Chapter 462 Don’t hang yourself from a tree, there are ways
The new main battle tanks that are about to be equipped in the East and West, whether it is T-62 or M-60, can carry turret top armor and hull top armor. If they can't keep up with this depth of penetration, of course, in the unlikely event of hitting the side armor or the top of the front armor penetrating downwards and vertically, they are lucky.
The penetration depth of 80mm, let alone the current ones, as long as you are not crazy enough to explode on top of your head like Lao Maozi, even tanks decades from now can still hit it. The armor on the top of the tank body is brittle. Very.
As for the top of the head, it can't be hit even with a penetration depth of 150mm, so it's a waste.
Otherwise, everyone wouldn’t have worked hard to conquer the top in the future, and there would even be a magical structure like Sweden’s Bill anti-tank missile.
Moreover, in addition to tanks, the targets of terminally sensitive bombs also include armored vehicles, equipment vehicles, etc. These things, under a penetration depth of 80mm, are all equal.
However, Professor Luo obviously felt unsatisfied.
"Mr. Gao, can you think of a way to make it higher? I analyzed it based on the material requirements for the drug-type cover you mentioned, and I think tantalum is OK."
"Expensive , and there is less of it, so it should be used elsewhere. "Gao Zhendong is very clear about the distribution of tantalum. Our country later discovered it, and the amount was quite large, but it was not much at this time.
If the tantalum shield is designed well, it is true that the penetration depth is about 30% higher than that of copper, but again, this thing is not necessary. It is not the only thing that can improve the penetration depth. There are so many materials with deep penetration.
However, Gao Zhendong had already prepared. He added: "But don't worry, just use copper first, it will penetrate deeply enough. If the situation develops and it is necessary, I have other materials on hand that can replace tantalum. ”
If you don’t have good technology and can only scrape together materials, or if you are a little ignorant, or if tantalum is easy to obtain, then you have to stick to tantalum. However, we have done the opposite in terms of EFP medical masks, and the technology is good. In the early days, tantalum was not enough, so there was no need for that thing.
Gao Zhendong started working on materials not long after he started his career. It was not just a whim. However, the process used for medical masks is different, but Gao Zhendong happens to know this process.
After listening to Gao Zhendong’s words, Professor Luo felt relieved. The 80mm penetration depth of copper was indeed enough.
The main reason is that he has just started to do it now, and he is afraid that there will be some reasons in the middle that will further affect the penetration, which may not be enough, so he just needs insurance.
It has to be Mr. Gao, who has already thought about it, and has also taken into account cost, performance, and material sources. Unlike himself, he can only hang himself on the tantalum tree.
Gao Zhendong also made a suggestion: "You can work hard on the charge structure and charge density. There is still potential."
The charge structure will affect the penetration depth. When the charge type and structure are certain, the charge density directly affects the armor-piercing power.
One word woke up the dreamer: "Mr. Gao, when you said this, I remembered that there is indeed room for improvement in charge density and charge quality!"
Gao Zhendong I do know that there is a technology somewhere, and I prompted others to come up with it. I heard that they also listed themselves in the results. It may be useful to Professor Luo, but it is difficult to say directly now. I have to ask.
"I do know something that may be useful to you, but I have to ask first. You know the discipline, haha." Gao Zhendong smiled.
Professor Luo did not expect that there would be an unexpected surprise, and thanked him repeatedly: "Mr. Gao, thank you so much. There are so many ways to improve the power. I don't even think about it. I just lazy and change materials, or I haven’t kept up with my thinking, haha.”
Because he first brought up the issue of the warhead, Gao Zhendong told him about it first, and now that it was almost done, Gao Zhendong turned back to talk about the terminally sensitive bomb. Coming to the overall structure.
Although the overall structure looks simple, poor design can be fatal.
Lao Maozi's terminally sensitive ammunition is a strange example. Their SPBE-D arranges the sensor next to the warhead, parallel to the warhead, resulting in about one-third of the ammunition caliber being captured by this sensor. It's a waste. While our and Citigroup's terminally sensitive ammunition can be inserted into the 155mm gun, his can only be inserted into large-caliber ammunition such as bombs.
As for the reason why Lao Maozi's 155 can't be stuffed in because the copper mask is not as powerful as tantalum, it is stupid, big, black and thick. It is not to say that it is all nonsense, at least it is biased.
Lao Maozi is not that frustrated in the design of ammunition. It is not impossible to do tantalum. It is not that they cannot design or obtain the structure of the ammunition we and Citigroup used. It is a terminally sensitive bullet. In the 1980s, the appearance and structure were already all over the country's "Three Major Knowledges".
When it comes to the final result, it is more appropriate to say that Lao Maozi considered it all. He probably didn't want to use this thing on the barrel artillery from the beginning, and simply made it bigger.
And when I started working on this thing, Lao Maozi was already dying, and weird things could happen.
But all said and done, Lao Maozi’s thing is still very weird.
Gao Zhendong called a few people over and told them his ideas about the structure of the terminally sensitive bomb. It's actually very simple. Pictures of this thing are everywhere on the Internet. The front is the warhead, the back is the detector and controller, and the back is the parachute.
At first glance, the optical window of the sensor is blocked by the warhead, and the two axes cannot be parallel. The wonderful thing is that after the submunition is ejected, the warhead will go around Rotate an eccentric axis 180 degrees, thus exposing the optical window of the sensor, and ensuring that the two axes are parallel, and even the distance between the two axes is closer than that of Lao Maozi , which is undoubtedly beneficial to playing more accurately.
Before Gao Zhendong came up with this structure, to be honest, both Lu Gong and Professor Luo were worried about the structure of this terminally sensitive bomb, mainly because the caliber was too small.
It’s 110mm, and it’s really impossible to arrange sensors.
This time Gao Zhendong drew this simple eccentric shaft structure, and all the problems were solved.
“Mr. Gao, your structure is amazing!”
“Yes, I was worried, and I couldn’t think of a solution after thinking about it for a long time. What a coincidence.”
“The structure is simple, but it can solve the problem!”
“And this structure, once unfolded, can naturally solve the problem of the scanning angle of the infrared detector by relying on the fixed relationship between the two centers of gravity. Designed specifically.”
"..."
Gong Lu and Professor Luo were full of praise, and they remembered the fear of being dominated by the many whimsical ideas related to structure that Gao Zhendong had come up with before.
For example, the orthogonal four-element detector, and the front-mounted launcher of the gun-mounted grenade launcher...
After the two people admired for a while, Professor Luo's biggest problem was solved, and Lu Gong took the published the results of his preliminary work.
“For target detection and firing, my consideration is to set a lower limit of the temperature difference with the background, and use the holding circuit to record a certain amount of over-limit data values. According to the relationship between these over-limit values and the over-limit The number of times and other data should be combined with the projectile rotation data to detonate the ammunition according to a certain rule. As for this rule, it still needs to be studied and tested. "
LuGong is indeed engaged in infrared detection. It has already come up with some methods, and these methods can be solved using analog-digital hybrid circuits. They do not necessarily require the use of computers. As for whether they are useful or not, they still need to be studied and tested.
For this, Gao Zhendong nodded and did not express any further opinions. Lu Gong had his own experience in this area, so just let him use it freely. This was not what Lu Gong wanted to discuss.
“I have thought that according to the dispersion pattern and dispersion of this ammunition, we can actually ignore the problem of distinguishing repeated scanning of multiple ammunition against the same target. At most, several rounds of ammunition will hit the same target at the same time. , it’s also profitable.”
Lu Gong simply gave up on repeated target recognition, which was unnecessary.
"Well, your idea makes sense. Focus on the big ones and let go of the small ones. If it is difficult to solve, there is no need to solve it. And with reasonable spreading density and spreading distribution, combined with the designed scanning range, this problem can be solved to a considerable extent. Solved.”
The resolution problem of repeated scanning of multiple bombs involves issues such as communication between bombs. It is very troublesome to solve, and it is not a big deal in the first place. To spend a lot of effort and high cost to solve it is purely because I am full.
“The rest is the biggest problem: the ignition point and avoiding secondary attacks. I have thought about this for a long time. I can set an upper temperature difference limit. Once this temperature difference limit is exceeded, it can be determined as the ignition point or the The target has been successfully hit, but although this method is simple and cheap, there will still be some problems in the edge area of such targets."
To put it bluntly, the temperature gradient area around the ignition point must contain presets. The area where the targetable temperature difference zones overlap may be determined as a target at this time.
Gao Zhendong thought for a while and put forward his own suggestion: "You have two ways. One is to use rotation data to determine the positional relationship between these areas and the ignition point. If it is too close, don't fight. This In the simplest way, you only need to use a delay circuit to lock the firing circuit after scanning to the ignition point, or block the data holding circuit and not record the temperature difference data. The delay time is determined according to the rotation speed of the projectile. "
Lu Gong's eyes lit up: "Well, this is also a method you mentioned. Careful design can solve big problems at a small cost. "
To solve problems in engineering, sometimes it is not necessary to solve them completely, but only to reduce the probability of error events to an acceptable level. This is different from the idea of talking on paper.
Gao Zhendong smiled and said: "If you don't care about the cost, there is another way, and that is to use a two-color sensor."
The two-color sensor does not have to be UV/infrared dual-color, infrared in different bands can also be used It is two-color, and some bands of the infrared sensor are sensitive to flames. This principle can actually be used to determine the ignition point.
To put it simply, it uses the output of the flame-sensitive band to lock the action of the entire infrared sensor.
(End of this chapter)