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

• Main Authors: NAKAI TAKUJI, SATO YASUHIRO, MICHITSUJI YOHEI, ONO HIROYUKI, OGATA MASATAKE, SHINAGAWA DAISUKE, ICHIYANAGI YOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 24.06.2019
• Subjects: CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MACHINES FOR MAKING RAILWAYS OF ALL KINDS; MEASURING; OTHER AUXILIARY EQUIPMENT FOR RAILWAYS; PERFORMING OPERATIONS; PERMANENT WAY; PERMANENT-WAY TOOLS; PHYSICS; RAILWAYS; TESTING; TRANSPORTING

To provide a method for accurately calculating the friction coefficient μ1between 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 μ1in a curved section. An inner track derailment coefficient κ (=lateral pressure Q1/wheel weight P1), a front tangential force index Ta (=tangential force T1/wheel weight P1), and a rear tangential force index Tb (=(tangential force T2/wheel weight P2+tangential force T2/wheel weight P2)/2) are input based on the results of performing motion analysis using friction coefficients μ1, μ1, μ2, and μ2as 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 μ1is identified. The friction coefficient μ1is 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 【課題】台車１００の前側輪軸１ａが有する外軌側車輪１１と外軌Ｒ１との間の摩擦係数μ１ｏｕｔを精度良く演算する方法を提供する。【解決手段】本発明は、曲線区間における摩擦係数μ１ｏｕｔを演算する方法であって、鉄道車両の解析モデルに対して、台車が有する４つの車輪とレールとの間の摩擦係数μ１ｏｕｔ、μ１ｉｎ、μ２ｏｕｔ、μ２ｉｎを変数とする運動解析を実行した結果に基づき、内軌脱線係数κ（＝横圧Ｑ１ｉｎ／輪重Ｐ１ｉｎ）、前側接線力指標Ｔａ（＝接線力Ｔ１ｉｎ／輪重Ｐ１ｉｎ）及び後側接線力指標Ｔｂ（＝（接線力Ｔ２ｏｕｔ／輪重Ｐ２ｏｕｔ＋接線力Ｔ２ｉｎ／輪重Ｐ２ｉｎ）／２）を入力とし、摩擦係数μ１ｏｕｔを出力とする入出力関係を同定する。鉄道車両が前記曲線区間を走行する際に測定した内軌脱線係数κ、前側接線力指標Ｔａ及び後側接線力指標Ｔｂを入出力関係の入力として用いることで、出力としての摩擦係数μ１ｏｕｔを演算する。【選択図】 図１