Method for improving antishock performance of double-layer vibration isolating system

Abstract

The invention provides a method for improving the impact resistance of a double-layer vibration isolation system. Place the semi-active vibration absorber on the marine power equipment in the double-layer vibration isolation system, and set the optimal anti-shock parameters of the semi-active vibration absorber according to the parameters of the double-layer vibration isolation system; judge the working environment of the double-layer vibration isolation system , to see whether it is in the shock state or the vibration working state; when the shock does not come, the double-layer vibration isolation system is in the vibration working state; when the shock comes, the double-layer vibration isolation system is in the shock state; when the shock is over , the double-layer vibration isolation system changes from the impacted state to the vibration working state, and the operating frequency of the semi-active vibration absorber also changes from the best anti-shock operating frequency to the main vibration frequency of marine power equipment. The invention has two functions of anti-shock and vibration reduction, and has short response time, which can meet the instantaneous requirement for impact control, and the overall performance of the double-layer vibration isolation system after using the invention can be effectively improved.

Description

(1) Technical field [0001] The invention relates to a vibration reduction and anti-shock method for propulsion power equipment or devices on board a ship. (2) Background technology [0002] The working environment of marine power equipment is that shock and vibration exist at the same time. In recent years, with the development of modern weapon technology, the explosion equivalent and impact duration of underwater explosions have increased significantly, and the hit rate has also increased. The threat to marine equipment is also more serious. Improve the impact resistance of marine power equipment It has become an urgent need to ensure the vitality of modern ships. [0003] At present, in order to improve the radiation of the vibration of marine power equipment to the hull, vibration isolators are usually used between the equipment and the hull foundation. However, due to structural limitations in design, the vibration isolation performance of the double-layer vibration iso...

AI Technical Summary

Problems solved by technology

[0003] At present, in order to improve the radiation of the vibration of marine power equipment to the hull, vibration isolators are usually used between the equipment and the hull foundation. However, due to structural limitations in design, the vibration isolation performance of the double-layer vibration isolation system is ideal. However, the impact resistance often cannot meet the actual requirements.

At present, in order to improve the impact performance of the double-layer vibration isolation system, the method of installing limiters in the double-layer vibration isolation system is often used in actual engineering, but it also introduces new problems at the same time: if the equipment hits the limit when it is impacted The positioner will produce a secondary impact, making the impact process into a complex strong nonlinear problem, increasing the difficulty of research

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