| 4D轴货车焊接构架的疲劳强度分析方法 |
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| 引用本文： | 杨广雪,谢基龙,周素霞.4D轴货车焊接构架的疲劳强度分析方法[J].北方交通大学学报,2009(1):24-27. |
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| 作者姓名： | 杨广雪 谢基龙 周素霞 |
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| 作者单位： | 北京交通大学结构强度检测国家级认证中心,轨道车辆结构可靠性与运用检测技术教育部工程研究中心,北京100044 |
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| 基金项目： | 国家自然科学基金资助项目（50875019）;国家重点基础研究发展计划“973”项目资助（2007cB714705） |
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| 摘 要： | 以某货车厂研制的新型4D轴货车焊接整体构架为研究对象,在ANSYS9.0有限元软件中建立完整的构架三维模型,根据UIC510-3规程,分析计算构架的应力分布情况、评估其疲劳强度,得出疲劳薄弱区.采用子模型技术,对疲劳薄弱区的焊接细节结构进行热点应力分析,进一步评价构架的疲劳强度.通过动应力实测编制疲劳薄弱区的应力谱,由S-N曲线和Miner累积损伤法则,预测构架的疲劳寿命.
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| 关 键 词： | 疲劳 焊接构架 热点应力法 应力谱 |
Fatigue Strength Evaluation Method of Welded Frame of Four-Axle Wagon |
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| YANG Guangxue,XIE Jilong,ZHOU Suxia.Fatigue Strength Evaluation Method of Welded Frame of Four-Axle Wagon[J].Journal of Northern Jiaotong University,2009(1):24-27. |
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| Authors: | YANG Guangxue XIE Jilong ZHOU Suxia |
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| Affiliation: | (Laboratory for Structural Strength Testing(Beijing Jiaotong University),China National Accreditation Servicefor Conformity Assessment;Engineering Research Center of Structure Reliability and Operation MeasurementTechnology of Rail Guided Vehicles(Beijing Jiaotong University),Ministry of Education.Beijing 100044,China) |
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| Abstract: | Aiming at a welded fame of a new style four-axle wagon bogie developed by some wagon company,a three-dimensional model is established by using the finite element software of ANSYS 9.0.On the basis of the UIC510-3 Rule,the stress distribution of the whole welded frame was analyzed and calculated,and the fatigue strength of the welded frame was evaluated,and the strength weak zone was also obtained.Then,with the submodelling method,the hot spot stress of the local welded detailed structure of the strength weak zone was acquired.Therefore,the fatigue strength of the welded frame was evaluated again.Dynamic stress test was implemented.The stress spectrum of the weak zone was plotted as the wagon run on track.With the help of S-N curve and Miner cumulative damage code,the fatigue life of the frame was finally predicted. |
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| Keywords: | fatigue welded frame hot spot stress method stress spectrum |
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