Dynamics modeling method for multi-input multi-output gear transmission system

Abstract

The invention discloses a dynamics modeling method for a multiple-input-multiple-output gear transmission system. The dynamics modeling method comprises the following steps of S1, dividing the multiple-input-multiple-output gear transmission system into a plurality of sub transmission systems; S2, performing rigid body modeling on components in each sub-transmission system, and assembling the components to form a sub-system model; S3, simplifying the coupling into a multi-degree-of-freedom spring with rigidity and damping, and connecting the subsystem models through the coupling to form an overall model of the multi-input multi-output gear transmission system; s4, performing multi-body dynamics simulation analysis on the overall model to obtain discrete data of wave power and fluctuation torque at the multi-degree-of-freedom spring; s5, performing numerical fitting on the discrete data to obtain a time-varying fluctuation function; and S6, establishing a centralized mass dynamic modelof each subsystem, and adding the wave function into a degree-of-freedom equation of a node corresponding to the centralized mass dynamic model to obtain a decoupled subsystem dynamic model. The method is simple in modeling and high in solving speed.

Description

Technical field [0001] The invention belongs to the technical field of dynamics analysis, and specifically relates to a dynamic modeling method of a multi-input multi-output gear transmission system. Background technique [0002] The marine combined power transmission device is the core equipment of marine vessels. It is mainly composed of multiple gearboxes connected in series or in parallel to form an integral gear transmission system, which means that the marine gear transmission system is a typical multi-input multi-output gear transmission. system. The noise generated by the gear transmission system vibration will affect the radiated noise of the ship transmission device. Therefore, how to reasonably establish the dynamic model of the ship gear transmission system is the basis for studying the influence law of the gear transmission system vibration and is also the optimization of the design of the ship gear transmission system basis. [0003] The existing modeling methods fo...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a dynamic modeling method of multi-input multi-output gear transmission system, which solves the drawbacks of the original overall system dynamics model due to the characteristics of multi-degree-of-freedom and multi-frequency excitation. Existing commercial software performs rigid body modeling for complex systems, calculates the boundary conditions of the coupling model, and then applies it to the decoupled dynamic model based on the generalized finite element model, which improves the calculation efficiency of the system dynamic response, and at the same time The model obtained based on the multi-body dynamics method has a high degree of visualization and is easy to modify, which can reduce the difficulty of operation for researchers and save manpower

Images