CAJ | 학술논문

提出一种新型机械振动台，分析其机构组成及工作原理，建立激振元件曲面数学方程。通过所建机构动力学方程，导出弹簧预紧量与临界频率间函数关系；进行振动台三维模型运动仿真试验，分析输出波形的频谱及功率谱，计算其加速度波形失真度；验证弹簧预紧量与临界频率间关系。试验结果表明该振动台的输出波形精度及上限频率高于传统机械振动台，且该激振方法可行、有效。
제출일충신형궤계진동태，분석기궤구조성급공작원리，건립격진원건곡면수학방정。통과소건궤구동역학방정，도출탄황예긴량여림계빈솔간함수관계；진행진동태삼유모형운동방진시험，분석수출파형적빈보급공솔보，계산기가속도파형실진도；험증탄황예긴량여림계빈솔간관계。시험결과표명해진동태적수출파형정도급상한빈솔고우전통궤계진동태，차해격진방법가행、유효。
A new type of mechanical vibration table was put forward.Mathematical equations of the vibration elements'curved surfaces were built up by analyzing the structure and working principle of the mechanical vibration table. Dynamics equations of the vibration mechanism were established and functional relationships between spring preload and critical frequencies were obtained.A 3D model of the vibration table was created and motion simulation experiments were carried out on this basis.Then,the acceleration waveform distortions were obtained by analyzing the frequency spectrums and power spectrums of the output waveforms. Meanwhile, the relationships between spring preload and critical frequencies were verified.The test results show that the precision of the vibration table output waveforms and the upper limiting frequencies are both higher than those of traditional mechanical vibration tables.Thus this kind of exciting method is proved to be feasible and effective.