Research On The Anti-shock Calculation Methods Of Warship Gearbox

The non-contact underwater explosions threaten the warship survivability more and more fiercely at present. Gear box is one of the important components in the ship, whose shock resistance is related to vitality directly. Therefore, the research on shock resistance of gear box and numerical simulation of gear box is of great significance.Based on the existing shock resistance methods, namely, the static equivalent method, dynamic design analysis method and time-domain simulation method, researches are carried out separately from the shock dynamic response theory and numerical simulation in order to obtain a systematic numerical experiment method for engineering applications by comparing three methods. At the same time, the relationships between marine gearbox dynamic response characteristics and structural features, the load parameters are researched, and the same discipline of dynamic response of the same type gearbox. A resistance checking evaluation software is developed which can evaluate the shock resistance of gearbox in different design stages.Firstly, the basic theory of static load method, dynamic design analysis method and shock analysis of marine equipment in frequency domain are studied in this paper. Shock resistance numerical simulation process of three methods of anti-shock simulation is implemented by taking a gear box as example, whose dynamic response characteristics is analyzed.Secondly, based on the study of time-domain simulation method, the impact strength and shock duration time to the gearbox dynamic response is evaluated in different directions. The dynamic response characteristic disciplines are summarized by analyzing shock resistance response results of three similar structure gearboxes to give reference to the shock resistance design of gearboxes of this type.Thirdly, shock resistance checking evaluation software is developed which is an integration of static load method, dynamic shock resistance analysis method and time-domain simulation method, the output visualization can be achieved and functions can be transferred directly.