1.School of Mechanical and Automotive Eng, South China University of Technology, Guangzhou 510640,China;2.Shaoneng Group Shaoguan Hongda Gear Co., Ltd., Shaoguan 512029,China
A new type of mechanical vibration table was put forward. Mathematical equations of the vibration elements curved surface were built up by analyzing the structure and the working principle of the mechanical vibration table. Through establishing dynamics equations of the vibration mechanism, functional relationships between the amount of 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 the amount of 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 higher than traditional mechanical vibration tables. Thus this kind of exciting method is proved to be feasible and effective.