基于线性数值模拟及Neuber理论修正的弹塑性结构强度分析

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英文篇名：Strength Estimation based on Linear Numerical Analysis and Neuber-Formula 作者：张晓艳 ; 胡忠安 ; 薛宁鑫 ; 张玉涛 英文作者：ZHANG Xiaoyan;HU Zhongan;XUE Ningxin;ZHANG Yutao;National Engineering Technology and Research Center for System Integration of Railway Vehicle, CRRC Changchun Railway Vehicles Co., Ltd; 关键词：数值模拟 ; 弹塑性 ; Neuber理论 英文关键词：numerical;;elastic-plastic;;Neuber theory 中文刊名：DLTD 英文刊名：Journal of Dalian Jiaotong University 机构：中车长春轨道客车股份有限公司国家轨道客车系统集成工程技术研究中心; 出版日期：2019-04-09 出版单位：大连交通大学学报 年：2019 期：v.40;No.182 基金：国家重点研发计划资助项目(2016YFB1200505-002) 语种：中文; 页：DLTD201902011 页数：4 CN：02 ISSN：21-1550/U 分类号：47-50

摘要

以某城际车转向架构架为例,介绍了基于线性数值模拟及Neuber理论修正的弹塑性结构强度评估过程.为了验证上述修正方法的可靠性和精度,进行了基于Neuber理论及线性理论两种修正方法评估构架强度,同时计算了构架的弹塑性分析,结果验证了对于结构的缺口局部区域超出屈服的情况,基于线性数值模拟及Neuber理论修正的弹塑性结构强度分析具有较高的精度,该方法可以应用到实际的工程结构强度评估中.
        Traditional nonlinear FEA analysis simulating the stress and strain in the plastic region is time and resource consuming. To reduce the resource consumed in nonlinear FEA analysis, an approach based on linear FEA analysis and the Neuber formula was adopted. A new permissible stress is calculated to estimate the strength from the linear analysis results. A railway wheel is taken as an example, and the process of strength estimation based on linear numerical analysis and the Neuber-Formula is described. To validate the reliability and the accuracy of this approach, linear-modified theory calculation and plastic-elastic analysis of the wheel are performed. Finally, it is proved that the strength estimation based on linear numerical analysis and the Neuber-Formula is highly accurate and can be applied to engineering structure strength estimation.

引文

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