大型捆绑火箭振动试验液体取代与支承影响修正方法

在大型捆绑火箭振动中，液体取代和支承边界影响作为结构质量和刚度的变化，对火箭振动特性有重要影响。本文采用有限元再分析法，矩阵摄动法和拓广灵敏度法，对模态试验数据进行了合理修正，并获得了满意的修正结果。研究表明，在秒状态足够多的情况下，用最小二乘曲线拟合技术修正振型斜率也是可行的。

Liquid Substitution and Suspension Influence Correction Methods for Large Scale Launch Rocket

In large scale launch rocket vibration test, liquid substitution and suspension condition effected on rocket structure vibration characteristics are very important as a variety of structural mass andstiffness. In the paper, the modal test data are properly corrected ana the very good result are obtained byusing the finite element reanalysis and the developed sensitivity analysis methods. The research resultsshow that mode shape slopes can be corrected by using the least-squares curve fit methods in a great manyof test second condition.