Dynamic modification of a submarine´s gearbox based on dynamic sensitivity analysis

The transmission system of submarine´s gearbox is increasingly developing in the direction of high-speed, high-efficiency, heavy-load and light-weight, and the requirements of vibration are increasing as well. The gearbox designed according to static standard often has various problems of instability and vibration which greatly weaken the behaviors of gearbox and influence the invisibility performance of submarine seriously. To improve dynamic characteristics of gearbox, a method of modifying gearbox structure is posed by analyzing dynamic sensitivity of submarine´s gearbox. And the effect caused by different design parameters of gearbox on modal frequency are studied and discussed. The method and conclusions can be used as a reference of dynamic modification of gearbox.