| 基于逆虚拟激励法的垂向轨道不平顺功率谱识别 |
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| 引用本文： | 张健,赵岩,张亚辉,钟万勰. 基于逆虚拟激励法的垂向轨道不平顺功率谱识别[J]. 计算力学学报, 2013, 30(2): 187-191 |
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| 作者姓名： | 张健 赵岩 张亚辉 钟万勰 |
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| 作者单位： | 大连理工大学工业装备结构分析国家重点实验室,大连,116024 |
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| 基金项目： | "九七三"国家重点基础研究计划"复杂装备研发数字化工具中的计算力学和多场耦合若干前沿问题"课题(2010CB832704);"十一五"国家科技支撑计划"中国高速列车关键技术研究及装备研制"项目(2009BAG12A04);自然科学基金(11172056)资助项目. |
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| 摘 要： | 提出一种识别轨道垂向不平顺功率谱的新方法.采用定点激励的垂向车辆-板式轨道耦合动力学模型.车辆简化为多刚体模型,板式轨道考虑为3层梁模型,并通过线性轮轨力耦合车辆模型和轨道模型.以轴箱加速度作为测量对象,采用逆虚拟激励法识别垂向轨道不平顺的功率谱,并研究了测量误差和车辆运行速度对垂向轨道不平顺的识别精度的影响.数值结果表明,本文方法能够较为准确地识别垂向轨道不平顺功率谱,为列车运行环境载荷识别与评估提供了新的途径.
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| 关 键 词： | 随机振动 载荷识别 逆虚拟激励法 轨道不平顺 |
| 收稿时间： | 2012-04-17 |
| 修稿时间： | 2012-08-18 |
Identification of power spectral density of vertical track irregularity based on inverse pseudo excitation method |
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| ZHANG Jian,ZHAO Yan,ZHANG Ya-hui and ZHONG Wan-xie. Identification of power spectral density of vertical track irregularity based on inverse pseudo excitation method[J]. Chinese Journal of Computational Mechanics, 2013, 30(2): 187-191 |
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| Authors: | ZHANG Jian ZHAO Yan ZHANG Ya-hui ZHONG Wan-xie |
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| Affiliation: | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China |
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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. |
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| Keywords: | random vibration load identification inverse pseudo excitation method track irregularity |
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