發(fā)布時間：2018-12-09 18:13

【摘要】：金屬橡膠以其耐高低溫、不易老化、耐腐蝕等優(yōu)良特性，成為航空航天、國防裝備等領(lǐng)域普通橡膠的最佳替代品。金屬橡膠隔振器已廣泛應(yīng)用于航空航天、國防裝備等領(lǐng)域。隨著金屬橡膠隔振器應(yīng)用的日益廣泛，對其壽命及疲勞失效的研究也越來越迫切。揭示金屬橡膠隔振器減振的內(nèi)在機理,掌握其疲勞失效的一般規(guī)律,定量地預(yù)測其工作壽命,最大限度的避免金屬橡膠因過早疲勞失效而造成重大損失,是相關(guān)研究領(lǐng)域的熱點課題和瓶頸難題。 本課題以××專項項目的具體需求為背景，以環(huán)形金屬橡膠隔振器為研究對象，開展隨機振動環(huán)境下金屬橡膠隔振器壽命預(yù)測及其相關(guān)實驗研究，分析金屬絲直徑、相對密度以及預(yù)變形對金屬橡膠隔振器疲勞壽命的影響，，建立各主要影響因素的相互關(guān)系，探索金屬橡膠隔振器的主要失效形式，建立壽命預(yù)測計算式。 通過大量的疲勞壽命實驗，構(gòu)建了金屬橡膠隔振器的疲勞壽命曲線。通過構(gòu)建壽命預(yù)測模型，研究了基于單因素和多因素的壽命預(yù)測公式。通過大量實驗數(shù)據(jù)驗證了此壽命預(yù)測公式具有很大的參考價值，能在一定范圍內(nèi)預(yù)測金屬橡膠隔振器的壽命。 針對金屬橡膠隔振器在不同應(yīng)力水平下的失效狀態(tài)，研究了具有不同金屬絲直徑的金屬橡膠元件的微觀形貌，通過對微觀金屬絲表面疲勞磨損和斷口的研究，研究了金屬橡膠元件的疲勞失效機理，提出金屬橡膠的失效為：干摩擦失效和結(jié)構(gòu)性疲勞失效。 金屬橡膠是一種各向異性的材料，為便于應(yīng)用ANSYS等有限元軟件分析，研究了環(huán)形金屬橡膠隔振器的彈性模量和阻尼比。通過ANSYS的仿真研究，研究了在隨機振動和靜應(yīng)力作用下金屬橡膠元件內(nèi)部應(yīng)力和應(yīng)變的變化，掌握了金屬橡膠內(nèi)部的受力情況。
[Abstract]:Metal rubber is the best substitute for common rubber in aerospace, national defense equipment and other fields because of its excellent properties such as high and low temperature resistance, aging resistance, corrosion resistance and so on. Metal rubber isolators have been widely used in aerospace, national defense equipment and other fields. With the increasing application of metal rubber isolators, it is more and more urgent to study their life and fatigue failure. The inherent mechanism of vibration absorption of metal rubber isolator is revealed, the general rule of fatigue failure is grasped, its working life is quantitatively predicted, and the heavy loss caused by premature fatigue failure of metal rubber is avoided to the maximum extent. It is a hot topic and bottleneck problem in related research fields. Based on the specific requirements of the 脳 脳 special project and taking the ring metal rubber isolator as the research object, the life prediction of the metal rubber isolator under random vibration and its related experimental research are carried out, and the diameter of metal wire is analyzed. The influence of relative density and predeformation on the fatigue life of metal rubber isolator is discussed. The main failure forms of metal rubber isolator are explored and the calculating formula of life prediction is established. The fatigue life curve of metal rubber isolator is constructed by a large number of fatigue life experiments. The life prediction formula based on single factor and multiple factors is studied by constructing a life prediction model. A large number of experimental data show that this formula has great reference value and can predict the life of metal rubber isolator in a certain range. Aiming at the failure state of metal rubber isolator under different stress levels, the microstructure of metal rubber elements with different wire diameters was studied. The fatigue failure mechanism of metal rubber element is studied. The failure of metal rubber is presented as dry friction failure and structural fatigue failure. Metal rubber is an anisotropic material. The elastic modulus and damping ratio of ring metal rubber isolator are studied in order to facilitate the finite element analysis such as ANSYS. The variation of stress and strain of metal rubber element under random vibration and static stress was studied by ANSYS simulation, and the internal stress of metal rubber was grasped.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB535.1

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