| Project/Area Number |
17K06529
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
|
|---|
| Research Institution | Niigata University |
|---|
Principal Investigator |
Abe Kazuhisa 新潟大学, 自然科学系, 教授 (40175899)
|
|---|
| Project Period (FY) |
2017-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2019)
|
| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
|
|---|
| Keywords | レール軸力推定 / 慣性正矢法 / 軌道検測 / 通り変位 / 構造工学・地震工学 / 交通工学・国土計画 / 鉄道工学 |
|---|
| Outline of Final Research Achievements |
In order to estimate the mechanical conditions of a track such as the rail axial load and the ballast lateral stiffness, a track monitoring method utilizing the lateral rail displacement measured by an instrument mounted on a commercial train is studied. For this purpose, a mechanical relationship between the lateral rail deflection and the axial stress is derived. A 4th order polynomial in which the coefficients of the 2nd and 4th order terms are described in terms of the mechanical unknowns is then obtained. Through numerical experiments, the theoretical validity of the method has been proved. Moreover, it has also been found that, at least, the relative rail stress can be estimated to an elaborated track model which takes into account its mechanical nonlinearity.
|
| Academic Significance and Societal Importance of the Research Achievements |
営業列車に搭載した検測装置による軌道状態監視の検討は，国内外において精力的に行われている．しかし，これらは軌道の幾何形状に基づいた異常箇所の検出や，軌道変位進みの将来予測に主眼が置かれており，力学状態の把握は検討の対象外とされてきた．一方，レール軸力測定法の研究は，定期点検を前提とした定点測定のみが対象であった．本研究では，レール軸力とそれに起因する軌道形状の変化との力学的関係に着目し，これらを理論的に関連付け，軸力と道床横抵抗力といった軌道の力学状態の線区全域に亘る高頻度モニタリングを対象とする点に学術的，社会的意義がある．
|
