Chapter 69 Supercomputer (45)
The reason why Chang Haonan dared to say such things as tearing it down and starting from scratch was naturally because he was 100% sure about improving the wing.
When he was just flipping through the design documents, he had already asked the system to start a new project.
[Based on the parametric modeling of the existing wing design, the differential evolution algorithm was used to conduct an integrated optimization design of the trailing edge flaps and leading edge slats to reduce the number of gaps and various components in the lift increase system. This airflow interference effect improves the lift-to-drag ratio at low speeds, especially at low speeds and large angles of attack]
Consumption of 15 points.
Being able to start the project in the system means that there is no problem with the idea
So after hearing Yang Fenghata’s question, he expressed his plan without hesitation:
"This requires the parametric modeling provided by the digital design group to come into play."
"I plan to post-process the results of the CFD flow field analysis to extract the required performance indicators as the entire optimization problem The objective function is used, and then the kriging method is used to select sample points to establish a surrogate model, and then the surrogate model is coupled with the differential evolution algorithm..."
The method mentioned by Chang Haonan is similar to what he had previously done in Beijing Airlines The principles of the model reduction method that I talked about when I met Yang Fenghata are basically the same, but the specific implementation methods are different.
Of course, this is not surprising. CFD flow field calculation is an ever-changing thing, and its principle is to solve the Reynolds average N-S equation.
The remaining various methods and models are all because the N-S equation does not have an analytical solution in most cases, so it is necessary to develop a numerical solution method with high accuracy and low computational cost.
Most people who are engineers may not have strong theoretical foundation. These things should be solved by mathematicians and physicists.
So looking at the derivation process that Chang Haonan densely wrote on the blackboard, most of the people in the conference room were confused.
But the final conclusion is understandable to everyone.
This algorithm written by Chang Haonan can greatly improve the convergence speed of the optimization algorithm, and the increase in independent variables has little impact on the amount of calculation.
That’s why he dared to optimize up to six independent variables at the same time!
At the same time, hearing Chang Haonan's answer, Yang Fenghao also recalled the amazing feeling he felt when he first saw this young man.
The other party is worth the risk.
So he stood up directly from his seat:
"That's it!"
"Xiao Chang, I'll apply for you to use the Sugon 1000 supercomputer. You should complete the algorithm and related programs in the past few days. If there are any tests needed As for the data, let the entire Eighty-three Project Project Team assist you."
After saying this, Yang Fenghao turned to another direction:
"Wing Structure Research Team, 伱. Our burden this time is also very heavy. The leading edge flap is a movable rudder surface, which requires certain modifications to the wing structure. After the overall design of Chang Haonan's slats is determined, the relevant pipelines must be completed as quickly as possible. and the layout of the hydraulic mechanism to ensure that after the improvements to the slats and flaps pass the test, manufacturing can begin as soon as possible!”
“The flight control project team must also pay attention to the work of Chang Haonan, We are designing a fighter jet, not a passenger aircraft, and we cannot allow the pilot to manually operate the slats, so you have to modify and adapt the flight control system to maximize the advantages of the new design!”
"In addition, since it has been determined to make design modifications to Units 04 and 05, we will simply not stop working on them and optimize other parts that were previously inconvenient to change, especially the intake duct professional team. You and Let’s discuss it together with the 606 Institute. There should be room for optimization in the matching of the inlet and the engine. Of course, the premise is that it does not affect the improvement of the wing.”
“The Ergonomics Design Team… ..."
"The overall design team..."
As an experienced designer, after confirming his determination, Yang Fenghao began to methodically report to the various design teams participating in the August 3rd Project. Give tasks.
Chang Haonan is undoubtedly the core role of the entire improvement plan.
His work currently has the highest priority and needs to be coordinated by other design groups. I have never experienced such treatment in my previous life.
After clarifying the work that each group is responsible for, Yang Fenghao slowly scanned the entire conference room:
"Have each group already understood their tasks? ? If you have any questions, ask them now!”
The way he stood in front of the conference table and deployed his work was indeed like a general.
This may be a sign of a relatively high level of [Management Ability].
“Clear!”
Almost everyone answered together.
Then, Yang Fenghao once again turned his attention to Chang Haonan beside the blackboard:
"Xiao Chang, during this time, I will send Yang Xia, the deputy director of the Secretariat Office, to assist you. The secretarial office of our office is also a confidential office, so her confidentiality level is very high. You can ask her to handle administrative matters. If you need to contact the office for confidential information, you can also contact her through her. ”
Obviously, this is already a very high level of attention.
"Mr. Yang and the comrades of the project team, please rest assured and ensure that the task is completed!"
Chang Haonan also quickly expressed his stance at this time.
Looking at him subconsciously standing at attention, Yang Fenghao's originally serious face also showed a slightly relaxed smile:
"Don't put too much pressure on me, just eight In terms of the requirements of the third project, the design of the leading edge slats is the icing on the cake. If you can detect in advance the problem of aileron reversal when the aircraft is loaded, it is already a huge contribution to this project.”
Although Yang Fenghao himself believed that Chang Haonan was capable enough to complete this change, as the project leader, he still had to provide sufficient support in terms of psychological construction.
This support varies from person to person.
Some people are poor at self-motivation, so some extra pressure must be applied to prevent them from working too hard.
Some people, on the other hand, are exactly the opposite. They often exert intensity on themselves and need to be given a relatively relaxed environment to maximize their effectiveness.
In Yang Fenghata's view, Chang Haonan obviously belongs to the latter.
"Don't worry, Mr. Yang, I have confidence in myself."
......
After the meeting, the entire August 3rd Project project team was like a sophisticated machine, surrounding the ideas proposed by Chang Haonan The wing improvement program was launched.
Yang Fenghata is very efficient. As the person in charge of the 83rd Project, he certainly has very high privileges in resource calling, so it only took him a few days to report to the National Intelligent Computer Research and Development The center jumped in line to apply for usage time of the Dawn 1000 supercomputer.
Chang Haonan himself used this time to write the user-defined functions (UDF) needed for the first stage of calculation in advance through fluent’s open user interface. When he got to the supercomputing side, as long as Compile the UDF and embed it into the shared library, and then execute it directly.
As for future work, we need to wait until the first stage of calculations is completed before the mechanism changes.
Everything is ready, all we need is the east wind.
(End of this chapter)