STUDYING THE DIRECTIONS OF VIBRATION REDUCTION CAUSED BY POWER EQUIPMENT BASED ON MODELLING THE UNIAXIAL VIBRATION ISOLATION OF A SHIP'S DIESEL GENERATOR

Abstract

The aim of the article is to model the uniaxial vibration isolation of a ship's diesel generator to study the directions of vibration reduction caused by power equipment by increasing the efficiency of vibration isolation mounts. This goal is achieved by simulating the numerical integration of a single-axis support with the parameters of the average ship unit; the paths, movement and speed of oscillations of the ship's unit; the speed and working volume of the ship's diesel generator, which is installed on four supports. It is established that the main cause of vibration on a ship is the unevenness of the working process and the imbalance of translational masses of the propulsion system. Modern methods of calculating dynamics have made it possible to establish that the cause of increased vibration in multi-cylinder diesel engines is the moments of force and inertia of the connecting rods. When analysing the design of vibration protection supports for power equipment, the corresponding shortcomings were identified. An analytical review of recent research and publications has shown the features of many currently used vibration isolation methods. However, the known literature does not contain information on how to solve the problems of reducing vibration caused by power equipment by modelling and applying uniaxial vibration isolation for a ship's diesel generator. The most significant achievement is the graphical representation of the results of complex modelling of uniaxial vibration isolation of a ship's diesel generator, which is presented in the article. According to the results of modelling the vibration isolation of a diesel generator, it is possible to use an effective supporting force based on dry friction. The use of a weight compensator avoids resonance modes and provides a constant force equal to the weight of the equipment. This helps prevent the transmission of power equipment vibrations to the ship's foundation.