裂纹对梁动力特性影响的研究

The Effects of the Beam Cracks on the Dynamic Characteristics

从简支梁着手,用线切割机预制不同深度、不同位置的裂纹,脉冲激振后录取梁上响应,在 CF—500上对信号进行频谱分析,研究梁动力特性的变化.

In this paper,the simple supported beams are taken as the model,cracks in different depth or differ- ent position are cut in advance by liner cutting macbime.The response of the beams is measured after a pulse exciting ,The frequency specturm analysis of the siynal is conducted in CF-500,So that the variation of dynamic characteris- tics of the beam can be observed and some rules can be sought out.