WhatsApp/Wechat:+86 15922636221
- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
Views: 19 Author: Site Editor Publish Time: 2024-10-23 Origin: Site
Definition
1. The collective name for various enclosed buildings above the upper deck.
2. Deck buildings on the freeboard deck whose width is at least 92% of the width of the ship.
3. Generally refers to all enclosed buildings on the upper deck. The "Code" refers to the enclosed building on the upper deck that extends from one side to the other side, or whose side walls are no more than 4% of the ship's width inward from the shell plate.
4. An enclosed building located above the upper deck that extends from one side to the other or whose side walls are retracted from the outer plate by no more than 4% of the ship's width. Sometimes it also refers to deck buildings including deckhouses.
Long superstructure and short superstructure
A superstructure whose length is greater than 0.15L and not less than 6 times its height is a long superstructure.
Those that do not meet the conditions for long superstructures are short superstructures.
The superstructure of passenger ships and passenger and cargo ships is a long superstructure, while the superstructure of other ships is generally a short superstructure.
Main force
1. Wave impact: When the ship encounters bad sea conditions while sailing, the superstructure will be impacted by waves, especially the forecastle floor. When the ship travels against wind and waves, among all the walls of the superstructure in the middle of the ship, the front wall will also be affected. The biggest impact.
2. Overall longitudinal bending: If the long superstructure in the middle of the ship (such as the long bridge) and the deckhouse in the middle of the ship are very long, they will bend along with the main body of the ship. The forecastle, poop and poop deck houses are less affected by the longitudinal bending.
3. Gravity: bear the structural weight of the buildings on each floor and the local loads of various machinery and equipment, such as the weight of lifeboat hangers on the lifeboat deck.
4. The inertial force generated by the rocking of the ship.
Note:
The superstructure mainly bears wave impact and longitudinal bending.
Since the main body of the ship is continuous along the length of the ship, but the superstructure is discontinuous, the structure of the hull changes suddenly near the end of the superstructure. When the ship bends longitudinally, severe stress will occur at the end of the superstructure amidships. Concentration phenomenon, if corresponding structural measures are not taken, cracks may occur in the upper deck, topside strake and side wall of the superstructure when the ship is sailing.
This requires full attention!
This article is reproduced online. Disclaimer:
Except for the original articles specifically stated, the reprinted content is only to convey more information and does not mean that this website agrees with its views. The copyright of all reprinted articles, pictures, audio/video files and other materials belongs to the copyright owner. If it involves work content, copyright and other issues, please contact us in time so that appropriate measures can be taken quickly to avoid unnecessary economic losses to both parties.
English