中文摘要：

运用 ANSYS 软件建立有限元模型，结合胞元法对高体分 SiCp ／Al 复合材料比阻尼能力进行了研究。结果表明，SiCp ／Al 复合材料比阻尼能力值在应变幅值较小时为零，当应变幅值超过临界点后，比阻尼能力值随着应变幅值的增长迅速升高。增强体颗粒形状对 SiCp ／Al 复合材料比阻尼能力值影响较大，更大的应变和大应变面积会提高比阻尼能力值。SiCp ／Al 复合材料模型的平均弹性模量随应变幅值增长而下降的趋势与模型的阻尼能力值随应变幅值增长而增加的趋势表现出相似性。

英文摘要：

The damping capacity of high volume fraction SiCp /Al composites is studied by establishing the finite ele-ment model with ANSYS,combined with the unit cell method.The results show that the damping capacity value of SiCp /Al composites is zero when the strain amplitude is small.However,when strain amplitude is over the critical point,the damping capacity value increases rapidly with the growth of strain amplitude.The reinforcing particle shape has large influ-ence on the damping capacity value of SiCp /Al composites,and larger strain and more large strain area can improve the damping capacity value.The average elastic modulus of SiCp /Al composite model declines when strain amplitude grows, which shows the similarity with the tendency that the damping capability of the model increases as the strain amplitude grows.