摘要
随机振动是航空航天器强度设计中重点关注的一个因素。采用顺序耦合法分析了典型金属翼盒结构在热环境下的随机振动响应,获得了结构模态、均方根应力云图和功率谱密度响应曲线等计算结果,并与热环境下随机振动试验结果,从数值和形态上进行了比较。结果表明,有限元仿真分析结果与试验结果在低频段吻合较好,在高频段有一定的误差,并在此基础上进一步探讨了误差产生的原因,具有一定的工程实用价值。
Random vibration environment is a key factor in aeronautic and astronautic strengthdesign which should be paid great attentions. Sequential coupling method is used to analyze therandom vibration response in thermal environment for a typical wing box. The results such asmodal, root mean square stress contour and power spectral density response are obtained to makecomparison with test results. The results reveal that analysis results match well with test results inlower frequency, but some error exists in higher frequency. Suggestions to prevent error are furtherdiscussed, which has certain engineering practice value.
出处
《工程与试验》
2017年第4期17-21,73,共6页
Engineering and Test
关键词
热环境
随机振动
模态
均方根
功率谱密度
thermal environment
random vibration
modal
root mean square
power spectral density
