This paper presents a mathematical model of an electro-hydraulic vibratory exciter used for vibration testing of steel piles on coral reefs. Based on this model of electro-hydraulic vibrator, we have built characteristic curves to evaluate the stability of the system, the quality of the transition process, as well as parameters - amplitude, frequency. The research results are the scientific basis for design of electro-hydraulic vibratory exciter for vibration testing of steel piles in the coral foundation.
Keywords: vibration exciter, electro-hydraulic vibrator, frequency