ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004最新文献

{"title":"Wheel wear management on high-speed passenger rail: a common playground for design and maintenance engineering in the Talgo engineering cycle","authors":"Fernando Pascual, Jose-Antonio Marcos","doi":"10.1115/RTD2004-66033","DOIUrl":"https://doi.org/10.1115/RTD2004-66033","url":null,"abstract":"Talgo's focus on engineering excellence has helped the group to deliver innovative rail products to the market since 1942. Patentes Talgo S.A. (PTSA) provides passenger rail administrations around the world with high-speed cars and locomotives, car maintenance equipment and maintenance services. The paper outlines the US experience of Talgo's total logistics care (TLC) maintenance program, summarizing Talgo's maintenance approach, practice and overall results. The preventive and corrective maintenance program, the continuous trainset monitoring and the maintenance and design engineering cycle is covered among other topics. Rolling assembly maintenance and wheel wear management are the two focal points of this paper. Talgo's rolling assembly design has evolved over 60 years taking full advantage of the design-maintenance engineering cycle. Maintenance engineers and technicians, wheel assembly design engineers and maintenance equipment design engineers work together on a daily basis to improve the design of the rolling assembly and reduce maintenance costs and wheel wear. Enhanced guidance systems and other design improvements help to reduce flange wear on independent axle wheelsets. Also, five decades of in-house maintenance and wheel turning experience using Talgo pit lathes revealed the cutting parameters and frequencies to maximize wheel life. Both wheel wear management design and maintenance practices is reviewed in the paper.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126215685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Suspension dynamics and design optimization of a high speed railway vehicle","authors":"K. Nishimura, N. Perkins, Weiming Zhang","doi":"10.1115/RTD2004-66029","DOIUrl":"https://doi.org/10.1115/RTD2004-66029","url":null,"abstract":"The design of suspension systems for high-speed railway vehicles involves the simultaneous consideration of those requirements as suspension packaging, ride quality, stability, and cost. A design strategy is presented in this paper that enables an optimal design with respect to these competing requirements. The design strategy consists of four steps including the development of a lumped parameter vehicle model, the determination of vehicle parameters, the formulation of a design objective, and the minimization of the objective to optimize key suspension parameters. The design objective captures vehicle requirements including ride quality, suspension packaging, and wheel/rail holding. Power spectral densities (PSDs) are computed for the vertical vehicle body acceleration, suspension travel and dynamic wheel/rail interaction. The design objective function is calculated based on these PSDs and minimized to yield an optimum. An example suspension design is proposed that improves vehicle ride quality and wheel/rail holding without sacrificing other requirements.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126091546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact test of a crash-energy management passenger rail car","authors":"K. Jacobsen, D. Tyrell, B. Perlman","doi":"10.1115/RTD2004-66045","DOIUrl":"https://doi.org/10.1115/RTD2004-66045","url":null,"abstract":"On December 3, 2003, a single-car impact test was conducted to assess the crashworthiness performance of a modified passenger rail car. A coach car retrofitted with a crash energy management (CEM) end structure impacted a fixed barrier at approximately 35 mph. This speed is just beyond the capabilities of current equipment to protect the occupants. The test vehicle was instrumented with accelerometers, string potentiometers, and strain gages to measure the gross motions of the car body in three dimensions, the deformation of specific structural components, and the force/crush characteristic of the impacted end of the vehicle. The CEM crush zone is characterized by three structural components: a pushback coupler, a sliding sill (triggering the primary energy absorbers), and roof absorbers. These structural mechanisms guide the impact load and consequent crush through the end structure in a prescribed sequence. Pre-test activities included quasi-static and dynamic component testing, development of finite element and collision dynamics models and quasi-static strength tests of the end frame. These tests helped verify the predicted structural deformation of each component, estimate a force-crush curve for the crush zone, predict the gross motions of the car body, and determine instrumentation and test conditions for the impact test. During the test, the passenger car sustained approximately three feet of crush. In contrast to the test of the conventional passenger equipment, the crush imparted on the CEM vehicle did not intrude into the passenger compartment. However, as anticipated the car experienced higher accelerations than the conventional passenger car. Overall, the test results for the gross motions of the car are in close agreement. The measurements made from both tests show that the CEM design has improved crashworthiness performance over the conventional design. A two-car test is performed to study the coupled interaction of CEM vehicles as well as the occupant environment. The train-to-train test results are expected to show that the crush is passed sequentially down the interfaces of the cars, consequently preserving occupant volume.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122464107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of colliding vehicle interactions for the passenger rail train-to-train impact test","authors":"R. Stringfellow, R. Rancatore, P. Llana, R. Mayville, MA Associates Newton, Eloy Martinez","doi":"10.1115/RTD2004-66037","DOIUrl":"https://doi.org/10.1115/RTD2004-66037","url":null,"abstract":"A full-scale train-to-train impact test was performed in which a cab car-led passenger train traveling at 30 mph collided with a standing locomotive-led train. During the test, the lead cab car overrode the cab of the standing locomotive, sustaining approximately 20 feet of crush, while the cab of the locomotive remained essentially intact. In this study, a finite element-based analysis of the collision was performed. The first 0.5 seconds of the collision was simulated. Results of the analysis were compared with accelerometer and video test data. Specific comparisons are made between test data and model predictions for: motions of the cab car and the standing locomotive; longitudinal forces arising between the cab car and the standing locomotive and between the respective lead and trailing vehicles; and the mode of deformation of the cab car and the locomotive. The results of the study indicate that the model captures pertinent features of the first 0.3 seconds of the collision, particularly with respect to longitudinal vehicle motions and collision forces. After 0.3 seconds, agreement between model predictions and test data becomes progressively worse. This is attributable to the model's inability to capture the massive fracture that occurs at the front of the cab car.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127560374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hardware - software structure for on-line power quality assessment: part I","authors":"A. Moussa, M. EI-Gammal, E. N. Abdallah, A.A. EI-Seoud","doi":"10.1115/RTD2004-66022","DOIUrl":"https://doi.org/10.1115/RTD2004-66022","url":null,"abstract":"The main objective of the proposed work is to introduce a new concept of advanced power quality assessment. The introduced system is implemented using applications of a set of powerful software algorithms and a digital signal processor based hardware data acquisition system. The suggested scheme is mainly to construct a system for real time detection and identification of different types of power quality disturbances that produce a sudden change in the power quality levels. Moreover, a new mitigation technique through generating feedback correction signals for disturbance compensation is addressed. The performance of the suggested system is tested and verified through real test examples. The obtained results reveal that, the introduced system detects fast and accurately most of the power quality disturbance events and introduces new indicative factors estimating the performance of any supply system subjected to a set number of disturbance events.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127572385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fullscale two-car impact test: a comparison of measured and model results","authors":"R. Rancatore, Ronald Mayville, MA Associates Newton, Mark Baldwin, Eloy Martinez","doi":"10.1115/RTD2004-66032","DOIUrl":"https://doi.org/10.1115/RTD2004-66032","url":null,"abstract":"The Volpe National Transportation Systems Center is conducting research into the crashworthiness of rail vehicles in support of the Federal Railroad Administration's Office of Research and Development. The approach taken has focused on the review of accidents, development of analytical tools and performing full-scale testing. A series of inline full-scale impact tests have been performed using conventional passenger cars. Recent full-scale testing included two instrumented coupled conventional passenger cars impacting a fixed barrier at 26 mph. The cars were instrumented with accelerometers, strain gages and string potentiometers. From these measurements, car translations, rotations, relative displacements and coupler forces were calculated. A rigid body dynamics model of the two-car configuration was developed and used to design the test. In order to improve the collision dynamics models of passenger cars, the results from this test are being used to refine that model. This paper describes the two-car impact test, the reduction of data collected during the test and the refined collision dynamics model. Post-test refinements allow the model to more accurately simulate the vertical and lateral motions of the cars, including the timing of the lateral buckling of the cars. The post-test model also more accurately simulates the climbing of the impact car as it crushes. Comparisons between the refined model results with the measured data are presented for the motion of the center of gravity of the cars, coupled car interactions and forces, and lateral buckling.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128766706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi level boarding bi-level commuter car for North American market","authors":"R. Sarunac, T.B. Soesbee, Shin'ichi Ohta","doi":"10.1115/RTD2004-66019","DOIUrl":"https://doi.org/10.1115/RTD2004-66019","url":null,"abstract":"A multilevel boarding version (low and high level platform boarding) of the bi-level commuter car for the North American market has been developed. The major challenge of the bi-level carbody design with the high and lower boarding access, i.e., passenger doors, is the side sill interruption at the lower level. The side sill is the main structural member (beside the center sill) that transmits the longitudinal load from the one end of the car to the other end. Since the side sill is interrupted by placing lower level passenger doors the alternative load path had to be designed. Originally, a solution similar to the one used on the California bi-level car was considered. However, due to major differences in the equipment arrangement and seating plan, an alternative design was developed. Consequently, the LIRR carbody type was chosen, with the exception that the lower body section between bolsters, \"fish belly\" was similar to the MARC III section. The specific goal and the first step were to study and confirm the feasibility of the concept. As a good engineering practice, prior to the initiation of any major carbody design, a preliminary structural analysis was provided. The worst-case structural scenarios regarding door and window locations were considered. Preliminary structural analysis included linear, static, finite element carbody analysis for various loads and loads requirements defined. This study summarizes the results of the analyses for each load case. The study also comprises the investigation and applicability of the relevant laws and requirements for Tier-l passenger equipment with specific emphasis to the bi-level car. The applicability of the code of federal regulations, 49 CFR, transportation, parts 200 to 399 and American Public Transit Association (APTA) manual of standards and recommended practices for rail passenger equipment was investigated in detail. Relevant laws, standards, and requirements for Tier-I passenger equipment were identified, categorized and prioritized. Based on the relevant standards, feasibility analysis was performed for the most demanding design. Stress contour and deflection plots from the finite element analyses are provided only for the worst-case direction for a given loading scenario. Floor and seating plans accommodating the multilevel boarding options were developed.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130619066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Hi-Lo Bi-Track System","authors":"B. T. Scales","doi":"10.1115/RTD2004-66008","DOIUrl":"https://doi.org/10.1115/RTD2004-66008","url":null,"abstract":"The Hi-Lo Bi-Track System is an innovative technology that provides appropriate superelevations on curves to suit both high-speed passenger trains and low-speed freight trains. Adoption of the Hi-Lo Bi-Track System would provide the following benefits: (a) permit creation of high-speed lines for passenger trains over existing freight train rights-of-way without compromising performance of either train technology; (b) provide improvement in typical train trip times due to reduced need for speed reduction at curves; (c) provide savings in energy consumption due to less braking for curves and subsequent acceleration back to line speed; (d) provide better performance then \"tilting trains\" in reducing typical train trip times; (e) avoid high vertical and lateral track forces resulting from operation of \"tilting trains\"; and (f) applicable to high-speed mail and express freight trains in addition to high-speed passenger trains.","PeriodicalId":217214,"journal":{"name":"ASME/IEEE Joint Rail Conference, 2004. Proceedings of the 2004","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130677511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}