摘要
目的实现结构宽频域随机振动与噪声复合响应分析。方法针对噪声与随机振动复合响应分析问题,首先基于声学流体流固耦合动力学有限元分析理论,利用现有商业有限元分析软件,建立声场-结构直接耦合动力学有限元模型,采用直接法进行结构谐响应分析,获得结构不同位置的频响函数曲线,再利用频响函数曲线结合理论分析间接获得结构不同位置在随机激励下的功率谱密度曲线。结果实现了10~5000Hz随机振动与噪声复合响应分析。结论以直接法谐响应分析为基础,可实现宽频域随机振动与噪声复合响应分析。
In order to realize the numerical analysis of random vibro-acoustic.First,a dynamic model of acoustic-structure direct coupling is built based on the dynamic finite element method about acoustic-structural interaction,the frequencies response function of structural was analyzed based on a direct harmonic analysis method.Then,the Power Spectrum Density curve on random excitation is indirect get through the frequencies response function.An analysis of random vibro-acoustic is simulated in 10~5000 Hz based on the method.
作者
吴连军
陈红永
WU Lian-jun;CHEN Hong-yong(Institute of System Engineering,China Academy of Engineering Physics,Mianyang 621999,China)
出处
《装备环境工程》
CAS
2021年第3期34-37,共4页
Equipment Environmental Engineering
关键词
有限元法
随机振动
噪声
谐响应分析
频响函数
功率谱
finite element method
random vibration
noise
harmonic analysis
frequencies response function
power spectrum
