Analysis of the nodal beam isolation system based on application of helical spring

A nodal beam isolation system allows the transmission of vibration from the source to an isolated element to be limited using nodal points on the elastic beam connecting them. These points are selected in such a way that their position during vibration is constant. The application of a helical spring as an elastic beam reduces the dimensions of the system and increases its applications. An effective computational model of the nodal beam isolation system based on a helical spring application as an elastic beam is presented in the paper. The model allows the position of nodal points to be determined for a given excitation frequency. It also allows the influence of system parameters on spring vibration amplitudes and static stiffness of the connection between the source and isolated element to be analysed. The analysis makes it possible to formulate conclusions facilitating the designer to select the proper system parameters for the given operating conditions. The results of numerical and experimental tests exhibit high compliance with the results of the presented model.

Automated summary

The nodal beam isolation system limits vibration transmission from the source to an isolated element by utilizing nodal points on an elastic beam. The use of a helical spring as the elastic beam reduces system dimensions and expands applications. The computational model presented in the paper allows for determination of nodal point positions and analysis of system parameter influences on vibration amplitudes and stiffness.