Study On The Shock Resistance Of Ship Engine Exhaust Silencer

In a war, the ships will encounter the enemy' s weapon attack inevitably. A non-contact explosion near a ship although does not break the ship hull in most cases, usually produces shock damage of on-board equipments to relatively larger extent. Whereas all the missions completed by a ship are fully relied on the operations of the shipboard equipment systems. If there is server damage on a critical system of the shipboard internal devices or equipments, the ship may lose its battle capacity. Marine device and systems are generally frailer than the ship hull when suffering a shock. Therefore research on protect design of the shipboard equipments against the shock environment is of vital significance in improving the survivability and battle capacity of the ship.To examine whether the equipment system has been designed capable to withstand the prescribed underwater explosion, it is necessary at first to clarify the shock loadings acting on it, that is the shock environment. This paper determines the shock environment imposed on the shipboard equipments by taking structural dynamic responses as input, introduces the description of the shock environment in terms of the "shock spectrum" and the procedure of converting the predicted structural dynamic responses to the design shock spectrum, describes the shock environment under various exploding cases with acceleration time history of board and doubling sine curve. Simulates the dynamic response of a ship engine exhaust silencer under various shock environment, examines the anti-shock capability of the silencer, compares and analyses the two ways of describing shock environment . The result indicates: This silencer can resist the shock under explosion in a certain severe scope. Comparing to the shock spectrum, acceleration time history can characterize the shock environment more...