發(fā)布時間：2018-07-06 16:54

  本文選題：碳纖維復(fù)合材料 + 基座��； 參考：《武漢理工大學(xué)》2015年碩士論文

【摘要】：常用的隔振基座結(jié)構(gòu)大多使用碳素鋼等材料生產(chǎn)制成,此類材料質(zhì)量大,極大的增加了隔振基座的整體重量,其材料比剛度低、結(jié)構(gòu)阻尼小,不利于抑制隔振基座共振頻率處的振動傳遞,這些都極大的限制了隔振基座的使用范圍。而隨著國家的發(fā)展,社會對隔振基座隔振性能要求越來越高,尤其是軍用隔振結(jié)構(gòu),其工作環(huán)境更復(fù)雜且隱身性能要求高。碳纖維復(fù)合材料因其比強(qiáng)度大、比剛度大、固有頻率高、阻尼大等優(yōu)越的靜動態(tài)特性,目前廣泛運(yùn)用于各類結(jié)構(gòu)件的制造中。由碳纖維復(fù)合材料制成的碳纖維基座不僅可以大幅減輕其質(zhì)量,而且具有高強(qiáng)度、抗沖擊、易維修、減振性好、以及低噪音等諸多優(yōu)點(diǎn)。本文運(yùn)用碳纖維復(fù)合材料制作了碳纖維基座結(jié)構(gòu),同時對其隔振性能進(jìn)行了研究。本文選用功率流為隔振效果評價方法,結(jié)合有限元分析方法,探討了材料剛度及阻尼對基座隔振效果的影響。其次,本文選取不同鋪層方式,運(yùn)用有限元分析軟件探討了鋪層參數(shù)對碳纖維復(fù)合材料基座隔振性能的影響。接下來,在綜合考慮層合板設(shè)計準(zhǔn)則及制作成本的基礎(chǔ)上,本文制作了0°/90°對稱鋪層碳纖維基座,搭建了基于不同材料基座(碳纖維復(fù)合材料、碳素鋼材料)的隔振試驗平臺,運(yùn)用三維建模軟件對其進(jìn)行了建模,利用有限元分析方法結(jié)合相關(guān)測試試驗對基于不同材料基座的隔振試驗平臺的固有振動特性進(jìn)行了研究,探究了碳纖維基座對隔振試驗平臺固有振動特性的影響。本文的最后分別利用激振電機(jī)和電磁激振器對不同材料基座進(jìn)行了激振試驗,通過與傳統(tǒng)鋼質(zhì)基座的隔振性能進(jìn)行對比分析,探究了碳纖維復(fù)合材料對基座結(jié)構(gòu)隔振性能的影響。分析結(jié)果表明:在研究頻段范圍內(nèi),碳纖維復(fù)合材料基座的隔振性能在大多數(shù)頻段優(yōu)于鋼質(zhì)基座,同時,其共振頻率處的振動傳遞性能優(yōu)于同尺寸的鋼質(zhì)基座。將碳纖維復(fù)合材料應(yīng)用于隔振基座中能顯著提升其隔振性能。
[Abstract]:The commonly used vibration isolation pedestal structure is mostly made of carbon steel and other materials. This kind of material is of high quality and greatly increases the overall weight of the vibration isolation pedestal, and its material is low in stiffness and structure damping. It is unfavorable to restrain the vibration transfer at the resonance frequency of the vibration isolation base, which greatly limits the use range of the vibration isolation base. With the development of the country, the society demands more and more isolation performance of the base, especially the military isolation structure, its working environment is more complex and the stealth performance is higher. Carbon fiber composites (CFRP) are widely used in the manufacture of all kinds of structural parts because of their excellent static and dynamic characteristics such as high specific strength, high specific stiffness, high natural frequency and large damping. The carbon fiber base made of carbon fiber composites not only can greatly reduce its quality, but also has many advantages, such as high strength, impact resistance, easy maintenance, good vibration absorption and low noise. In this paper, carbon fiber base structure is fabricated with carbon fiber composite material and its vibration isolation performance is studied. In this paper, the influence of material stiffness and damping on the isolation effect of base is discussed by using power flow as the evaluation method of vibration isolation effect and the finite element analysis method. Secondly, in this paper, the influence of layer parameters on vibration isolation performance of carbon fiber composite (CFRP) base is discussed by using finite element analysis software. Then, on the basis of considering the design criteria and production cost of laminated plates, this paper makes a 0 擄/ 90 擄symmetrical laminated carbon fiber pedestal, and builds a vibration isolation test platform based on different material bases (carbon fiber composite material, carbon steel material). The 3D modeling software is used to model it. The inherent vibration characteristics of the vibration isolation test platform based on different material base are studied by using finite element analysis method and related test. The influence of carbon fiber pedestal on the natural vibration characteristics of vibration isolation test platform is investigated. In the end of this paper, the exciting test of different material base is carried out by using the exciting motor and the electromagnetic exciter, and the vibration isolation performance of the traditional steel base is compared with that of the traditional steel base. The effect of carbon fiber composite on vibration isolation of base structure was investigated. The results show that the vibration isolation performance of carbon fiber composite base is superior to that of steel base in most frequency bands, and the vibration transfer performance at resonance frequency is better than that of steel base of the same size. The application of carbon fiber composite in vibration isolation base can improve its vibration isolation performance.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB33;TB535

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本文編號：2103489