飞机地面振动试验激振方案优化与工程验证

V216.2; 地面振动试验是飞机型号研制与强度验证中的重要环节,在试验设计阶段一个合理的激振方案能够显著缩短后续试验周期,提升模态辨识精度.基于飞机有限元模型采用QR分解对激振位置进行考虑试验目标的全局规划,进而引入模态参与对激振点布置方案的激振效率进行定量评估,同时针对密集模态测试问题,采用多变量模态指示函数对激励力矢量进行优化,并将上述方法应用于小型通用飞机地面振动试验中,验证优化后激振位置规划方案及密集模态识别方法的工程应用效果.结果表明:本文采用的激振方案优化方法能够显著提升试验效率,降低了密集模态辨识难度,具有较高的工程应用价值....

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Published in航空工程进展 Vol. 15; no. 5; pp. 114 - 134
Main Authors 陈浩宇, 王彬文, 宋巧治, 李晓东
Format Journal Article
LanguageChinese
Published 中国飞机强度研究所 航空声学与振动航空科技重点实验室,西安 710065 01.10.2024
中国飞机强度研究所 强度与结构完整性全国重点实验室,西安 710065
Subjects
模态识别
地面振动试验
激振力矢量
exciting force vector
QR decomposition
ground vibration test
modal identifica-tion
模态参与
QR分解
mode participation
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Abstract V216.2; 地面振动试验是飞机型号研制与强度验证中的重要环节,在试验设计阶段一个合理的激振方案能够显著缩短后续试验周期,提升模态辨识精度.基于飞机有限元模型采用QR分解对激振位置进行考虑试验目标的全局规划,进而引入模态参与对激振点布置方案的激振效率进行定量评估,同时针对密集模态测试问题,采用多变量模态指示函数对激励力矢量进行优化,并将上述方法应用于小型通用飞机地面振动试验中,验证优化后激振位置规划方案及密集模态识别方法的工程应用效果.结果表明:本文采用的激振方案优化方法能够显著提升试验效率,降低了密集模态辨识难度,具有较高的工程应用价值.
AbstractList V216.2; 地面振动试验是飞机型号研制与强度验证中的重要环节,在试验设计阶段一个合理的激振方案能够显著缩短后续试验周期,提升模态辨识精度.基于飞机有限元模型采用QR分解对激振位置进行考虑试验目标的全局规划,进而引入模态参与对激振点布置方案的激振效率进行定量评估,同时针对密集模态测试问题,采用多变量模态指示函数对激励力矢量进行优化,并将上述方法应用于小型通用飞机地面振动试验中,验证优化后激振位置规划方案及密集模态识别方法的工程应用效果.结果表明:本文采用的激振方案优化方法能够显著提升试验效率,降低了密集模态辨识难度,具有较高的工程应用价值.
Abstract_FL Ground vibration test is an important part of aircraft model development and strength verification.In air-craft ground vibration test,an appropriate excitation scheme can significantly shorten the test's period and improve the accuracy of mode identification.In this paper,QR decomposition based on the finite element model is used for global planning of exciter placement,and mode participation is introduced to evaluate the plan's exciting efficiency.The multivariate mode indicator function is used to optimize the exciting force vector for closely spaced modes.Fi-nally,these methods are verified in a small general aircraft's ground vibration test,which significantly improves the test's efficiency and reduces the difficulty of closely spaced modes identification.The excitation scheme optimization method adopted in this article has high engineering application value.
Author 王彬文
宋巧治
陈浩宇
李晓东
AuthorAffiliation 中国飞机强度研究所 航空声学与振动航空科技重点实验室,西安 710065;中国飞机强度研究所 强度与结构完整性全国重点实验室,西安 710065
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Author_FL WANG Binwen
LI Xiaodong
CHEN Haoyu
SONG Qiaozhi
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DocumentTitle_FL Optimization and engineering verification of excitation scheme for aircraft ground vibration test
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Keywords 模态识别
地面振动试验
激振力矢量
exciting force vector
QR decomposition
ground vibration test
modal identifica-tion
模态参与
QR分解
mode participation
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PublicationTitle 航空工程进展
PublicationTitle_FL Advances in Aeronautical Science and Engineering
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Publisher 中国飞机强度研究所 航空声学与振动航空科技重点实验室,西安 710065
中国飞机强度研究所 强度与结构完整性全国重点实验室,西安 710065
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Title 飞机地面振动试验激振方案优化与工程验证
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