Broken shaft type segmented self-propelled model for ship hydroelasticity test

Abstract

The invention discloses a broken shaft type segmented self-propelled model for a ship hydroelasticity test. The broken shaft type segmented self-propelled model comprises a ship shell system, a keel beam system and a propelling system. The ship shell system comprises a segmented ship shell, a segmented deck and a base. The keel beam system comprises a keel beam and a clamp, and the propelling system comprises a motor, a propeller shaft, a propeller, a universal joint and a steering engine. According to the invention, the propeller shafts are disconnected at the subsections between the subsection ship shells and are connected through the universal joints. The universal joints can achieve normal rotation of the propeller shafts when displacement and corner deformation exist between the adjacent propeller shafts due to deformation of the hull. Therefore, the self-propelled model not only can adopt the propeller to provide power, but also can continuously segment the ship body from the bowto the stern and install the keel beam, so that the wave load at any section of the ship body from the bow to the stern can be measured. The invention relates to the technical field of ship tests.

Description

technical field [0001] The invention relates to the technical field of ship testing, in particular to a shaft-broken segmented self-propulsion model for ship hydroelasticity testing. Background technique [0002] Wave load is the most important fluid load among all external environmental loads (including wind, wave, current and other environmental loads) acting on the hull structure. Shipwreck accidents such as hull structure failure and damage caused by wave loads occur from time to time. Therefore, it is very necessary to reasonably predict the load response of the ship under the action of waves, and it is also the primary task to evaluate the safety issues such as yielding, buckling and fatigue strength of the hull structure. Since the real hull is an elastic body, the hull structure floating on the sea will move and deform under the action of waves, and the movement and deformation of the hull structure will further affect the flow field and wave force. Therefore, in t...

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Problems solved by technology

However, since the high-speed rotating paddle shaft cannot meet the deformation requirements, and the length of the paddle shaft is generally long, it is impossible to segment the hull in the area where the paddle shaft is arranged

Therefore, the self-propelled ship model that is usually used is only segmented in front of the hull shafting and the wave load is measured, while the stern still uses the entire section of the rigid hull, so the section load cannot be measured

Only simulating the elastic deformation effect of the hull structure in the front part of the hull shafting cannot fully reflect the hydroelastic vibration response of the whole ship

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