Simulation Research On Vibration And Shock Response Of Power Driving System Of Warship Based On ADAMS

Vibration of ship's power plant is an important factor that influences the normal running of the equipments on the warship. It is also the main factor that decreases the stealth capacity of the warship. At the same time, the anti-shock capacity of the power plant and the equipments on the warship is also the significant index to evaluate the reliability and the vitality of the warship. So, the navys all over the world continue to focus on the research of the vibration characteristics and anti-shock capacity of the warship's power plant.In this paper, a dynamic simulation model of the transmission system is established based on an experiment platform of the transmission system of a warship. By using the technology of virtual prototype and FEM, three kinds of vibration of the shafting, the characteristics of the vibration isolation system and the shock response of the transmission system are simulated and analyzed. The main contents of this paper are given as following:Firstly, the 3-D entity models of the parts of the whole transmission system are established in UG by the virtual prototype technology. According to the actual connection relations of the parts, the assembled model of the system is established. Through data transfering, the assembled model in UG is imported into ADAMS, and the constraints of all the parts are added. Then the pre process of the simulation is finished.Secondly, by changing the main parts of the model such as the shafts and the shaft joints from rigid bodies into flexible bodies, the rigid-flex-body model of the system is established. Then, the torsinoal, lateral and longitudinal vibration of the shafting are simulated to get the vibration modes including the natural frequencies and the modes. Also the forced vibration responses are simulated to analyze the characteristics of the responses.Thirdly, based on the multi-rigid model, the transmission system model with vibration isolation system is established by adding spring-damper elements. Then the vibration isolation system is simulated to analyze the characteristics of the system, which provides the basis for the design of the vibration isolation system.Finally, by the theory of the underwater explosion, the explosion impact pressure curve is determined to carry on simulation and analysis in the situation that the shocks are both from the tail bearing and the vibration isolation system. According to the simulation, the response characteristics of the transmission system are obtained, which can be referenced for the design of the anti-shock of the warship.By the simulations mentioned above, a new method is proposed to analyze the vibration of the shafting, the characteristics of the vibration isolation system and the shock response of the transmission system in this paper. It is significant for the research in these fields both in theory and practice.