摘要
飞机外挂等细长体试件的两点激励振动试验方法在国内外已经开始较广泛应用。因试件动力学的复杂特性经常造成两点激励振动试验控制超差甚至无法控制,因此在试验前有必要对试件开展模态等动力学特性分析。针对某模拟外挂的试验件及试验夹具开展了有限元模态分析,在两点激励试验前对试验中容易出现控制超差的危险频率点进行了预判。随后开展的两点激励振动试验结果证明了预判的正确性以及试验前开展动力学分析的必要性。
Two-exciter vibration testing method has been widely used for slender specimens such as aircraft store. Due to the complicated dynamic characteristics of the specimens, two-exciter vibration test is difficult to control or the vibration control overshoot will occurred. So it is necessary to do modal analysis before two-exciter vibration test. The critical frequency points in the vibration testing control were prejudged based on modal analysis of the specimen. The results of two-exciter vibration test showed that prejudgments of critical frequency points are exact.
出处
《装备环境工程》
CAS
2012年第6期51-53,112,共4页
Equipment Environmental Engineering
基金
国防科工局技术基础科研项目(H112012A002)
中物院实验室装备技术基础项目(11J102)
关键词
两点激励振动试验
控制
模态
有限元
two-exciter vibration test
control
modal
finite element
