多点阵集成结构模态试验及仿真分析
Modal Test and Simulation Analysis of Multi-lattice Structure
王耀 1秦锦 1高鹏1
作者信息
- 1. 航空工业第一飞机设计研究院,西安 710089
- 折叠
摘要
以某大集成顶部控制安装板为例,对其进行了模态试验和仿真模型修正.首先介绍了模态试验的原理,并对模态试验的测量点位置、试验步骤进行了简述.然后为了多维度了解其固有振动特性,进行了不同边界状态的模态试验,具体包括内部设备装配前的自由边界状态以及设备装配后的自由边界和固支边界状态.最后通过模态指示函数验证了试验结果的准确度和精度,获取了振动模态参数(固有频率、振型、阻尼比等),并与模态仿真结果进行了对比分析.结果表明,修正后的顶部控制安装板动力学有限元模型能够用于后续的振动特性分析和优化设计.
Abstract
The work aims to carry out modal tests and simulation model correction with a large integrated top control panel as an example.Firstly,the principle,measuring points andtest proceduresof modal tests were briefly described.In order to un-derstand its inherent vibration characteristics in multi-dimensions,modal tests of different boundary states were designed,in-cluding free boundary before assembly of internal equipment,free boundary and the fixed-supported boundary after assembly of internal equipment.Finally,the accuracy of the test results were verified by modal indication function,and the vibration modal parameters(natural frequency,mode shape,damping ratio,etc.)were obtained,then the results of modal tests and modal simula-tion were compared.It is shown that the modified dynamic finite element model can be used for the vibration characteristic analysis and optimization design of the top control plate.
关键词
机载设备/集成结构/顶部控制板/模态试验/模态参数/模态仿真/振动特性Key words
airborne equipment/integrated structure/top control panel/modaltest/modal parameters/modal simulation/vi-bration characteristic引用本文复制引用
出版年
2024
NETL
NSTL
万方数据