Monte Carlo study of holding forces for tank cars on grades

Alexy, J. Karl; Jeong, David Y.; Gonzalez, Francisco, III; United States. Department of Transportation. Federal Railroad Administration. Office of Research and Development; United States. Department of Transportation. Federal Railroad Administration; John A. Volpe National Transportation Systems Center (U.S.)

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Monte Carlo study of holding forces for tank cars on grades

2013-04-15
By Alexy, J. Karl ; Jeong, David Y. ; Gonzalez, Francisco, III

[PDF-541.81 KB]

English

Details You May Also Like

Details:

Alternative Title:

Joint Rail Conference
Creators:

Alexy, J. Karl ; Jeong, David Y. ; Gonzalez, Francisco, III

Alexy, J. Karl ; Jeong, David Y. ; Gonzalez, Francisco, III Less -
Corporate Creators:

United States. Department of Transportation. Federal Railroad Administration. Office of Research and Development ; United States. Department of Transportation. Federal Railroad Administration ; John A. Volpe National Transportation Systems Center (U.S.)

United States. Department of Transportation. Federal Railroad Administration. Office of Research and Development ; United States. Department of Transportation. Federal Railroad Administration ; John A. Volpe National Transportation Systems Center (U.S.) Less -
Subject/TRT Terms:

[+]

Blocking Braking Braking Systems Chocking Emergency Brakes Force Holding Forces Loading And Unloading Monte Carlo Method Railroad Cars Railroad Tank Cars Simulation Tank Cars
Publication/ Report Number:

JRC2013-2563
Resource Type:

Proceedings
Geographical Coverage:

United States
Corporate Publisher:

American Society of Mechanical Engineers ; Institute of Electrical and Electronics Engineers

American Society of Mechanical Engineers ; Institute of Electrical and Electronics Engineers Less -
Abstract:

This paper describes a numerical procedure to examine the holding forces needed to secure a cut of railroad tank cars staged on a grade during loading and unloading operations. Holding forces are created by applying emergency brake systems and blocking (or clocking) wheels. Moreover, the holding force to secure the cut of cars must be greater than or equal to the gravitational component of force acting on the cars that is parallel to the grade. Engineering statics are applied to examine the forces acting on the individual cars resting on an inclined plane. An equation to calculate holding force is developed that includes two types of factors; constants (i.e. nonrandom or deterministic factors) and probabilistic variables (i.e. factors with inherent uncertainty or randomness). The numerical procedure applies Monte Carlo simulation techniques to study the uncertainties in the engineering analysis. The Monte Carlo approach is well suited to study the uncertainties and inherent variability associated with some of these factors. The factors assumed to be deterministic in this procedure are: steepness of the grade, total number of cars on the grade, number of cars with hand brakes applied, number of chocked wheels, and weight of the tank cars. The factors treated as random variables are: tension in the hand brake chain, mechanical efficiency in the linkages of the brake system, coefficient of friction between the brake pad and the wheel, and the coefficient of friction between the chocks and the rail. Probability distributions are assumed for each of the random variables. In addition, a probabilistic sensitivity analysis is conducted to examine the relative effect of the random variables on the reliability of the braking system to secure the cut of tank cars on a grade.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:5f1577f0dcf06b947881fca92c3e848f4dd3619f5dbfa1db7b71755a2e85aeb2
Download URL:

https://rosap.ntl.bts.gov/view/dot/10007/dot_10007_DS1.pdf
File Type:

No Additional Files

More +

Monte Carlo study of holding forces for tank cars on grades

Details:

Supporting Files

You May Also Like