【作者】 李岩；

【导师】 史荣； 王劲东；

【作者基本信息】 燕山大学 ， 机械设计及理论， 2009， 硕士

【摘要】 空间探测仪器的安装部件,是探测器的重要组成部分,安装部件设计合理与否,将直接影响探测器的测量精度及仪器的静、动态特性。另外对于空间探测仪器,一个重要的设计原则是千方百计降低仪器的重量,以满足发射与搭载要求。本文针对空间探测用磁强计、极紫外成像仪(EUVE)两种仪器的工作特性,设计了不同的安装部件,并对其进行了极端环境下的热—结构耦合分析,使其在满足仪器测量精度与机械强度的前提下,实现重量最轻的要求。本文首先依据仪器的工作原理与重量最轻原则,设计了磁强计探头安装底座及极紫外(EUV)成像仪入射窗、外筒的几何形状,选择了合适的材料,完成了安装部件的结构设计。为了得到磁强计和EUVE在发射过程中及空间极端条件下的应力变形特征,采用有限元方法,根据所研究的对象的物理特性及力学特性,确定了各种物理系数,初始条件,边界条件,建立了磁强计底座和EUVE入射窗、外筒有限元模型,利用现代分析软件ANSYS程序对其分别进行了热—结构耦合分析、静力结构分析,得到了底座、入射窗及外筒在典型工况下的应力、应变分布,确定了高应力、高位移区域,为分析安装部件设计的合理性提供可靠依据。通过对EUVE外筒不同壁厚和不同过渡圆角的结构设计做应力分析,计算了EUVE外筒应变对探头测量精度的影响,确定了该结构的最佳设计尺寸。更多还原

【Abstract】 The installed components of the space exploration equipment, which are important components of detector will have a direct impact on the measuring precision and the static and dynamic characteristics. Except that, an important design principle is doing everything possible to reduce the weight of equipment to meet the requirements of carrying and launching. In this paper, designing different installed components according to the working characteristics of the magnetometer and EUVE and doing heat-structure coupled analysis to meet the measuring precision and mechanical strength with the lightest weight.This article basing the principle of the working and lightest weight designs the magnetometer floor, the EUVE cover and tube, chooses the suitable materials and completes the structural design of the installed components.In order to get the stress and deformation characteristics when the magnetometer and EUVE are launched and under the extreme conditions, determining all kinds of physics, the initial and boundary conditions and establishing the models of magnetometer floor, EUVE cover and tube which are done the heat-structure coupled analysis and static analysis. Through it, we do not only get the stress and deformation distribution, but also identify the high-stress, high-displacement region, which will provide reliable basis for the installed components design.In this paper, doing the stress analysis to the EUVE tube which has different thickness and fillet size, calculating the tube strain which will influence the sensor accuracy, and determining the best size of the EUVE tube structure.更多还原