To analyze the vibration properties of wood -plastic composites, ANSYS software was adopted to build the finite element models for the wood-plastic composites which were intact or contained different size hole defects. Modal analysis method was employed to obtain the first eight order intrinsic frequencies and displacement modes, which were used to calculate the curvature modes. Then the effects of hole defects on the intrinsic frequencies and modal shapes of the wood-plastic composites were discussed. Results show that ANSYS software can be effectively used to analyze the vibration properties of intrinsic frequenies and modal stapes of wood-plastic composites. Hole defect has a significant effect on the intrinsic frequencies and curvature modes The intrinsic frequencies of the defective models are lower than those of the intact models, and the decrease degree increases as the defect size increases In addition, the curves of curvature modes at hole position have an abrupt jump.%为分析木塑复合板的振动特性,采用ANSYS软件分别构建了完好和含有不同大小孔洞缺陷木塑复合板的有限元模型,运用模态分析方法获取了其前8阶固有频率和位移模态,计算了其曲率模态,分析了孔洞对木塑复合板固有频率、位移和曲率模态等振动特性的影响.结果表明:利用ANSYS能够有效分析木塑复合板的固有频率、模态振型等;孔洞缺陷对木塑复合板的固有频率和曲率模态有显著影响,而对位移模态影响不明显.与完好时相比,含孔洞木塑复合板固有频率会降低,且随孔洞直径的增大,各阶固有频率的降低幅度在加大.此外,孔洞缺陷处曲率模态曲线会产生"突变".
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