复合材料充气舱体振动及衰减特性研究
发布时间：2019-01-05 19:45
【摘要】：充气舱体采用柔性复合材料构建，可柔性折叠，折叠效率高，可在轨充气展开为更大体积的空间舱体。充气舱体在轨充气展开、运行、变轨以及姿态调整过程中所受的外力作用，会引起舱体的振动，导致舱体结构的疲劳损坏和密封性降低，因此，充气舱体结构的振动特性分析及减振设计对提高其在轨运行的安全性和可靠性至关重要。 本文所研究的充气舱体由多层充气囊体组成，各囊体之间由环形充气支撑桁架相连接，充气囊体和环形充气桁架由柔性复合材料（包括碳纤维环氧复合材料、芳纶环氧复合材料）制成，入轨充气展开后刚化成为刚性舱体结构。舱体在在展开过程中及刚化后都会受到充气压力、变轨及姿态调整的推力作用，导致舱体的变形及振动。充气舱体的结构形式、尺寸及柔性复合材料刚化前后的性能等都是影响其振动特性的关键因素。首先，对柔性复合材料刚化后力学性能进行了实验研究，利用拉伸实验机测试了柔性复合材料拉伸性能，利用动态力学分析仪测试了材料粘弹性能及其随温度的变化规律。其次，研究了充气舱体在不同充气压力下受力变形特性，研究了舱体直径、壁厚等结构尺寸对充气舱体受力变形特性及承压能力的影响规律，，并进一步研究了充气舱体的振动特性，分析了充气囊体结构尺寸（内囊壁厚、外壳壁厚）、支撑框架形式、支撑框架结构尺寸等结构参数对舱体结构振动特性的影响规律。最后，对复合材料充气舱体的振动衰减特性进行了研究，研究了不同材料对舱体振动衰减特性的影响，提出了充气舱体支撑桁架的阻尼层减振设计思路，研究了阻尼层不同位置对舱体振动衰减特性的影响规律。
[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.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：V47;TB535
本文编号：2402224
[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.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：V47;TB535
【参考文献】
相关博士学位论文 前1条
1 涂奉臣;基于磁流变阻尼器的整星半主动隔振技术研究[D];哈尔滨工业大学;2010年
本文编号：2402224
本文链接：https://www.wllwen.com/guanlilunwen/gongchengguanli/2402224.html
