刀口式法兰平面密封结构的稳健设计
发布时间：2018-12-13 14:23
【摘要】：密封是现代工程技术中的一个重要领域,密封结构的有效性很大程度上决定了整个系统的安全性与可靠性,寻求经济、有效的密封装置已成为密封领域设计师的主要课题。刀口式法兰平面密封结构(简称刀口密封结构)具有构造简单、高密封度等特点,常用于对介质密封性要求较高的金属类包装容器中。本文以某危险品包装容器刀口密封结构为研究对象,利用有限元模拟进行数值试验,结合稳健优化设计方法,对该密封结构进行了稳健设计,得到了较为合理的设计参数组合。 首先,通过对金属平垫密封条件的分析,建立了数值模拟中所使用的有效密封判据,有效密封面宽与最大接触压力构成评价不同密封结构密封性能优劣的重要标准。 其次,开展单因素作用下密封结构的数值模拟分析,获得了刀口密封结构主要设计参数与密封性能评价指标的关系曲线,确定了主要设计参数的取值范围。在此基础上,设计均匀数值试验,建立以有效密封面宽和最大接触压力为响应的关于各主要设计参数的二阶响应面模型,并利用遗传算法对模型进行单目标、多目标寻优,得到优化的设计参数组合。 最后,考虑由外界条件干扰而引起的设计参数不确定性扰动,在优化模型中添加表征目标函数稳健性的灵敏度附加项,并对约束条件进行稳健可行性调整,将优化模型转换为稳健优化模型。通过求解,得到了较稳健的设计参数组合,为某危险品包装容器密封结构设计参数的确定提供了参考。
[Abstract]:Sealing is an important field in modern engineering technology. The effectiveness of sealing structure largely determines the safety and reliability of the whole system. Seeking economic and effective sealing devices has become the main topic for designers in the field of sealing. Cutting edge flange plane seal structure (abbreviated as knife edge seal structure) has the characteristics of simple construction and high sealing degree. It is often used in metal packaging containers with high requirements for medium sealing. This paper takes the knife edge seal structure of a dangerous goods packaging container as the research object, carries on the numerical test by the finite element simulation, unifies the robust optimization design method, has carried on the robust design to the seal structure, has obtained the reasonable design parameter combination. Firstly, through the analysis of the sealing conditions of metal flat gasket, the effective sealing criterion used in numerical simulation is established. The effective sealing face width and the maximum contact pressure constitute the important criteria for evaluating the sealing performance of different seal structures. Secondly, the numerical simulation analysis of seal structure under single factor is carried out, and the relationship curve between the main design parameters and seal performance evaluation index is obtained, and the range of the main design parameters is determined. On this basis, a uniform numerical experiment is designed to establish a second-order response surface model for the main design parameters in response to the effective sealing cover width and the maximum contact pressure, and the genetic algorithm is used to optimize the model with single objective and multi-objective. The optimal combination of design parameters is obtained. Finally, considering the uncertainty disturbance of the design parameters caused by the disturbance of external conditions, adding the sensitivity additional items to the optimization model to characterize the robustness of the objective function, and adjusting the robustness feasibility of the constraint conditions. The optimization model is transformed into a robust optimization model. By solving the problem, a more robust combination of design parameters is obtained, which provides a reference for the determination of the design parameters of the sealing structure of a dangerous goods packaging container.
【学位授予单位】：中国工程物理研究院
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH136
本文编号：2376682
[Abstract]:Sealing is an important field in modern engineering technology. The effectiveness of sealing structure largely determines the safety and reliability of the whole system. Seeking economic and effective sealing devices has become the main topic for designers in the field of sealing. Cutting edge flange plane seal structure (abbreviated as knife edge seal structure) has the characteristics of simple construction and high sealing degree. It is often used in metal packaging containers with high requirements for medium sealing. This paper takes the knife edge seal structure of a dangerous goods packaging container as the research object, carries on the numerical test by the finite element simulation, unifies the robust optimization design method, has carried on the robust design to the seal structure, has obtained the reasonable design parameter combination. Firstly, through the analysis of the sealing conditions of metal flat gasket, the effective sealing criterion used in numerical simulation is established. The effective sealing face width and the maximum contact pressure constitute the important criteria for evaluating the sealing performance of different seal structures. Secondly, the numerical simulation analysis of seal structure under single factor is carried out, and the relationship curve between the main design parameters and seal performance evaluation index is obtained, and the range of the main design parameters is determined. On this basis, a uniform numerical experiment is designed to establish a second-order response surface model for the main design parameters in response to the effective sealing cover width and the maximum contact pressure, and the genetic algorithm is used to optimize the model with single objective and multi-objective. The optimal combination of design parameters is obtained. Finally, considering the uncertainty disturbance of the design parameters caused by the disturbance of external conditions, adding the sensitivity additional items to the optimization model to characterize the robustness of the objective function, and adjusting the robustness feasibility of the constraint conditions. The optimization model is transformed into a robust optimization model. By solving the problem, a more robust combination of design parameters is obtained, which provides a reference for the determination of the design parameters of the sealing structure of a dangerous goods packaging container.
【学位授予单位】：中国工程物理研究院
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH136
【引证文献】
相关博士学位论文 前1条
1 许焕卫;稳健设计建模及优化方法研究[D];大连理工大学;2009年
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