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| Identification of power spectral density of vertical track irregularity based on inverse pseudo excitation method |
| Received:April 17, 2012 Revised:August 18, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201302003 |
| KeyWord:random vibration load identification inverse pseudo excitation method track irregularity |
| Author | Institution |
| 张健 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
| 赵岩 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
| 张亚辉 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
| 钟万勰 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
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| Abstract: |
| A new method is proposed to identify the power spectral density (PSD) of the vertical track irregularity.The vertically coupled vehicle-slab track model is established which belongs to moving irregularity model.The vehicle model is simplified as a multi-rigid body model,and the slab track model is considered as a three-layer beam model.The vehicle model and the slab track model are coupled by the linearized wheel-rail contact.The axle box acceleration is used as a measurement target.The PSD of the vertical track irregularity is obtained using the inverse pseudo excitation method.It revealed that the identification accuracy is affected by the measurement accuracy of the axle-box acceleration and vehicle speed.Numerical results indicate that the proposed method can be accurately identified the PSD of the vertical track irregularity,and presents a new way for identification and assessment of the train load. |