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霍施宇,屈超,徐健,等. 钛合金蜂窝平板声载-静载联合加载设计与试验[J]. 科学技术与工程, 2021, 21(4): 1654-1659.
HUO Shi-yu,QU Chao,徐健,et al.Acoustic-static combined loads design and test on titanium alloy honeycomb acoustic liners[J].Science Technology and Engineering,2021,21(4):1654-1659.
钛合金蜂窝平板声载-静载联合加载设计与试验
Acoustic-static combined loads design and test on titanium alloy honeycomb acoustic liners
投稿时间:2020-04-29  修订日期:2020-11-21
DOI:
中文关键词:  钛合金  蜂窝声衬  声载荷  静力载荷  疲劳试验
英文关键词:titanium alloy  honeycomb liner  sonic load  static load  fatigue test
基金项目:
           
作者单位
霍施宇 中国飞机强度研究所
屈超 中国飞机强度研究所
徐健 中国飞机强度研究所
邓云华 中国航空制造技术研究院
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中文摘要:
      为考察钛合金蜂窝声衬在噪声载荷与气动压力联合作用环境下的疲劳特性,根据蜂窝声衬的受载特征,提出了一种声载-静载联合试验方法,利用大气与真空舱之间的压力差来实现声衬的等效气动力加载,设计并制造了抽真空机械组件对试验件非受声面抽真空,解决了行波管中施加静力载荷难的问题。针对两类高度不同的钛合金蜂窝声衬平板件,开展了10小时的声载-静载联合疲劳试验,试验结果表明两类钛合金蜂窝声衬试验件一阶共振频率均没有发生的明显变化,说明试验件的整体刚度在试验前后没有发生改变。无损检测结果表明蜂窝芯较高的钛合金声衬平板试验件中部分出现了局部脱焊。
英文摘要:
      In order to investigate the fatigue characteristics of the titanium alloy honeycomb acoustic liner under the combined loads of noise and aerodynamic pressure, according to, a combined test method of sonic load and static load was proposed based on the load characteristics of the honeycomb acoustic liner. The equivalent aerodynamic load of the liner was realized by using the pressure difference between the atmosphere and the vacuum tank, and the vacuum pumping device was designed and manufactured to vacuum the non-acoustic surface of the specimen, which solves the problem of loading static pressure in traveling wave tube. Then 10 hours of sonic-static combined fatigue test was carried out on two kinds of titanium alloy honeycomb acoustic liners with different height. The results show that some of the titanium alloy honeycomb acoustic liner specimens with higher honeycomb core appeared some local welding-off areas, but the first-order resonance frequency of the two kinds of titanium alloy honeycomb acoustic liner specimens did not change significantly, which means the overall rigidity of the specimens did not change.
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