Error Estimation in Wheel-Rail Normal Contact Area Measurements Using Pressure Sensitive Film PDF Download
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Author: Jagoba Lekue
Publisher: Apprimus Wissenschaftsverlag
ISBN: 3985550921
Category : Technology & Engineering
Languages : en
Pages : 142
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Book Description
This monograph presents a series of research activities with the goal of determining whether pressure measurement films are a suitable tool for a quantitative assessment of the wheel-rail contact area. Firstly, the effect of influential factors such as geometry, applied load and surface roughness on the resulting imprint was thoroughly examined by means of analytically approachable case studies. This allowed a precise determination of the systematic error that alters experimental outcomes. After that, finite element representations of the measurement procedure were explored in order to characterize the measurement deviation based on mechanical principles. By virtue of the excellent reproducibility of the measurement procedure, as well as the meaningful insight obtained from finite element simulations, an empirically calibrated film model that matches experimental outcomes was developed. This was alternately interposed between wheel and rail models to estimate the measurement error originated under typical operation conditions. The results underline the marked dependence of the measurement error on surface roughness but foresee a robust and reliable use of pressure measurement films for validation of wheel-rail contact models as long as both numerical and experimental solutions represent the same reality of interest.
Author: Jagoba Lekue
Publisher: Apprimus Wissenschaftsverlag
ISBN: 3985550921
Category : Technology & Engineering
Languages : en
Pages : 142
Get Book
Book Description
This monograph presents a series of research activities with the goal of determining whether pressure measurement films are a suitable tool for a quantitative assessment of the wheel-rail contact area. Firstly, the effect of influential factors such as geometry, applied load and surface roughness on the resulting imprint was thoroughly examined by means of analytically approachable case studies. This allowed a precise determination of the systematic error that alters experimental outcomes. After that, finite element representations of the measurement procedure were explored in order to characterize the measurement deviation based on mechanical principles. By virtue of the excellent reproducibility of the measurement procedure, as well as the meaningful insight obtained from finite element simulations, an empirically calibrated film model that matches experimental outcomes was developed. This was alternately interposed between wheel and rail models to estimate the measurement error originated under typical operation conditions. The results underline the marked dependence of the measurement error on surface roughness but foresee a robust and reliable use of pressure measurement films for validation of wheel-rail contact models as long as both numerical and experimental solutions represent the same reality of interest.
Author: West Point Association of Graduates (Organization).
Publisher:
ISBN:
Category :
Languages : en
Pages : 578
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Author:
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ISBN:
Category : Motor vehicles
Languages : en
Pages : 404
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Author:
Publisher:
ISBN:
Category : Machine design
Languages : en
Pages : 924
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Author: United States. Patent and Trademark Office
Publisher:
ISBN:
Category : Patents
Languages : en
Pages : 1480
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Author: Samson YU
Publisher: DEStech Publications, Inc
ISBN: 1605951528
Category : Technology & Engineering
Languages : en
Pages : 898
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Book Description
International Conference on Electrical, Control and Automation （ICECA 2014）will be held from February 22nd to 23rd, 2014 in Shanghai, China. CECA 2014 will bring together top researchers from Asian Pacific areas, North America, Europe and around the world to exchange research results and address open issues in all aspects of Electrical, Control and Automation. The ICECA 2014 welcomes the submission of original full research papers, short papers, posters, workshop proposals, tutorials, and industrial professional reports.
Author: Arthur Shapiro
Publisher: Routledge
ISBN: 1135575835
Category : Education
Languages : en
Pages : 481
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Book Description
The evil prosthesis of Captain Hook, the comical speech of Porky Pig, and the bumbling antics of Mr. Magoo are all examples of images in our culture which can become the basis of negative attitudes and subliminal prejudice towards persons with disabilities. These attitudes influence and underlie discriminatory acts, resulting in negative treatment and segregation. A teacher's ability to recognize and counter such images may well determine the success of inclusion and mainstreaming programs in our schools and society. Well-researched and well-written, this book offers practical guidance as grounded in solid research to schools that are wrestling with how to mainstream children with disabilities.
Author:
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Category : Mechanical engineering
Languages : en
Pages : 432
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Author: Bhisham C Gupta
Publisher: John Wiley & Sons
ISBN: 1118522206
Category : Mathematics
Languages : en
Pages : 898
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Book Description
Introducing the tools of statistics and probability from the ground up An understanding of statistical tools is essential for engineers and scientists who often need to deal with data analysis over the course of their work. Statistics and Probability with Applications for Engineers and Scientists walks readers through a wide range of popular statistical techniques, explaining step-by-step how to generate, analyze, and interpret data for diverse applications in engineering and the natural sciences. Unique among books of this kind, Statistics and Probability with Applications for Engineers and Scientists covers descriptive statistics first, then goes on to discuss the fundamentals of probability theory. Along with case studies, examples, and real-world data sets, the book incorporates clear instructions on how to use the statistical packages Minitab® and Microsoft® Office Excel® to analyze various data sets. The book also features: • Detailed discussions on sampling distributions, statistical estimation of population parameters, hypothesis testing, reliability theory, statistical quality control including Phase I and Phase II control charts, and process capability indices • A clear presentation of nonparametric methods and simple and multiple linear regression methods, as well as a brief discussion on logistic regression method • Comprehensive guidance on the design of experiments, including randomized block designs, one- and two-way layout designs, Latin square designs, random effects and mixed effects models, factorial and fractional factorial designs, and response surface methodology • A companion website containing data sets for Minitab and Microsoft Office Excel, as well as JMP ® routines and results Assuming no background in probability and statistics, Statistics and Probability with Applications for Engineers and Scientists features a unique, yet tried-and-true, approach that is ideal for all undergraduate students as well as statistical practitioners who analyze and illustrate real-world data in engineering and the natural sciences.
Author: Massimo Losa
Publisher: CRC Press
ISBN: 1138001473
Category : Technology & Engineering
Languages : en
Pages : 806
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Book Description
Worldwide there is a growing interest in efficient planning and the design, construction and maintenance of transportation facilities and infrastructure assets. The 3rd International Conference on Transportation Infrastructure ICTI 2014 (Pisa, April 22-25, 2014) contains contributions on sustainable development and preservation of transportation infrastructure assets, with a focus on eco-efficient and cost-effective measures. Sustainability, Eco-efficiency and Conservation in Transportation Infrastructure Asset Management includes a selection of peer reviewed papers on a wide variety of topics: • Advanced modeling tools (LCA, LCC, BCA, performance prediction,design tools and systems) • Data management (monitoring and evaluation) • Emerging technologies and equipments • Innovative strategies and practices • Environmental sustainability issues • Eco-friendly design and materials • Re-use or recycling of resources • Pavements, tracks, and structures • Case studies Sustainability, Eco-efficiency and Conservation in Transportation Infrastructure Asset Management will be particularly of interest to academics, researchers, and practitioners involved in sustainable development and maintenance of transportation infrastructure assets.
