静力试验空间变形分析方法
邓长华,王 珺,吴 丹,袁军社

(液体火箭发动机技术重点实验室,陕西 西安 710100)

机架; 变形分析; 静力试验; 坐标重构; 可视化

Space deformation analysis method for static test
DENG Changhua, WANG Jun, WU Dan, YUAN Junshe

(Science and Technology on Liquid Rocket Engines Laboratory, Xi'an 710100, China)

frame; deformation analysis; static test; coordinate reconstructing; visualization

备注

液体火箭发动机机架在静力试验中,通常在关键位置布置多个位移传感器来测量机架在静力试验过程中的位移值,对所测的位移数据进行分析以确定机架是否满足刚度设计要求。由于位移传感器较多,无法直观、快速查找到可能存在的异常测点,同时由于无法可视化使得分析机架整体变形存在一定的困难,因此提出了一种静力试验结构变形的三维可视化分析方法。该方法利用结构的几何位置及测点位移信息,通过空间坐标重构连续再现结构在加载过程中的三维变形过程,形成三维变形动画,并基于Matlab软件平台开发了空间变形分析软件,可直观分析结构整体变形、快速查找位移测量异常点,同时软件分析结果可保存为文档文件和视频文件。该方法对于直观分析机架的整体变形过程,快速判断测点位移数据是否异常具有重要的工程实用价值。

In the static test of the frame of liquid rocket engine, lots of displacement sensors are usually arranged at the key positions to measure the displacement of the frame.The displacement data measured are analyzed to determine whether the frame meets the stiffness design requirements.Because of the large number of displacement sensors, it is difficult to find possible abnormal points intuitively and quickly.At the same time, it is difficult to analyze the overall deformation of the frame because of lack of visualization.So a three-dimensional visual deformation analysis technique for static test was proposed.The continuous three-dimensional deformation of the structure in the loading process was reconstructed using the geometric positions of the structure and the displacements of the measuring points.The three-dimensional deformation animation of the structure was obtained.Based on the software platform of matlab, the software of spatial deformation analysis was developed, which is intuitively to analyze the overall deformation of the structure and find the abnormal points.The results of analysis can also be saved as document files and video files.Results show that the developed technique is helpful to judge whether the displacement data of the measuring points are abnormal, and is valuable for intuitively analyzing the overall deformation process of the frame in static test.