典型结构单轴和三轴振动响应对比研究

摘要

Objective To evaluate influences of single-axis vibration test and three-axis vibration test on vibration re-sponse of typical structure. Methods Through comparing the single-axis vibration test and the three-axis vibration test to the cantilever beam, influences of single-axis vibration and three-axis vibration on specimen from different perspectives were researched with acceleration response and dynamic strain. Results Compared with the single-axis vibration, the three-axis vibration changed the resonance frequency and the amplitude of the beam obviously. In addition, due to the cumulative vibration in three axes, the beam showed more resonance level than in single-axis vibration. Conclusion Sin-gle-axis vibration and three-axis vibration have different influences on the specimen.%目的 研究单轴振动与三轴振动对典型结构振动响应的不同影响.方法 通过单轴振动及三轴振动的对比实验,以典型结构悬臂梁为研究对象,利用加速度响应测量法及动应变测量法,从不同角度研究单轴振动和三轴振动对试品造成的不同影响.结果 相比于单轴振动,在三轴振动下试品谐振点发生改变的同时,谐振峰响应也更为明显.另外,由于三轴同振叠加耦合作用的影响,三轴振动下试品的响应量级也略大于单轴振动.结论 单轴振动与三轴振动对试品会产生不同的考核效果.