ROLLING STOCK FRICTION COEFFICIENT CALCULATION METHOD, SAFETY EVALUATION METHOD FOR TRAVEL, AND RAILROAD LUBRICATION STATE MANAGEMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for accurately calculating the friction coefficient μ1_out between an outer rail side wheel 11 of a front wheel set 1a of a carriage 100 and an outer rail R1.;SOLUTION: The present invention is a method for calculating a friction coefficient μ1_out in a curved section. An inner track derailment coefficient κ (=lateral pressure Q1_in/wheel weight P1_in), a front tangential force index Ta (=tangential force T1_in/wheel weight P1_in), and a rear tangential force index Tb (=(tangential force T2_out/wheel weight P2_out+tangential force T2_in/wheel weight P2_in)/2) are input based on the results of performing motion analysis using friction coefficients μ1_out, μ1_in, μ2_out, and μ2_in as variables between the four wheels of a carriage and a rail in an analysis model of a railway vehicle. Thus, the input-output relation which outputs the friction coefficient μ1_out is identified. The friction coefficient μ1_out is calculated as the output by using the inner track derailment coefficient κ, the front tangential force index Ta, and the rear tangential force index Tb, which are measured when the railway vehicle travels the curved section, as the input for the input-output relation.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT