摘要
根据试验要求所设计的直流式低速风洞为薄壁结构,风洞的风扇位于动力段内。运行过程中,动力电机不可避免地会将振动传到壳体上,诱导其振动,并影响风洞试验段的流场品质。针对此种现象,利用有限元分析方法,对壳体模型进行网格划分,分析风洞全流场和壳体模态,得到了风洞试验段湍流度和风洞壳体模态分析结果。结果表明,直流式低速风洞的壳体结构设计合理,模态频率分布适当,在保证低速风洞试验段流场品质满足实验要求的前提下,壳体发生共振的可能性很小。
The designed wind tunnel is straight - flow low - speed wind tunnel, and fan is installed in the power section of wind tunnel. The power motor will transmit vibration to the shell and induce its vibration, which affect the quality of flow field of test section. In view of this phenomenon, the whole flow field and shell mode of the wind tunnel were analyze by the finite element analysis method. The turbulence of the wind tunnel test section and the modal analysis results of the wind tun- nel shell were obtained. The results show that the design of the shell structure of the straight - flow low - speed wind tunnel is reasonable and the modal frequency distribution is suitable. When the flow field quality of the tow - speed wind tunnel test section meets the experimental requirements, the possibility of the resonance of the shell is very small.
出处
《现代机械》
2018年第1期11-15,共5页
Modern Machinery
基金
国家自然科学基金面上项目资助:波浪型圆柱涡激振动数值研究(No.11172220)
关键词
风洞壳体
结构设计
诱导振动
全流场分析
模态分析
wind tunnel shell, structure design, induced vibration, whole flow field analysis, modal analysis
