摘要
利用有限元前处理软件HyperMesh建立油烟机壳体的有限元模型,基于DOE方法对壳体厚度分布进行了试验设计,并结合有限元分析软件Nastran和声学分析软件Sysnoise计算壳体的辐射噪声,在此基础上利用优化软件iSIGHT-FD建立壳体辐射噪声的优化模型并优化。优化后,壳体的辐射声功率降低了3.66 W,4个目标点处的声压级均有不同程度的降低,其中降低最大值达到4.7 dB。
In this study a DOE（Design of Experiment）-based structural optimization method is developed to reduce the radiated noise of range hoods.First,a finite element model of a typical range hood is created using Hypermesh.Then,the surface particle velocity is carried out in Nastran,and the radiated noise is calculated by Sysnoise.Finally,the DOE-based structural optimization is preformed using iSIGHT-FD,in which the sound pressure level at four sensitive points and the radiated sound power are selected as the objective function and the thickness of four panels are adopted as design variables.In addition,the weight of the range hood as a constraint is kept no more than its original weight.As a result,a maximum radiated sound power reduction of 3.66 W and a maximum sound pressure level reduction of 4.7 dB are successfully achieved.
出处
《机械科学与技术》
CSCD
北大核心
2012年第1期146-149,153,共5页
Mechanical Science and Technology for Aerospace Engineering
关键词
油烟机
有限元
优化
辐射噪声
range hood
finite element method
optimization
radiated noise
