Search

In order to study the vibration control effects of floating rail fasteners on the metro depot and its over-track buildings, a metro depot and its over-track buildings are selected for field test and the track-stratum-operation depot-platform coupling finite element calculation model is established and verified by the measured vibration response data. The track-stratum-operation depot-platform-buildings coupling large-scale dynamic finite element analysis model is established based on the extension of the former, and the reaction forces of ordinary fasteners and floating rail fasteners are input into the model respectively to solve the vibration responses of the over-track buildings and analyze the insertion loss of vibration level varying with frequency and maximum Z vibration level in order that the effects of floating rail fasteners on the vibration control of the over-track buildings are evaluated. The research shows that for the building forms studied in this paper, the significant vibration frequency of building floor is 31. 5 Hz when the vibration propagates to the over-track buildings through the depot and the over-track platform. The floating rail fastener has few obvious effects on vibration control at the vibration significant frequency 31. 5 Hz of this over-track buildings, mainly because its stable vibration reduction frequency band occurs above 31.5 Hz. The control effects are optimal near 63 Hz, and the maximum vibration reduction of 15 dB can be achieved. With the floating rail fasteners, the maximum Z vibration level of the over-track building floor generally decreases by 2-5 dB. The research results of this paper can provide reference and basis for the selection and design of damping track for the vibration control of the depot and over-track buildings. [ABSTRACT FROM AUTHOR]

Copyright of Foundry Technology (1000-8365) is the property of Foundry Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Railway Standard Design is the property of Railway Standard Design Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Vibration damping fastener is an important means for vibration and noise reduction in urban rail transit. At present, a common type of double-layer nonlinear vibration damping fastener has such problems as large consumables and high installation height. In this paper, a design scheme for a double-layer nonlinear vibration damping fastener is provided by means of structural design, simulation analysis and indoor test, which can effectively overcome the defects existing in a certain type of fastener. After indoor drop hammer test, the vibration reduction effect reaches 8. 9 dB. The Fatigue test indicates that the vertical stiffness of the system is 17 kN/mm, which meets the requirements of medium vibration damping stiffness. The traffic safety analysis shows that the derailment coefficient is low and meets the safety requirements. It is thus ensured that the fastener satisfies the requirements of medium vibration reduction fasteners and can be used for medium vibration reduction tracks of urban rail transit. [ABSTRACT FROM AUTHOR]

Copyright of Railway Construction Technology is the property of Railway Construction Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Railway Investigation & Surveying is the property of Railway Investigation & Surveying Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Railway Standard Design is the property of Railway Standard Design Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Railway Standard Design is the property of Railway Standard Design Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The hollow flange beam (HFB) is a particular cross section with two torsion rigid closed triangular flanges and a comparatively flexible web, and it is a type of high efficient cross section. This paper presents two kinds of new cold-formed flange-closed welded sections named HF1 and HF2 through change the section component and parameters of HFB. Based on the precise finite element model, nonlinear finite element method is adopted to study the static behaviors including buckling modes, deformed process, load carrying capacity and stiffness of two new kinds of section members under axial compression, bend and component axial compression-bend loads. The two new kinds of section members have some superior static behaviors including higher mean section stress and modulus of the member and have no local buckling phenomena in the elements are proofed under axial compression, and have the well characteristic of high rigidity, high ultimate capacity, local buckling of the sections always hard to occur and correlation curves replete under bend and component axial compression-bend loads, too. The new cold-formed flange-closed welded section members can go deep into the experiment study as to be used in the practical engineering. [ABSTRACT FROM AUTHOR]