基于网络的多轴应变疲劳分析平台的研发

发布时间：2018-03-14 04:18

本文选题：网络　切入点：多轴疲劳　出处：《大连理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：现阶段服役中的航空航天飞行器、核电站、压力容器以及汽车中的一些主要零部件通常是承受复杂的多轴疲劳作用。多轴疲劳更加真实的反映了零部件的失效形式,然而对零部件进行多轴疲劳寿命预测却是非常复杂的,其中涉及到查询众多疲劳参数,并进行复杂的分析计算等。因此传统的人工计算非常繁琐耗时。随着国家大力提倡“互联网+”战略,通过将网络技术与多轴疲劳寿命分析理论结合,来研发多轴应变疲劳分析平台,这种基于网络的分析平台不仅可以提高研发人员的工作效率、计算结果精确,而且可以实现无纸化办公、资源共享。首先,本文对多轴疲劳寿命预测理论进行了回顾。对多轴常幅和变幅载荷下的寿命预测步骤进行了总结。本分析平台采用Wang-Brown方法进行多轴循环计数,使用Wang-Brown模型进行损伤计算,利用Miner准则进行多轴疲劳损伤累积,来预测多轴疲劳寿命。其次,分析平台基于Spring MVC设计模式,在开发环境Eclipse下,使用JSP技术设计平台界面,利用面向对象编程语言Java编写分析程序,选用PostgreSQL数据库创建材料数据表,采用Tomcat服务器技术运行和测试分析平台,最终研发出基于网络的多轴应变疲劳分析平台。最后,通过工程实例验证,结果表明分析平台对于常幅与变幅加载下的多轴疲劳寿命有较好的预测结果。此分析平台的研究开发,降低了工程研发人员的劳动强度,有利于促进网络技术在多轴疲劳寿命预测中的应用。
[Abstract]:Aircraft, aerospace service in current nuclear power plants, some of the main parts of pressure vessel and vehicle is usually under multiaxial fatigue. Complex multiaxial fatigue reflect the failure forms of parts, but the parts were multiaxial fatigue life prediction is very complicated, which involves many queries the fatigue parameters, and complex calculation. Therefore the traditional calculation is very complicated and time-consuming. With the national advocate "Internet plus" strategy, through the analysis of the network technology and the multi axial fatigue life theory combined to research analysis platform of multiaxial fatigue, this analysis platform based on network can not only improve the R & D personnel the work efficiency, accurate results, but also can realize the paperless office, the sharing of resources. Firstly, the theory of back prediction of multiaxial fatigue life Gu. Summarizes the multiaxial constant amplitude and variable amplitude load life prediction steps. Multi axis cycle counting the analysis platform by using Wang-Brown method, using the Wang-Brown model for damage calculation, using Miner criterion of fatigue damage, to predict multiaxial fatigue life. Secondly, analysis platform Spring MVC design pattern based on the Eclipse development environment, using JSP technology to design the platform interface, the use of object-oriented programming language Java analysis program, using PostgreSQL database to create material data sheet, using Tomcat server technology operation and test analysis platform, eventually developed. Multi axial strain fatigue analysis platform based on network finally, through the engineering example, the results show that the analysis platform has better prediction results for multiaxial fatigue life under constant amplitude and variable amplitude loading. The analysis of the research and development platform, reduce the The labor intensity of the engineering R & D personnel is beneficial to the application of the network technology in the multiaxial fatigue life prediction.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP311.52;TH114

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