Two new ships of more than 100,000 tons, on the same day at the same shipyard on the same site, held a simple but enthusiastic groundbreaking ceremony at the same timeOf course, I didn't say what type of ship it was, and I can only understand it on my own. But certainly not a boat. After all, a shipyard has basically stopped building non-special ships of less than 100,000 tons. The question is why choose the same "auspicious day of the zodiac" to start work?In fact, it is not difficult to understand: the first is that the seasonal factor is crucial. Shipbuilding is still essentially a heavy industry category that is heavily dependent on the sky. This is because the tonnage of modern ships is very large, and it is getting bigger and bigger, starting from 200,000 tons at every turn, and it is not uncommon to have 300,000 tonsEven if it's **, it's getting bigger and bigger. People who live inland all year round may not have much idea of the size of giant ships. Let's put it this way, a 250,000-ton container liner is enough to be 400 meters long, 60 meters wide and 70 meters high. Two strips side by side can fill all the space in a medium-sized residential area. And the 100,000-ton super aviation platform,
Because of the existence of a wide flight deck, it is only a few tens of meters shorter than this type of super container ship, but the width is almost the same as the height. Because of this size, there is no ready-made factory in the world today that can fully accommodate the entire construction process of a supershipAt most, the giant canopy can only be used to temporarily block some key welds and parts that require precise construction, which is already considered the limit of the project. Therefore, the construction of mega ships is still generally carried out in the semi-open air, especially in the dry dock construction section where the mega modules are folded into a whole ship. Since it is an open-air construction, the outside temperature is too high or too low, and the time and intensity of sunshine will affect the quality of the project. Because whether it is the most ordinary marine steel or high-end composite light metal, there are problems of thermal expansion and cold contraction. This results in high-precision closing of large vessels, preferably in spring and autumn when the temperature and sunshine intensity vary minimum. In fact, it is better than the ambient temperature and the light tide conditions,
What has a greater impact on the closing quality of the ship is actually the humidity changes such as wind, rain and haze. The main concern of all ships during the closing of the ship is that after the main weld has been polished and polished with a huge amount of labor;Suddenly there is a torrential rain, then all the main and secondary welds have to be re-polished, which lasts at least 1 to 2 weeks. This is one of the reasons why tropical or quasi-tropical regions are not suitable for the development of super shipbuilding industry. If it is to be developed, it can only build some large-scale semi-enclosed factories for indoor closing. However, as a professional team that is also a large-scale steel structure, the fully enclosed workshops of the world's first-class shipbuilding enterprises are also being built larger and larger, and the number is also increasing. In this way, in addition to the main dock stage when the whole ship is closed, it is finally possible to achieve 80% of the production stage and the whole indoor environment can be controlled. To put it bluntly, it is from the cutting of the first ship plate, to the full manual welding of the small module components later, and then to the large module components to be put together into a giant section that can be finally accommodated in the workshop. All of these processes can avoid wind, rain, snow and outside temperatures
Under the influence of changes, it is finally possible to achieve quasi-year-round shipbuilding capacity without reduction. However, all processes in the plant still have to be closed for the final docking, leaving an optimal seasonal window. That is to say, either early spring or late autumn is the best time to dock. Moreover, even if the two ships start construction together, with the world's absolute largest shipbuilding strength of a shipyard, it is completely possible to complete all the plant processes within 12 to 18 months. The final docking is in the early spring or late autumn of the following year. At this time, the start of construction is also because all the shipyard work of the first complete large platform has been almost completed, and you only need to dock and dress up again to "get out of the cabinet". As for the so-called sea trials, at most it is a rough passing scene in accordance with the procedure. After all, some of the most critical systems have been tested tens of thousands of times on land without any failuresThe ejection trolley from the ship was also quickly completed within 2 weeks. Finally, there is a deck painting that doesn't have to be done at the shipyard. 
So after all the technical practices have been thoroughly understood, the rest is naturally assembly-line mass production, and it is modest to start construction of 2 ships at the same time. After all, it is not a big problem for the existing facilities of the factory to start construction of 4 ships at the same time. Some people say that there is no precedent in the world for two special large ships of more than 100,000 tons started in the same factory. If there is no precedent, then create a precedent!If you have this ability, why don't you take the initiative to show it?After all, the first factory of the Westernization Movement can finally defeat all the ships and artillery of all the powers on its own!