中文摘要：

采用有限元方法和实验方法研究了篦齿结构对悬臂薄壁圆柱壳响应特性的影响。首先,在悬臂边界条件下,通过有限元法建立了带周向篦齿结构的三维薄壁圆柱壳模型,采用谐响应分析中的模态叠加法对受到单点谐波激振力时的响应行为进行了求解,得到了受迫响应的幅频特性曲线和悬臂端周向节点的响应特征,并通过试验测试对结果进行了验证,最后比较了带有不同的篦齿布置形式、篦齿高度和篦齿道数时薄壁圆柱壳构件的响应特性。分析结果表明,通过有限元方法和试验测试得到的悬臂薄壁圆柱壳的响应特征一致,在共振激励时的响应行为与圆柱壳结构的模态相关,由于悬臂边界条件和篦齿对整体结构刚度的作用,篦齿结构的布置形式、高度和道数对薄壁圆柱壳构件的响应特性均有较大影响。

英文摘要：

Vibration characteristics of a cantilever thin cylindrical shell with sealing teeth were analyzed by finite element method and experimental method. Firstly,a three-dimensional model of thin cylindrical shell with sealing teeth was established,and the harmonic response analysis based on modal superposition method was used to solve its response behaviors under single point excitation. Then,the amplitude-frequency curves of the forced vibration and the response characteristics of the cantilever end＇s nodes were got,and the results were verified through experimental test. Finally,the response characteristics were compared when different forms of sealing teeth arrangement,height and numbers of thin cylindrical shell were different. The results show that the response characteristics are consistent through the two methods and the response behaviors of resonance excitation associate with structural modal and sealing teeth layout,height and numbers have great influences on the response characteristics of thin cylindrical shell.