These supports, in addition to carrying local loads from cargo, etc, serve to keep the deck and bottom from moving toward each other as a result of longitudinal bending of the hull girder.
这些支撑，除运载来自货物等等的局部载重之外，也保持甲板和底部避免由纵向船体纵桁弯曲造成的相互位移。
2
Endurance cracks may appear in the hull structure at different ship-ages for some ships, especially at the vessel bottom and the longitudinal bone on board side.
有些船舶在不同的船龄阶段，在船体结构上出现疲劳裂纹，特别是在船底、舷侧纵骨中较为突出。
3
The bottom structure is supported by every longitudinal beam in orientation calculation, and then the orientation force and elasticity supporting force is obtained.