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A study on bearing characteristic and failure mechanism of thin-walled structure of a prefabricated subway

Lianjin TAO; Cheng SHI; Peng DING; Sicheng LI; Shang WU; Yan BAO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3, Pages 359-377 doi: 10.1007/s11709-022-0816-2

Abstract: In order to study the bearing performance of a new type of prefabricated subway station structure (PSSSSecondly, the bearing mechanism of a PSSS was investigated in detail.The results showed that this new type of the PSSS had good bearing capacity.The top arch structure was a three-hinged arch bearing system, and the enclosure structure and the substructuredamages to the spandrel, hance, arch foot, and enclosure structure was the main reason of its loss of bearing

Keywords： prefabricated subway station thin-walled components finite element analysis bearing characteristic

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New Formulas for the Static Characteristic of Hydrostatic Bearing and Their Application

Meng Xinzhai,Yang Jianxi,Meng Zhaoyan

Strategic Study of CAE 2002, Volume 4, Issue 5, Pages 63-66

Abstract:

In this paper, the traditional hydrostatic characteristic formulas of hydrostatic bearing, or slideAt the same time, new formulas for hydrostatic characteristic of bearing are presented .Using new formulasto design and calculate the parameters of hydrostatic bearing may got exact results quickly and efficientlyformulas can reflect the nonlinear relation between the static load forced on the axle neck and the bearing

Keywords： hydrostatic bearing traditional restrictor new variable restrictor static characteristic

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Characteristic Analysis for Journal Bearing Under Thin Film Lubrication

Qu Qingwen,Chai Shan,Yao Fusheng

Strategic Study of CAE 2003, Volume 5, Issue 6, Pages 44-48

Abstract:

The characteristic of the bearing under thin film lubrication is far different to that of conventionalcalculation bearing.An equivalent viscosity corrected model is applied to analyze characteristic of journal bearing in thisFor infinite width bearing, an analysis equation on pressure distribution is gained.Then, the properties of journal bearing are calculated accurately.

Keywords： thin film lubrication equivalent viscosity journal bearing

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New Formulas of Dynamic Characteristic of Hydrostatic Bearing and Its Testified Experiment

Meng Xinzhai,Yang Jianxi,Meng Zhaoyan

Strategic Study of CAE 2003, Volume 5, Issue 3, Pages 62-66

Abstract:

Hydrostatic bearing has many advantages, such as high accuracy of movement, low power consumptionof friction, small deflection of bearing center, high capacity of load-carrying, powerful absorptionAccording to mechanic balance and flow continuity, the transfer function of hydrostatic bearing systemThe bearing clearance of hydrostatic bearing with new variable, restrictor can be controlled in constantBut the clearance of hydrostatic bearing with constant restrictor may be changed into little clearance

Keywords： dynamic properties transfer functions dynamic stiffness resonance frequency hydrostatic bearing

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Numerical analysis on uplift bearing characteristic of cast in situ DX pile

Chen Lihong,Zhang Qinglin,Yuan Xiyu

Strategic Study of CAE 2012, Volume 14, Issue 1, Pages 31-36

Abstract:

This paper analyzes DX single pile with 2 bearing plates on its resistanceaxial force of DX pile are obtained,and the conclusions based on the analysis are drawn.The uplift bearingcapacity of DX single pile is about more than twice larger than that of the normal single pile and its bearingplates work out from the upper to the lower order, while when the bearing capacity reaches certain level

Keywords： DX pile uplift bearing capacity numerical analysis

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Study on load bearing characteristic of cast in situ DX group pile with numerical analysis

Zhang Qinglin,Chen Lihong

Strategic Study of CAE 2012, Volume 14, Issue 1, Pages 51-59

Abstract: types of group-pile which contains 4 piles with spacing 1.5D, 2D, 2.5D and 3D（D is diameter of the bearingmain conclusions are: group pile effect of DX pile increases sharply when pile spacing decreases；the bearingincreases from 1.5D to 3D；the maximum value of settlement of soil among group-pile occurs between two bearing

Keywords： DX pile group-pile settlement numerical analysis

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Analysis of the dynamic hysteresis characteristic of finger seal

LEI Yanni, CHEN Guoding

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1, Pages 32-36 doi: 10.1007/s11465-007-0005-y

Abstract: The research about hysteresis characteristic of finger seal (FS), which was carried out based on theA mass spring damper dynamics model of FS system was proposed and the hysteresis characteristic of theThis work shows that the dynamics characteristic analysis of the FS is necessary and the dynamics model

Keywords： FS necessary hysteresis characteristic optimization spring

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Iterative HOEO fusion strategy: a promising tool for enhancing bearing fault feature

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0725-z

Abstract: techniques, the energy operator (EO) and its variants have received considerable attention in the field of bearingTo address these issues, this paper presents a novel EO fusion strategy for enhancing the bearing faultand experimental verifications confirm that the proposed strategy is more effective for enhancing the bearing

Keywords： higher order energy operator fault diagnosis manifold learning rolling element bearing information

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Flow characteristic and wastewater treatment performance of a pilot-scale airlift oxidation ditch

Hongtao PANG, Hanchang SHI, Huiming SHI,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4, Pages 470-476 doi: 10.1007/s11783-009-0143-z

Abstract: diffuser and baffle as aerator was operated in a wastewater treatment plant (WWTP) to investigate its flow characteristic

Keywords： airlift oxidation ditch flow characteristic wastewater treatment

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New analysis model for rotor-bearing systems based on plate theory

Zhinan ZHANG, Mingdong ZHOU, Weimin DING, Huifang MA

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4, Pages 461-473 doi: 10.1007/s11465-019-0525-2

Abstract: The purpose of this work is to develop a new analysis model for angular-contact, ball-bearing systemsThe new analysis model is suitable for static and modal analyses of rotor-bearing systems.

Keywords： rotor-bearing system rolling element bearing plate theory finite element analysis

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Weak characteristic information extraction from early fault of wind turbine generator gearbox

Xiaoli XU, Xiuli LIU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 357-366 doi: 10.1007/s11465-017-0423-4

Abstract:

Given the weak early degradation characteristic information during early fault evolution in gearboxA weak characteristic information extraction based on µ-SVD and local mean decompositionExperimental results show that this method can significantly weaken signal noise, effectively extract the weak characteristic

Keywords： wind turbine generator gearbox µ-singular value decomposition local mean decomposition weak characteristic

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API-based assessment on urban air environment bearing capability in China

Jinnan WANG,Jing ZHANG,Hongqiang JIANG,Yaling LU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6, Pages 1049-1055 doi: 10.1007/s11783-014-0662-0

Abstract: By using this new method, the air environmental bearing capability of 333 cities at the prefecture levelThe results show that of the 333 cities 9.6% is of high bearing capability, 34.5% relatively high bearingcapability, 52.6% medium bearing capability, 2.7% low capability, and 0.6% is of weak bearing capability; in terms of regional distribution, the western region is of relatively high air environment bearingChengdu-Chongqing agglomerations are of relatively high carrying capacity while other agglomerations are of medium bearing

Keywords： air pollution index (API) air environment bearing capability key city assessment method

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The convexity about ultimate bearing hypersurfaces of structures

Chengxi GUO,Tingting GUO

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4, Pages 456-461 doi: 10.1007/s11709-016-0334-1

Abstract: The relationship between the convexity on the ultimate bearing surface of a structure and the second-orderHessian matrix composed of the second-order partial derivatives on the hypersurface about the ultimate bearingSome applications in the analysis of bearing capacity of structures were illustrated with examples.The study shows that an evaluation about the bearing capacity state of a complex structure can be madeon the basis of several points on the surface of the ultimate bearing of the structure.

Keywords： service limit load ultimate bearing surface convexity generalized force generalized displacement frame

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Foundations bearing capacity subjected to seepage by the kinematic approach of the limit analysis

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4, Pages 446-455 doi: 10.1007/s11709-013-0227-5

Abstract: The kinematic approach of the limit analysis was employed to find the upper-bound limit of the bearingIt was found that the bearing capacity has a decreasing trend with increase in the groundwater flow gradientand hence, a reduction factor has been introduced to the third term in the bearing capacity equation

Keywords： foundation bearing capacity limit analysis numerical computation plasticity seepage

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Undrained seismic bearing capacity of strip footing adjacent to a heterogeneous excavation

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 566-583 doi: 10.1007/s11709-023-0905-x

Abstract: The analysis of the bearing capacity of strip footings sited near an excavation is critical in geotechnicseffects of the geometrical features of the excavation and the soil strength properties on the seismic bearingDesign charts and tables were produced to clarify the relationship between the undrained seismic bearing

Keywords： excavation finite element limit analysis heterogeneous soil strip footing undrained bearing capacity