According to different uses, bulkheads can be divided into the following categories:
Watertight bulkhead is a kind of bulkhead that is impervious to water under specified water pressure. Watertight bulkhead is an important invention of ancient shipbuilding technology in China. Its appearance gave birth to watertight bulkheads, which made the ship have enough buoyancy and stability when it was damaged. Watertight bulkheads can strengthen the hull and increase its structural strength. Second, watertight bulkheads closely separate the cabins. During the voyage, even if one or two cabins are damaged and water enters, water will not flow to other cabins. Thirdly, the watertight bulkhead is used to divide the cabin into many compartments, which makes the loading, unloading and management of goods more convenient. The number of watertight bulkheads varies according to the type and size of the ship. The cargo hold and engine room of a large ship have at least 3-4 watertight bulkheads to ensure the unsinkability of the ship.
Oil-tight bulkhead is an oil-tight bulkhead under specified water pressure.
Fire partitions are used to separate fire zones and prevent the fire from spreading.
Light bulkhead is a kind of bulkhead that has no requirements for tightness, strength and fire prevention, and only serves to separate compartments. However, light bulkheads should also have certain rigidity. Usually, light bulkheads are made of stiffened plates. Generally, light bulkheads are used in superstructure.
The bulkhead is made into a swing shape, and there are running holes on the bulkhead, through which seawater can flow freely, thus stopping the swing.
According to different structures, bulkheads can be divided into two types: plane bulkheads and trough bulkheads:
Plane bulkhead consists of bulkhead plate and skeleton. The bulkhead is composed of several steel plates arranged horizontally. The pressure under the diaphragm is high, so the lower diaphragm is thicker. There are two kinds of skeletons: trusses and stiffeners. Truss is a large skeleton, usually consisting of T-shaped sections or folded plates. Stiffener is a small skeleton, which consists of folded plates or angle steel.
Trough bulkhead is formed by pressing steel plate, and its cross-sectional shape has triangle, rectangle, trapezoid and arc. Among them, trapezoidal section is widely used. (stone) according to
Harbin Engineering University Press, published in 2006, edited by Xiong Shitao, Introduction to Ships.