【摘要】：密封是現(xiàn)代工程技術(shù)中的一個(gè)重要領(lǐng)域,密封結(jié)構(gòu)的有效性很大程度上決定了整個(gè)系統(tǒng)的安全性與可靠性,尋求經(jīng)濟(jì)、有效的密封裝置已成為密封領(lǐng)域設(shè)計(jì)師的主要課題。刀口式法蘭平面密封結(jié)構(gòu)(簡(jiǎn)稱刀口密封結(jié)構(gòu))具有構(gòu)造簡(jiǎn)單、高密封度等特點(diǎn),常用于對(duì)介質(zhì)密封性要求較高的金屬類包裝容器中。本文以某危險(xiǎn)品包裝容器刀口密封結(jié)構(gòu)為研究對(duì)象,利用有限元模擬進(jìn)行數(shù)值試驗(yàn),結(jié)合穩(wěn)健優(yōu)化設(shè)計(jì)方法,對(duì)該密封結(jié)構(gòu)進(jìn)行了穩(wěn)健設(shè)計(jì),得到了較為合理的設(shè)計(jì)參數(shù)組合。 首先,通過對(duì)金屬平墊密封條件的分析,建立了數(shù)值模擬中所使用的有效密封判據(jù),有效密封面寬與最大接觸壓力構(gòu)成評(píng)價(jià)不同密封結(jié)構(gòu)密封性能優(yōu)劣的重要標(biāo)準(zhǔn)。 其次,開展單因素作用下密封結(jié)構(gòu)的數(shù)值模擬分析,獲得了刀口密封結(jié)構(gòu)主要設(shè)計(jì)參數(shù)與密封性能評(píng)價(jià)指標(biāo)的關(guān)系曲線,確定了主要設(shè)計(jì)參數(shù)的取值范圍。在此基礎(chǔ)上,設(shè)計(jì)均勻數(shù)值試驗(yàn),建立以有效密封面寬和最大接觸壓力為響應(yīng)的關(guān)于各主要設(shè)計(jì)參數(shù)的二階響應(yīng)面模型,并利用遺傳算法對(duì)模型進(jìn)行單目標(biāo)、多目標(biāo)尋優(yōu),得到優(yōu)化的設(shè)計(jì)參數(shù)組合。 最后,考慮由外界條件干擾而引起的設(shè)計(jì)參數(shù)不確定性擾動(dòng),在優(yōu)化模型中添加表征目標(biāo)函數(shù)穩(wěn)健性的靈敏度附加項(xiàng),并對(duì)約束條件進(jìn)行穩(wěn)健可行性調(diào)整,將優(yōu)化模型轉(zhuǎn)換為穩(wěn)健優(yōu)化模型。通過求解,得到了較穩(wěn)健的設(shè)計(jì)參數(shù)組合,為某危險(xiǎn)品包裝容器密封結(jié)構(gòu)設(shè)計(jì)參數(shù)的確定提供了參考。
[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.
【學(xué)位授予單位】：中國(guó)工程物理研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH136

【引證文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 許煥衛(wèi);穩(wěn)健設(shè)計(jì)建模及優(yōu)化方法研究[D];大連理工大學(xué);2009年

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本文編號(hào)：2376682