冷质部件支撑结构中压杆的动力稳定性分析  

DYNAMIC STABILITY ANALYSIS ON COMPRESS RODS OF CRYOGENIC SUPPORT SYSTEM

作　　者：谭宁[1] 卢勃勃 陈玲莉 吴莹[1] 

机构地区：[1]西安交通大学航天航空学院机械结构强度与振动国家重点实验室,西安710049

出　　处：《动力学与控制学报》2015年第2期112-117,共6页Journal of Dynamics and Control

基　　金：ITER计划专项(2009GB104002)~~

摘　　要：冷质量支撑系统是超导托卡马克装置的一个关键部件,其在工作过程中一端处于低温而另一端处于室温.整个装置从启动到稳定工作的过程中,纵场系统从室温到低温不断变化.本文以圆杆式冷质量支撑结构中的压杆为研究对象,建立了压杆在周期性温度载荷作用下的横向振动方程,得到其第一、二不稳定区域边界.研究了阻尼对不稳定区域大小的影响,随着阻尼的增加,压杆的稳定区域较无阻尼时不断增加,而在某些不稳定区域并不能单纯依靠增加阻尼来获得动力学稳定.随后我们引入了状态反馈控制项,使得系统处于原不稳定区域的状态在较大的控制参数范围内被稳定了下来.The cryogenic support system is one of the key components of superconducting Tokamak device. In the working process, one end of the cryogenic support system is in low temperature and the other end is at room temperature. And the longitudinal field system is cyclically changing from room temperature to low temperature, when the superconducting Tokamak device is from start to stable work. This paper mainly focuses on the compress rods of the bacilliform cryogenic support system. The transverse vibration equation of a compress rod in the peri- odic temperature loads was established. The first and second category of unstable region boundary was obtained. The effect of damping on the unstable region size was studied. With the increase of damping, the stable region is increasing than the case of no damping. However, in some unstable region, the dynamic stability cannot be obtained by only relying on the increasing of damping. So, a state feedback control was introduced into the system, and the original system in unstable state can be stabilized over a large range of the controlling parameter.

关 键 词：超导托卡马克 冷质量支撑系统 压杆 稳定性 控制 

分 类 号：O347.3[理学—固体力学]