基于多学科优化的高速列车车体结构耐久性评估技术

来源 :2014年全国固体力学学术大会 | 被引量 : 0次 | 上传用户:LAMYAN
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  高速列车车体结构耐久性设计和分析是现代轨道车辆安全可靠性研究的重要内容之一。本文结合实际工程中高速列车车体结构在复杂载荷环境下所面临的载荷历程、材料特性和结构几何特征三要素,完整提出基于多学科优化的车体结构耐久性评估新方法。内容包括:(1)利用多体系统(MBS)进行复杂车辆系统进行刚柔耦合建模与仿真;(2)采用结构有限元法对结构进行准静态应力分析、模态分析和特征值提取;(3)基于多体系统的多学科优化方法对车体结构进行疲劳寿命预测。该方法优点在于能基于虚拟样机技术,通过并行工程和多学科优化分析技术,更好地研究车体结构耐久性设计方法,更加深入地理解整车动态特性和结构疲劳损伤之间的作用机理,为高速列车车体结构耐久性评估提供理论依据和优化方法。
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