Method of analysis of vibroinsulated systems under dynamic loads of equipment transient modes is given in the article. Vibroinsulated systems are considered as systems with three degrees of freedom. The method is based on using impulse transfer functions which are system responses to unit impulses. Transfer functions formulas obtained by the author were used for construction of impulse transfer functions formulas. The algorithm is based on method developed by professor Yu.T. Chernov. Examples of analysis showed stability and convergence of method. The same approach can be applied for analysis of vibroinsulated systems under arbitrary loads using presented impulse transfer functions formulas.

The paper presents a method of the vertical oscillations analysis for vibrationisolated systems with three degrees of freedom — a method of using transfer functions. The formulas for transfer functions are obtained. The case study (equipment, considered as a system with two degrees of freedom, and the dynamic vibration absorber) is designed using the method described above and the proven method of «normal» forms. The diagrams of the system lower-mass vibrations with and without damper are presented.