摘要
将裂纹板挠度表示为正交多项式,用分区技术的瑞利-里兹方法求解了含不同长度径向裂纹的周界固定圆板振动频率,探究了不同长度径向裂纹对圆板频谱的影响规律。实验采用小球撞击法测定了径向裂纹圆板的辐射声场频谱。结果表明,理论计算值与有限元法结果、实验结果符合较好。
The deflection of a cracked plate was expressed as the summation of orthogonal polynomials,RayleighRitz method with a subsectioning technique was adoped to obtain low mode frequencies of clamped circular plate with a differentlength radial crack.The spectra of the sound field radiated by the cracked plate were measured with collisionexcited method.The measuring frequencies are in agreement with the theoretical and FEM results.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第6期62-65,共4页
Journal of Chang’an University(Natural Science Edition)
基金
国家自然科学基金项目(19874042)
长安大学科技发展基金项目(02Q20)
关键词
径向裂纹
薄圆板
振动频率
挠度
瑞利-里兹方法
辐射声场频谱
thin circular plate
radial crack
vibrational frequency
deflection
sound field spectra
Rayleigh-Rits method
