 11 is l.

[0071] Figure 16 A simple schematic diagram is given for each frequency listed in Equations 1-3

[0072] Excitation frequency f through wheelbase ea =υ / a Eq(1a)

[0073] The excitation frequency f of the train passing the rail support spacing es =υ / l Eq(1b)

[0074] Bogie passing frequency f eb =υ / b

[0075] Here v is the vehic...

Embodiment 2

[0098] Example 2 - Intercity Railway Application

[0099] The operating conditions of the intercity railway are as follows: the vehicle speed range is 100-200km / h, the fastener spacing is 0.55-0.65m, the fastener stiffness is 10-50kN / mm, and the minimum wheelbase is 2-3m. From this the following frequency ranges can be calculated:

[0100] Train passing excitation frequency: 40-100Hz;

[0101] Rail support natural frequency P2 frequency range: 30-60Hz;

[0102] Therefore, the actual design resonant frequency range considered is 30-100Hz.

[0103] In this example, the 6th-order center frequency is used for resonance design, and the installation includes 3 rail travel cover assembly 1 with two resonant units. Each second-order resonant frequency is realized by vertical and transverse resonant modes, such as figure 2 The vertical resonance direction 33 of the multi-order resonance unit and the horizontal resonance direction 34 of the multi-order resonance unit are shown. The ...

Embodiment 3

[0106] Example 3: High-speed rail application

[0107] The high-speed rail operating conditions are as follows:

[0108] The vehicle speed range is 250-350km / h, the fastener spacing is 0.55-0.65m, the fastener stiffness is 10-50kN / mm, and the minimum wheelbase is 2-3m. From this, the following frequency range can be calculated:

[0109] Train passing excitation frequency: 100-160Hz; rail support natural frequency P2 frequency range: 30-60Hz

[0110] Therefore, the actual design resonance frequency range considered is 30-160Hz

[0111] In this example, the fourth-order center frequency is used for resonance design, and the track walking cover assembly 1 including two second-order resonance units is installed. The design resonance center frequencies of each resonance unit are 31.5Hz and 125Hz; and 63Hz and 160Hz, respectively. The two-order resonant center frequency is achieved by the resonant unit vertically and laterally respectively, such as figure 2 The vertical resonanc...

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 relates to a detachable multi-order resonance track roadbed dynamical vibration absorption combined body. A cover plate combined body (1) comprises more than two multi-order resonance units (2); each multi-order resonance unit (2) comprise more than two resonance mass bodies (3) with stiffness-mass ratio of not less than two modals and resonance elastic elements (4); the multi-order resonance units (2) are placed in a track direction according to a combination of more than two multi-order resonance units; the multi-order resonance units (2) are fixed on a roadbed slab (5) through constrained elastic anchoring pieces (6); and the equivalent stiffness of each constrained elastic anchoring piece (6) is less than the minimum resonance stiffness of each multi-order resonance unis (2). Compared with the prior art, the detachable multi-order resonance track roadbed dynamical vibration absorption combined body has the advantages that multi-order resonance frequency comprises a multi-order excitation frequency under a vehicle running condition and a fixed characteristic frequency of a track structure under a vehicle load condition; therefore, problems of complicated multi-frequency band actual vibration and noise radiation, which are very hard to solve by the traditional single vibration absorption measure, in the track vibration absorption and noise reduction are solved; in particular a problem of roadbed structure low frequency vibration caused by a track vibration isolation system is also solved.

Description

technical field [0001] The invention belongs to the field of track technology, and in particular relates to a detachable multi-stage resonant track bed dynamic damping assembly. Background technique [0002] Prefabricated track bed slabs have been widely used in the construction of various lines of rail transit in my country. After the improvement of various domestic research institutions and the improvement of the production process, there have been many deformations. However, its basic structure is still a solid slab and a hollow frame track bed slab in the middle, and the bottoms of the rails on both sides are continuous solid bodies. [0003] In the combined frame bed plate described in Chinese patent ZL201110102334.6, in order to facilitate the disassembly of the track bed plate and the replacement of the bottom vibration isolation pad, a lifting mechanism is added in the hollow center. During use, a drainage ditch can be arranged at the center of the ballast bed foun...

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 Applications(China)
IPC IPC(8): E01B19/00
CPCE01B19/003
Inventor 王安斌
Owner SHANGHAI UNIV OF ENG SCI