scholarly journals Bogie Frame Structure Evaluation for Light-Rail Transit (LRT) Train: A Static Testing

2021 ◽  
Vol 4 (1) ◽  
pp. 36-43
Author(s):  
Djoko Wahyu Karmiadji ◽  
Budi Haryanto ◽  
Ogi Ivano ◽  
Mustasyar Perkasa ◽  
Abdul Rohman Farid
Keyword(s):  
Maximum Stress ◽  
Load Test ◽  
Frame Structure ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Element Analysis ◽  
Bogie Frame ◽  
Static Testing ◽  
Structure Evaluation

A new bogie frame of Light-Rail Transit (LRT) is having its strength of structure verified with experimental static testing according to EN 13749 standards. Static testing of bogie frame structure of LRT is performed by using a combination of seven tensile and compression loads that comprise of operational loads (normal service) and over-loads (exceptional service). Measurement parameters of bogie frame are strain and deflection values. The strain and deflection values resulted at every step of the load test were measured and monitored to further be used as analytic data. This data is then compared to the stress data of finite element analysis to check its deviation value. Testing results show the maximum stress value is 81.48 MPa on operational load, meanwhile, for exceptional load case, maximum stress is 120.96 MPa and deflection value is 1.25 mm. The maximum stress value is still below yield strength of bogie frame material S 555J2 (y=355 MPa). According to testing data, structure of bogie frame LRT fulfill as the acceptance criteria.

scholarly journals Optimalisasi Desain Struktur Bogie Las Light Rail Transit (LRT) Menggunakan Perhitungan Finite Elemen Method (FEM)

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Mustasyar Perkasa ◽  
Wahyu Sulistiyo
Keyword(s):  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Bogie Frame

Kegiatan penelitian ini bertujuan untuk meningkatkan faktor keamanan bogie las lokomotif yang telah ada. Sasaran kegiatan penelitian ini yaitu didapatkannya desain optimal dari bogie las tersebut dengan cara rekayasa geometri dan struktur sehingga didapatkan efek penguatan. Dari hasil pengujian struktur bogie las frame lokomotif DH, struktur bogie frame masih perlu dilakukan penguatan karena pada saat pengujian statis tegangan maksimum yang terjadi hampir mendekati tegangan luluh materialnya. Untuk itu perlu dilakukan redesain untuk bogie frame dengan rekayasa geometri dalam bentuk penguatan pada struktur framenya. Penambahan penguatan ini akan di simulasikan dengan menggunakan sofware finite elemen method (FEM). Tujuannya dilakukan analisa kekuatan struktur bogie las frame lokomotif DH adalah untuk memastikan disain bogie las frame baru memenuhi standar keamanan sebelum melalui proses pengujian, atau sering disebut sebagai tahap verifikasi disain yang selanjutnya disain bogie frame ini dijadikan sebagai salah satu alternatif disain.

Comparison of the Strength Analysis about Single Bogie Frame and its in the Assembly

2014 ◽  
Vol 705 ◽  
pp. 87-91
Author(s):  
Quan Xian Wang ◽  
Qi Hui Dai ◽  
Jing Jie Sun ◽  
Wei Hong Wu
Keyword(s):  
Maximum Stress ◽  
Mechanical Performance ◽  
Load Condition ◽  
Frame Structure ◽  
Strength Analysis ◽  
Element Analysis ◽  
Bogie Frame ◽  
Permissible Stress ◽  
Strength Tests ◽  
Structure Strength

To take The CRH3 EMU bogie frame as the research object, aiming at the characteristic and mechanical performance of bogie frame, the 3D model of CRH3 bogie frame based on PRO/E are established. According to the standard TB/T 2368-2005 Motive power bogie frame structure strength tests, the load condition is defined. The strength analysis by finite element analysis software ANSYS are carried out in the bogie and single frame . The analysis results show that the maximum stress value of the selected node is less than the permissible stress in both cases, the strength analysis result of the bogie frame is more credible because the load processing is more close to the actual stress.

scholarly journals From “Big Small Town” to “Small Big City”: Resident Experiences of Gentrification along Waterloo Region’s LRT Corridor

2021 ◽  
pp. 0739456X2199391
Author(s):  
Margaret Ellis-Young ◽  
Brian Doucet
Keyword(s):  
Statistical Analysis ◽  
Strong Evidence ◽  
Small Town ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Big City ◽  
Waterloo Region

Most studies of transit-induced gentrification rely on statistical analysis that measures the extent to which gentrification is occurring. To extend and enhance our knowledge of its impact, we conducted sixty-five interviews with residents living along the light rail transit (LRT) corridor in Waterloo Region, Ontario, Canada, shortly before the system opened. There was already strong evidence of gentrification, with more than $3 billion (Canadian dollars) worth of investment, largely in condominiums, before a single passenger was carried. In line with contemporary critical conceptualizations of gentrification, our interviews identified new and complex psychological, phenomenological, and experiential aspects of gentrification, in addition to economic- or class-based changes.

A simplified iterative approach for testing the pulse derailment of light rail vehicles across a viaduct to near-fault earthquake scenarios

2021 ◽  
pp. 095440972098741
Author(s):  
Ling-Kun Chen ◽  
Peng Liu ◽  
Li-Ming Zhu ◽  
Jing-Bo Ding ◽  
Yu-Lin Feng ◽  
...  
Keyword(s):  
Ground Motions ◽  
Simulation Software ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Seismic Responses ◽  
Near Fault ◽  
Rail Vehicle ◽  
Pulse Type ◽  
The Impact

Near-fault (NF) earthquakes cause severe bridge damage, particularly urban bridges subjected to light rail transit (LRT), which could affect the safety of the light rail transit vehicle (“light rail vehicle” or “LRV” for short). Now when a variety of studies on the fault fracture effect on the working protection of LRVs are available for the study of cars subjected to far-reaching soil motion (FFGMs), further examination is appropriate. For the first time, this paper introduced the LRV derailment mechanism caused by pulse-type near-fault ground motions (NFGMs), suggesting the concept of pulse derailment. The effects of near-fault ground motions (NFGMs) are included in an available numerical process developed for the LRV analysis of the VBI system. A simplified iterative algorithm is proposed to assess the stability and nonlinear seismic response of an LRV-reinforced concrete (RC) viaduct (LRVBRCV) system to a long-period NFGMs using the dynamic substructure method (DSM). Furthermore, a computer simulation software was developed to compute the nonlinear seismic responses of the VBI system to pulse-type NFGMs, non-pulse-type NFGMs, and FFGMs named Dynamic Interaction Analysis for Light-Rail-Vehicle Bridge System (DIALRVBS). The nonlinear bridge seismic reaction determines the impact of pulses on lateral peak earth acceleration (Ap) and lateral peak land (Vp) ratios. The analysis results quantify the effects of pulse-type NFGMs seismic responses on the LRV operations' safety. In contrast with the pulse-type non-pulse NFGMs and FFGMs, this article's research shows that pulse-type NFGM derail trains primarily via the transverse velocity pulse effect. Hence, this study's results and the proposed method can improve the LRT bridges' seismic designs.

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