摘要
轴向裂纹的存在而导致了圆柱薄壳在裂纹附近区域的局部振动,其动态特性发生了显著的变化。采用有限元方法研究了轴向裂纹尺寸对薄壳固有频率以及振型的影响规律,研究了局部振动具有自己的固有频率与独特的振型及其随裂纹长度变化的规律,解释了在相同的壳体原有振动中有可能出现裂纹长度增加而固有频率却反而上升的现象。将计算结果与实验结果进行了对比,二者吻合较好。
Tile existence of the axial crack on the thin cylindrical shell led to the local vibration around the crack, which caused the significant change of its natural frequency and dynamic characteristic. The FEM was used to analyze the influences of axial crack sizes on the natural frequencies and modal shapes of the cylindrical shell, and the local vibration＇s natural frequencies and modal shapes varied with the crack length changed. The paper also explained the phenomenon that there might be increase of the crack length in the similar shell original vibration, while the natural frequency will rise. The comparison between the results from the calculation of the FEM and the results from the experiment shows that the two results match each other approximately.
出处
《苏州科技学院学报（工程技术版）》
CAS
2012年第2期23-28,共6页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
基金
科技部国家重点实验室基础研究项目(SLPRCE-11-B-0)
关键词
轴向裂纹
圆柱薄壳
纯局部振动
动态特性
axial crack
thin cylindrical shell
complete local vibration
dynamic behavior
作者简介
申道明（1971-），男，河南信阳人，工程师，博士研究生，从事地铁振动与噪声方面研究。
