【摘要】：充氣艙體采用柔性復(fù)合材料構(gòu)建，可柔性折疊，折疊效率高，可在軌充氣展開為更大體積的空間艙體。充氣艙體在軌充氣展開、運(yùn)行、變軌以及姿態(tài)調(diào)整過程中所受的外力作用，會(huì)引起艙體的振動(dòng)，導(dǎo)致艙體結(jié)構(gòu)的疲勞損壞和密封性降低，因此，充氣艙體結(jié)構(gòu)的振動(dòng)特性分析及減振設(shè)計(jì)對(duì)提高其在軌運(yùn)行的安全性和可靠性至關(guān)重要。 本文所研究的充氣艙體由多層充氣囊體組成，各囊體之間由環(huán)形充氣支撐桁架相連接，充氣囊體和環(huán)形充氣桁架由柔性復(fù)合材料（包括碳纖維環(huán)氧復(fù)合材料、芳綸環(huán)氧復(fù)合材料）制成，入軌充氣展開后剛化成為剛性艙體結(jié)構(gòu)。艙體在在展開過程中及剛化后都會(huì)受到充氣壓力、變軌及姿態(tài)調(diào)整的推力作用，導(dǎo)致艙體的變形及振動(dòng)。充氣艙體的結(jié)構(gòu)形式、尺寸及柔性復(fù)合材料剛化前后的性能等都是影響其振動(dòng)特性的關(guān)鍵因素。首先，對(duì)柔性復(fù)合材料剛化后力學(xué)性能進(jìn)行了實(shí)驗(yàn)研究，利用拉伸實(shí)驗(yàn)機(jī)測(cè)試了柔性復(fù)合材料拉伸性能，利用動(dòng)態(tài)力學(xué)分析儀測(cè)試了材料粘彈性能及其隨溫度的變化規(guī)律。其次，研究了充氣艙體在不同充氣壓力下受力變形特性，研究了艙體直徑、壁厚等結(jié)構(gòu)尺寸對(duì)充氣艙體受力變形特性及承壓能力的影響規(guī)律，，并進(jìn)一步研究了充氣艙體的振動(dòng)特性，分析了充氣囊體結(jié)構(gòu)尺寸（內(nèi)囊壁厚、外殼壁厚）、支撐框架形式、支撐框架結(jié)構(gòu)尺寸等結(jié)構(gòu)參數(shù)對(duì)艙體結(jié)構(gòu)振動(dòng)特性的影響規(guī)律。最后，對(duì)復(fù)合材料充氣艙體的振動(dòng)衰減特性進(jìn)行了研究，研究了不同材料對(duì)艙體振動(dòng)衰減特性的影響，提出了充氣艙體支撐桁架的阻尼層減振設(shè)計(jì)思路，研究了阻尼層不同位置對(duì)艙體振動(dòng)衰減特性的影響規(guī)律。
[Abstract]:The inflatable cabin is constructed of flexible composite material, which can be folded flexible, with high folding efficiency, and can be inflated into a larger volume of space cabin in orbit. The external force in the course of inflating, running, changing orbit and adjusting the attitude of the aerated cabin will cause the vibration of the cabin, which will lead to the fatigue damage of the cabin structure and the decrease of the sealing ability. The vibration characteristic analysis and damping design of aerated cabin structure are very important to improve the safety and reliability of on-orbit operation. In this paper, the aerated cabin is composed of multi-layer aerated airbags, each thicket is connected by annular inflatable support truss, and the air-filled body and annular inflatable truss are composed of flexible composite materials (including carbon fiber epoxy composite). Aramid epoxy composite is made of rigid bulkhead structure. The bulkhead will be subjected to the thrust of inflatable pressure, orbit change and attitude adjustment during and after development, resulting in the deformation and vibration of the cabin. The structure, size and properties of the flexible composite are the key factors affecting the vibration characteristics of the aerated cabin. First of all, the mechanical properties of the flexible composites after stiffening were studied experimentally. The tensile properties of the flexible composites were tested by a tensile tester, and the viscoelastic energy and its variation with temperature were measured by dynamic mechanics analyzer. Secondly, the deformation characteristics of inflatable cabin under different inflatable pressure are studied, and the influence of cabin diameter and wall thickness on the mechanical deformation characteristics and bearing capacity of inflatable cabin is studied. The vibration characteristics of the aerated cabin are further studied, and the influence of the structure parameters such as the thickness of the inner capsule wall, the thickness of the shell wall, the form of the bracing frame and the structure size of the bracing frame on the vibration characteristics of the cabin structure is analyzed. Finally, the vibration attenuation characteristics of composite aerated cabin are studied, the effects of different materials on the vibration attenuation characteristics of the cabin are studied, and the design idea of damping layer of the aerated cabin supporting truss is put forward. The effects of different damping layers on the vibration attenuation characteristics of the cabin are studied.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：V47;TB535

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相關(guān)博士學(xué)位論文 前1條

1 涂奉臣;基于磁流變阻尼器的整星半主動(dòng)隔振技術(shù)研究[D];哈爾濱工業(yè)大學(xué);2010年

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