In the room, after listening to Kardashian's question, Zhao Guoyang shook his finger with a smile.

"Running smoothly and running smoothly are two different things. Running stability refers to the comfort of walking, while running stability focuses on the safety of walking. ”

"The reason for the emergence of this parameter is mainly because of the lateral self-excited vibration problem that may occur when the train is running at high speed in a straight line. Often, we call this serpentine stability. ”

"This serpentine stability not only affects the stability of the train, but also may lead to derailment and endanger operational safety. Therefore, we must focus on the analysis of this critical speed of snakewalking......"

Listening to Zhao Guoyang's remarks, the two senior experts in the studio nodded in agreement.

"Mr. Zhao said great! This critical speed of serpentine travel is closely related to the derailment coefficient of the train, and in this regard, Durant and I are also preparing to talk to Kardashian and a few others!" Barosh said with emotion.

When Durant on the side heard this, he echoed in a loud voice: "Yes, yes, Mr. Zhao's arrival, Minister Baros and I will be much easier, and we can learn a lot...... Go on, and we'll hear you!"

Durant didn't say anything about it.

In fact, like Baroshe, he focused more on the design of the train.

It's not that he doesn't understand these theoretical studies, but there is no need to study them in detail.

After all, for a company as large as Bombardier Rail Vehicle Design and Manufacturing Group, the following division of labor must be very detailed.

This kind of theoretical analysis must be done by a special person.

After listening to Durant's invitation, Zhao Guoyang nodded with a smile and continued to tell some of the technical analysis he knew.

He touched his chin and said, "Unlike the general open railway trains, the passage of subway trains is more complicated. In this case, when we design the train, we should pay attention to the performance of this curve. ”

Hearing this, Kardashian raised her hand and said, "Mr. Zhao, I know this." Curve passing performance refers to the unfavorable static and dynamic force on the track and bogie when the train passes through the curved road. and the possibility of train derailment in the case of improper force on wheels and tracks. ”

When Zhao Guoyang heard this, he nodded approvingly and said, "Kardashian is right, this is the meaning of curve passing performance." Before we design, we need to calculate the curve through the performance parameters, about three parameters. It's the ultra-high outer rail, the unbalanced centrifugal force, and the curve speed limit......"

Zhao Guoyang's detailed narration directly convinced the three students.

After he talked eloquently, Kardashian showed an expression of amazement and said: "Mr. Zhao, Mr. Barosh really didn't praise it, your theoretical level is really convincing." ”

"Yes, that's what Kardashian said!" Farmar and Tristan also nodded their heads in succession.

Zhao Guoyang looked very calm, he smiled, opened a rough analysis table on the computer, and said with a smile: "In terms of design, there must be no problem with Mr. Barosh and Mr. Durant presiding." ”

"On my side, I'll probably tell Kardashian about the steps of train dynamics simulation analysis. When you are assisting the two teachers in the design, you can try to incorporate these dynamic simulation analysis. This is very helpful for you to improve your practical analytical skills. ”

After Zhao Guoyang finished saying this, Kardashian, Famal, and Tristan, you look at me, I look at you, all of them are surprised.

On the other side, Barosh and Durant were also overjoyed, so they almost moved a stool to sit down and be the melon eaters.

Zhao Guoyang "pulled" on the computer, called up a 3D model from the UG 3D program, and then began his own narration.

"If you want to do vehicle dynamics simulation analysis, you first have to build a mechanical model of the vehicle system, and its mathematical description, in 3D analysis, we call it 'modeling'!"

Listening to Zhao Guoyang's serious explanation, the three students were all stunned.

"After the modeling is complete, we need to provide the relevant system parameters. These parameters include the vehicle's geometry, mass, suspension parameters, and much more!"

"The geometric parameters include the wheel diameter, the wheelbase of the bogie, and the center distance of the bogie;"

When Zhao Guoyang said this, Farmar replied repeatedly: "Understood, Mr. Zhao." Geometric parameters are appearance data. So this quality parameter is obviously the quality of each part of the vehicle?"

Hearing this, Zhao Guoyang shook his head with a smile: "What you said is not comprehensive enough. In fact, the quality parameters include not only the quality of the parts, but also the quality and moment of inertia of the motor, car body, frame, gearbox, wheelset axle box and other components. These are not simply weights that can be expressed. ”

When Famar heard this, he couldn't help but blush.

Indeed, compared with the erudition of this Mr. Zhao, he was a little too self-conscious to speak just now.

Zhao Guoyang smiled and patted him on the shoulder for comfort, and then said: "As for the suspension parameters, this one is more complicated. It includes the positioning stiffness and suspension stiffness of the first and second series. In addition, the damping characteristic curves of the first and second series are also included. ”

Listening carefully to Zhao Guoyang's analysis, Tristan couldn't help but ask: "Mr. Zhao, in addition to these three system parameters, are there any other parameters that need to be analyzed?"

Zhao Guoyang said "um" and said affirmatively: "Of course, these other parameters also include the wheel, various geometric states of the track when they are in contact, the taper of the contact point, and the change curve and so on. ”

Hearing this, Kardashian couldn't help but sigh: "Mr. Zhao, there are many steps in this vehicle dynamics simulation analysis." Just a few of us, I'm afraid we can't handle it, right?"

Zhao Guoyang smiled and said: "This is natural! In fact, there is a special person doing the simulation analysis of vehicle dynamics on our side of Xingtai International." ”

"Of course, I know that you, Bombardier Rail Vehicle Design & Manufacturing, have the same research unit. However, the subway system in Songjiang City is not the same as your domestic railway system in Canada. It is obviously not appropriate to copy your simulations. ”

"So, this time I brought Mr. Barosh and Mr. Durant over, mainly to ask them to help design the shape of the train. As for the technical aspects of vehicle dynamics simulation, our people will do their best to help you get it done. ”

Although Zhao Guoyang's words were not very clear, the meaning was undoubtedly very clear, that is, Kardashian, Farmar, and Tristan were more like their own "New Research Institute of Automobiles and Motor Vehicles".

Although Kardashian has big breasts, she is not brainless, and after listening to the unfinished words of this Mr. Zhao, she nodded with a red face and said: "What Mr. Zhao said is! The specific situation still needs to be analyzed in detail." In this regard, the three of us must communicate with your company's technical personnel more and ask them for advice!"

Seeing that she was so knowledgeable, Zhao Guoyang nodded with satisfaction and said: "I can't talk about asking for advice, in short, let's learn from each other!"

Kardashian, Famar, and Tristan have already admired Zhao Guoyang to the extreme at this time, and they naturally obey his words.

After listening to Zhao Guoyang's suggestion, the three of them nodded again and again, saying that they must get along well with the technicians on the Huaxia side.

Seeing that his three students had changed their previous arrogance, Barosh could be regarded as letting go of the worries in his heart.

Turning his head to look at Zhao Guoyang, the technical minister was emotional.

Speaking of which, this Mr. Zhao and his three students seem to be about the same age, why are they so wicked?

Listening to what he just said, it was clear that he said it easily and without any preparation.

This kind of freewheeling play makes people's hearts palpitate even more!

Zhao Guoyang didn't know the emotion in Baros's heart, after giving Kardashian and the three of them a lesson, he shook hands with Barosh and Durant with a smile and said goodbye.

Looking at his back, Barosh and Durant glanced at each other, both full of emotion.

"Teacher, Mr. Durant, what is the origin of this Chairman Zhao? Looking at his age, it seems that he is only twenty-four or five years old, how can he know so much more than the three of us? Could it be that Huaxia went to school earlier than us? He already graduated with a doctorate at the age of twenty-four or five?" Kardashian asked unwillingly.

"It's not a Ph.D. graduate! According to me, this Chairman Zhao is only a bachelor's degree. Barosh shook his head.

"What? Just a bachelor's degree? How is this possible?" Farmar couldn't help but exclaim.

Barosh glanced at his disciple, shrugged his shoulders and said, "That's the case, but I don't know the specific situation. ”

"If the three of you want to have an in-depth understanding of the situation, you might as well have a good relationship with the technicians of 'Xingtai International', and maybe you can gain something......

After listening to the teacher's "support", Kardashian, Farmar, and Tristan all had bright eyes.

"What the teacher said is, then let's give full play to our affinity in the next period of time and see if we can let these researchers in Huaxia tell the story of Chairman Zhao!" Kardashian said confidently.

Famar glanced at her beautiful figure and turned to Tristan with a playful look.

Noticing the expressions of these two classmates, Kardashian pouted, "Hey, what kind of eyes are you two talking about?"

Hearing this, Tristan hurriedly waved his hand and said, "No, no, Kardashian, you misunderstood." The two of us think that if you go out alone, you will definitely be caught. Among those researchers in this Huaxia, they are all young and strong-blooded. With you, a big beauty, taking the initiative to talk, where can they still be reserved?"

"Yes, yes, Tristan is to the point! Our Kardashian charm, that's what everyone knows. I don't believe it, the researchers of this 'Xingtai International' can hold it!"

Kardashian didn't pay much attention to the two guys' teasing, she snorted, turned her head proudly, and continued to tinker with the data on the computer.

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