Progress in Railroad Freight Car Engineering

2002 ◽  
Author(s):  
Swamidas K. Punwani
Keyword(s):  
Web Sites ◽  
Rail Transportation ◽  
Recent Past ◽  
New Developments ◽  
Freight Car ◽  
American Society ◽  
Design Construction ◽  
Railroad Freight

Every year the Rail Transportation Division (RTD), American Society of Mechanical Engineers (ASME) conducts a survey to document progress in the design, construction and use of freight cars and components. This paper describes the new developments. Some information was obtained from web sites. The industry continued to focus on the evolution of freight equipment in 2002 by adding flexibility and versatility to designs developed in the recent past. Due to a slow down in new car building fewer responses were received.

Progress in Railroad Freight Car Engineering

2000 ◽  
Author(s):  
Swamidas K. Punwani
Keyword(s):  
Web Sites ◽  
Rail Transportation ◽  
Recent Past ◽  
New Developments ◽  
Freight Car ◽  
American Society ◽  
Design Construction ◽  
Railroad Freight

Abstract Every year the Rail Transportation Division (RTD), American Society of Mechanical Engineers (ASME) conducts a survey to document progress in the design, construction and use of freight cars and components. This paper describes the new developments. Some information was obtained from web sites. The industry continued to focus on the evolution of freight equipment in 2000 by adding flexibility and versatility to designs developed in the recent past.

Progress in Railroad Freight Car Engineering

2001 ◽  
Author(s):  
Swamidas K. Punwani
Keyword(s):  
Rail Transportation ◽  
Recent Past ◽  
New Developments ◽  
Freight Car ◽  
American Society ◽  
Design Construction ◽  
Railroad Freight

Abstract Every year the Rail Transportation Division (RTD), American Society of Mechanical Engineers (ASME) conducts a survey to document progress in the design, construction and use of freight cars and components. The response in 2001 was not overwhelming. New developments were scarce. The industry continued to focus on the evolution of freight equipment in 2001 by adding flexibility and versatility to designs developed in the recent past.

American Railroad Freight Cars: 100 Years of Progress, 1920-2020

2020 ◽  
Author(s):  
Shaun Richmond
Keyword(s):  
White Men ◽  
Important Change ◽  
100Th Anniversary ◽  
Fe Analysis ◽  
Rail Transportation ◽  
Basic Design ◽  
Freight Car ◽  
Electronic Instrumentation ◽  
Railroad Freight ◽  
Design And Construction

Abstract This paper was written to commemorate the 100th anniversary of the ASME Rail Transportation Division, which was founded in 1920 and held its first meeting in St. Louis. It attempts to paint a picture of the U. S. railroad freight car and the engineering processes involved in its design and construction in 1920 and compare this with today’s designs and practices. Progress in freight car design has been evolutionary rather than revolutionary. The steel freight car had largely replaced its wooden predecessor by 1920 and the basic design of many cars was already in place. Exceptions being the Spine Car and the Well Car, which were entirely unknown in 1920. The Box Car has diminished greatly in importance and more specialized cars are now common. One important difference is that welding is now used extensively in freight car construction whereas in 1920 riveting was almost universal. An important change is the availability of electronic instrumentation to measure, record and analyze the load environment of cars. This has allowed the development of performance-based specifications and these have largely replaced the prescriptive standards used in 1920. CAD and FE analysis have revolutionized the way in which cars are designed, allowing much more refined analysis which has led to far lighter car designs. In 1920 virtually all Engineers were white men — this too is changing.

Dynamic Rocking Response and Optimization of the Nonlinear Suspension of a Railroad Freight Car

1980 ◽  
Vol 102 (1) ◽  
pp. 86-93 ◽  
Author(s):  
M. Samaha ◽  
T. S. Sankar
Keyword(s):  
Equations Of Motion ◽  
Sine Wave ◽  
Optimization Techniques ◽  
Model Accuracy ◽  
Frequency Responses ◽  
Optimum Parameters ◽  
Freight Car ◽  
Six Degree Of Freedom ◽  
Railroad Freight ◽  
Rocking Response

A modified mathematical model of a large capacity railroad freight vehicle is presented. The model for this investigation is constructed in such a way to describe the bounce, sway and rocking modes of the system and also to account for most of the vehicle non-linearity effects. Equations of motion of the six degree of freedom nonlinear model are derived assuming that the excitations from the track in vertical and lateral directions are purely periodic in the form of a rectified sine wave. The solution for the time and frequency responses on digital computer are compared with available measured data to investigate the model accuracy. Multivariable optimization techniques are employed to find the optimum suspension parameters that minimizes the maximum car rocking response over the frequency range of interest. The optimum parameters are presented in different forms either for the existing or for stabilized vehicle configuration.

Design and Construction of the Concrete Canoe California II

1986 ◽  
Vol 23 (03) ◽  
pp. 271-275
Author(s):  
R. Cengiz Ertekin ◽  
Bradford A. Porter
Keyword(s):  
University Of California ◽  
And Performance ◽  
American Society ◽  
The University ◽  
Design Construction ◽  
Design And Construction ◽  
Civil Engineers

Student chapters of the American Society of Civil Engineers participate annually in a competition for the design, construction and performance of concrete canoes that meet certain minimum rule restrictions. This paper reports on the craft entered in the 1984 competition by students at the University of California/ Berkeley. The Berkeley team came in second in the men's and women's races and placed first in both design and construction.

A Life-Cycle Risk-Informed Systems Structured Nuclear Code

2002 ◽  
Author(s):  
Ralph S. Hill
Keyword(s):  
Life Cycle ◽  
American Concrete Institute ◽  
Design Code ◽  
Replacement Decisions ◽  
Plant Operations ◽  
Operations And Maintenance ◽  
Asme Code ◽  
American Society ◽  
Construction Operation ◽  
Design Construction

Current American Society of Mechanical Engineers (ASME) nuclear codes and standards rely primarily on deterministic and mechanistic approaches to design. The design code is a separate volume from the code for inservice inspections and both are separate from the standards for operations and maintenance. The ASME code for inservice inspections and code for nuclear plant operations and maintenance have adopted risk-informed methodologies for inservice inspection, preventive maintenance, and repair and replacement decisions. The American Institute of Steel Construction and the American Concrete Institute have incorporated risk-informed probabilistic methodologies into their design codes. It is proposed that the ASME nuclear code should undergo a planned evolution that integrates the various nuclear codes and standards and adopts a risk-informed approach across a facility life-cycle — encompassing design, construction, operation, maintenance and closure.

Comprehension of Online Educational Material Regarding Orofacial Clefts

2019 ◽  
Vol 56 (9) ◽  
pp. 1206-1212
Author(s):  
Diana S. Jodeh ◽  
Aleshia J. Pringle ◽  
S. Alex Rottgers
Keyword(s):  
Web Sites ◽  
Web Site ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
The United States ◽  
Educational Material ◽  
Reading Level ◽  
Significant Difference ◽  
The Mean ◽  
American Society

Background:Cleft lip and palate are among the common birth defects in the United States. Management is complex and may be difficult for parents and patients to understand. The goal of this study was to evaluate the readability of online educational material provided by the American Society of Plastic Surgeons (ASPS) and the American Cleft Palate-Craniofacial Association (ACPA) websites regarding cleft lip and palate and to assess parents’ comprehension.Methods:Parents of children younger than 10 years of age presenting to the plastic and reconstructive surgery clinic at Johns Hopkins All Children’s Hospital for conditions other than cleft lip and palate were recruited for participation. Parents were given the literature published on the ASPS and ACPA web sites to review and were asked to complete a 5-question test specifically targeted to the content of the passage they reviewed. We tested the readability of the 2 online passages using Readability Studio software (Oleander Software Solutions Ltd).Results:Sixty parents completed the study. Across all groups, the mean score was 4.35 of a possible 5. The mean score was 4.4 for the ASPS web site and 4.29 for the ACPA web site. Fifty-three percent of participants answered all questions correctly. No significant difference in scores was noted between web sites ( P = .48).Conclusions:Despite containing content of varying reading-level difficulty, the literature posted on the ACPA and ASPS web sites concerning cleft lip and palate conveyed information equally well to the target parent demographic with high levels of comprehension.

A Simulation Research for Railroad Freight Car-to-Car End Impact Based on Numerical Analysis

2015 ◽  
Vol 764-765 ◽  
pp. 1020-1025 ◽  
Author(s):  
Meng Qi Ma ◽  
Fang Ping Lei ◽  
Yu Qiao Ren ◽  
Bai Song Mu
Keyword(s):  
Numerical Analysis ◽  
Kinematic Model ◽  
Kutta Method ◽  
Simulation Research ◽  
Runge Kutta Method ◽  
Freight Car ◽  
Runge Kutta ◽  
Relationship Of ◽  
The Relationship ◽  
Railroad Freight

A method of establishing a kinematic model for simulated railroad freight car impact based on the Runge-Kutta method is introduced in this paper. The model is solved based on numerical analysis to obtain the relationship of variables, furthermore providing a basis for determining the loading support and loading securement method.

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