2011 Fiscal Year Final Research Report
Several improvements of accuracy and computational cost of 3-D elastoplastic FEM for simulating railway ballast settlement
| Project/Area Number |
21760398
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Civil engineering project/Traffic engineering
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| Research Institution | Niigata University |
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Principal Investigator |
KORO Kazuhiro 新潟大学, 自然科学系, 准教授 (70361912)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 鉄道工学 / 軌道力学 / 応用力学 / 計算力学 / バラスト道床 |
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| Research Abstract |
In the present study, settlement phenomena of a railway ballasted track are simulated with 3-D FEM. Computational cost of 3-D ballast settlement analysis is reduced using a time-domain homogenization method, a multi-time scaling method or a cyclic densification model. The material parameters for the extended subloading surface elastoplasticity model are identified using the particle swarm optimization(PSO). The numerical method for simulating the variation of ballast settlement caused by the randomness of material parameters is developed with the first-order second-moment method(FOSM).
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Research Products
(10 results)
