| 关于结构高频响应分析中有限元网格划分的细化标准 |
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| 引用本文： | 徐孝诚,尹立中.关于结构高频响应分析中有限元网格划分的细化标准[J].振动与冲击,2002,21(1):52-53,45. |
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| 作者姓名： | 徐孝诚 尹立中 |
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| 作者单位： | 北京特殊机电研究所,北京,100076 |
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| 摘 要： | 本文以周边简支方板在随机面分布力作用下振动加速度响应分析为例，用MSC/NASTRAN有限元软件研究了0-1000Hz和0-2000Hz频率范围内结构模态数和振动加速度响应均方根值随单元大小的变化规律，与解析法结合验证了由波动理论导出的单元细化标准。作为补充提出了结构模态数的单元细化标准。用相同方法对简支圆筒壳体在随机外压作用下1000-2000Hz频率范围内的加速度响应做了研究，本文提出的单元细化标准进一步得到验证。
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| 关 键 词： | 高频响应分析 有限元 网格划分 细化标准 模态数 MSC／NASTRAN 随机振动 振动加速度 结构模态数 |
On Fining Standard of FEM Meshing Used in High Frequency Structure Response Analysis |
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| Xu Xiaocheng,Yin Lizhong.On Fining Standard of FEM Meshing Used in High Frequency Structure Response Analysis[J].Journal of Vibration and Shock,2002,21(1):52-53,45. |
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| Authors: | Xu Xiaocheng Yin Lizhong |
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| Abstract: | As an example,the vibration acceleration response of the simply supported square plate loaded by random pressure is analyzed.The relations hip between number of modes,RMS of acceleration response(within 0_1000Hz and 0_2000Hz frequency bands) and the element size is studied by using MSC/NASTRAN software.As a complement,the fining standard of FEM meshing based on the number of modes is presented.The acceleration response of simply supported cylindrical shell loaded by random external pressure(within 1000_2000Hz frequency band) is also studied by the same method and the fining standard of FEM meshing presented in the paper is further confirmed. |
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| Keywords: | high frequency response analysis FEM meshing fine standard modal number MSC/NASTRAN |
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