Doomsday Bunker Upgrade

Although Chen Xin was researching and improving the emergency survival cabins, when he dismantled the used emergency survival cabins, he could see from the grid structure formed by the hardening of the non-Newtonian fluid material. Possibility of improved dome design.

Although these seem to be two things and two things that are completely irrelevant at first glance, but the two can also be said to have something in common.

The grid structure adopted by the emergency survival cabin is a complete sphere, and the structural support of the dome is also a spherical surface. In principle, the two can be regarded as the same structure.

Therefore, some of the designs used in the emergency survival cabin can actually be applied to the dome structure.

However, there is a huge difference in size between the dome structure and the emergency survival cabin. If you want to apply the technology used in the emergency survival cabin to the dome, you need to adjust the technology itself.

What Chen Xin thought of actually refers to the kind of non-Newtonian fluid material that still has a certain degree of elasticity after being impacted and hardened, and has good support performance. Is it possible to imitate the characteristics of this material to support the dome? The strength is increased while reducing the weight of the supporting structure, making the dome lighter while also being larger.

Structurally speaking, both use a triangular grid-like support structure, but they are different.

This triangular support structure is the most stable structure, so it is not uncommon to use this structure as a support, and the emergency survival cabin adopts only a flat structure, while the dome support adopts a more complex three-dimensional structure structure.

Although the single-layer planar triangular network structure is equally stable, it has a certain degree of elasticity because there is only one layer and the material itself has a certain deformation.

If you replace it with a rigid material and eliminate that little margin for deformation, it will also become extremely rigid.

From Chen Xin's point of view, this is a place that can be used.

Although the dome structure needs to be stable, in a sense it also needs a certain degree of elasticity, that is, impact resistance.

Because this is a hood covering a city, although there are very few meteorites now, in case of a meteorite impact, the dome will still bear the brunt of the impact and become the first layer of impact.

It is naturally a feasible method to strengthen the material strength of the dome as much as possible so that it can withstand the impact of meteorites.

But this will undoubtedly have high requirements for material processing, and at the same time, high requirements for materials science itself, and a large amount of expensive materials are needed to achieve this.

Although this is not unacceptable to Chen Xinhe Guo, it also lacks cost performance.

So if there are cost-effective materials that can be used to strengthen the dome structure, it is naturally the best thing.

In the dome city design drawings that have been determined so far, the material used for the dome structure support is still high-performance steel, and a triangular grid structure is constructed in the form of hollow pipes to provide sufficient support and strength.

The outer layer is made of EFTE material to make independent triangular airbags, and then spliced ​​together to form the outer layer of the dome.

The reason for this is also to resist possible meteorite impacts.

If it was a large-scale meteorite impact, there was no need to mention anything. Unless Chen Xin created an energy shield now, the entire city would be gone when a meteorite hit, and there would be no problem of whether it could resist or not.

But if it is a small meteorite, maybe even a small meteorite that is not burned out, the structure of the dome can at least act as a buffer, so that it will not cause major damage to the city under the dome.

Moreover, even if part of this separate airbag structure is damaged, the damaged part can be replaced, so that the entire dome does not need to be replaced if a hole is damaged.

Originally, only steel was suitable for such a large support structure, and other materials were not suitable for both strength and cost.

But now the emergence of this non-Newtonian liquid material has given Chen Xinxin a choice and inspiration.

The strength of this material after solidification and hardening has been tested. Although the hardness is not particularly outstanding, the toughness is very good.

Although the original development idea of ​​this material is to exist as a liquid and harden after being impacted, if you take advantage of its hardened properties, it is not impossible to use it as a material.

According to Chen Xin's idea, he wanted to use this material to weave a support structure on the surface of the triangular EFTE airbag to increase the strength of the dome.

When designing the dome structure, Chen Xin actually discussed this issue with relevant experts, but at that time he proposed to use steel wire as the material, but this would greatly increase the mass, and the steel wire itself is relatively flexible. The support strength is not enough.

Although everyone also proposed a series of possible materials such as engineering plastics and carbon fiber, it was either a cost issue or the material itself did not meet the requirements, so that the idea had to be abandoned in the end.

But now the appearance of this non-Newtonian liquid material gave Chen Xin a new choice.

He can use this material to fill the inner layer of the EFTE airbag with the same reinforced structure like an emergency survival cabin. When the EFTE airbag is impacted by external force, this layer of reinforced structure can become a support and buffer, dispersing the impact of external force. The impact brought by it strengthens the strength of the EFTE airbag.

Otherwise, the EFTE material itself is also a kind of flexible material, which cannot maintain its own shape after being damaged, which is still troublesome for the dome.

For example, some small pieces of meteorites penetrated the EFTE airbag, but in fact they only punched a small hole in the airbag. In such a case, if there is no internal strengthening support, the airbag will be completely deflated.

It is easy to find the damaged place during subsequent repairs, but it will also affect the overall performance of the dome.

But if the airbag itself has a certain strength and can still maintain its own shape even after being broken down, it can maintain the overall shape of the dome to the maximum extent without affecting performance.

And even if the meteorite is relatively large and there are many areas of breakdown, this material can be used as a reinforcement support to maintain the overall shape and structure of the EFTE airbag as much as possible, so that it will not be damaged due to the damage of the underlying steel structure support. cause large-scale subsidence.

It's just that although Chen Xin's idea is very good, it still needs to be tested whether it is practical or not.

And now Chen Xin is planning to conduct a simulation test to see if his idea will work.