It was this emotion of arrogance and prejudice that caused the gladiator to ignore Jin Zhan's surprisingly flexible body and the more than 10 oscillating attacks coming from his helmet.

Although the oscillations in the back get weaker and weaker, until they are almost imperceptible. But as a battle-hardened gladiator, one should never fail to carefully analyze one's opponents.

It turned out that at the beginning of the battle, the gladiators on the opposite side had a habitual action of tapping the helmet to boost morale, and Jin Zhan caught the vibration of the metal helmet in an instant due to the high concentration of his perception.

In both eyes, you can even see pictures of the slight displacement of the armor frame by frame. Fang Cai Jin Zhan took advantage of the gladiator's all-out attack to lose control of his body at the moment after he lost it, and used his unique unspaced high-frequency attack method to swing more than a dozen knives in a row and hit the same place in the metal steel helmet.

He controlled more than a dozen swords to hit the same place with varying forces and amplitudes, trying to induce amplification of the amplitude and energy of their oscillations. Unexpectedly, as the attack speed increases, the amplitude and energy of the oscillation gradually decay.

This made Jin Zhan immediately realize that the frequency of his attacks was too high, and there was a big difference from the natural vibrational frequency of the helmet and the gladiator's brain and body composition system.

It had only been half an hour of hard thinking and meditating, but at the last moment, he suddenly found that the heavy metal helmet that had distressed him had become a key point for him to turn the tables.

The metal helmet and the gladiator's brain and body form a single-degree-of-freedom mechanical vibration system, with the only damping coming from his head and body.

Therefore, Jin Zhan tried his best to measure the natural frequency of this system, and attacked with this natural frequency, constantly inducing its oscillation to intensify, amplitude divergence, and vibrational energy expansion.

At the same time as he launched the attack just now, Jin Zhan's perception had firmly remembered the results of this experiment. At the same time, he constantly calculates and corrects the equation of motion formed by the force, damping force, elastic force, and inertial force of each blow in his brain.

At the same time, according to his powerful brain, the instantaneous amplitude displacement of the helmet captured in frame by frame was fitted into a time history curve of amplitude displacement.

In turn, the frequency response characteristics of the vibration can be clearly observed in the frequency domain by performing the Fourier transform on the modified amplitude displacement time history curve.

This calculation process can be completed in just one round of staggered time between two people's bodies.

The gladiator's anger continued to rise due to the failure of the strike, and he habitually patted the helmet on his head again, and looked at Jin Zhan sarcastically, meaning that you will continue to hit me on the head.

He took another step forward to launch a more aggressive attack on Jin Zhan, this time changing the slash to a wider range of slashes in order to make sure he took him down this round. And Jin Zhan's previous ineffective attack made him completely give up any defense, and he didn't care about presenting all the flaws around his body to his opponent.

What Jin Zhan is looking for is the opponent's powerful attack method that leaves no way back. In this way, once he dodges, he will have room for flexible operation, and if the other party is approaching steadily and steadily in a small space, he really can't dodge them one by one, but for this kind of broken attack, Jin Zhan is still very sure.

In the face of the strong wind, although Jin Zhan seemed to be stunned, his countless orders had already been given. And the body finally began to respond slowly, and continued to accelerate downwards to dodge.

Originally, in the eyes of the gladiator on the opposite side, his speed of leaning down to dodge was too slow, and his sword qi was enough to cut off his head. Unexpectedly, his body style was really weird, and his movements were extremely slow at first, but then he was getting faster and faster. It is completely inconsistent with the laws of normal people's actions, and he still dodges his own horizontal attack.

Ignoring the frenzied sword qi above his head, Jin Zhan leaned over to dodge the attack and folded up almost instantly, reflexively approaching the gladiator who had lost his position.

Again with a short knife in the same place of the metal helmet, a series of blows were completed with different forces and frequencies. Of course, the attack data was once again used by Jin Zhan to refine the vibrational modal equations of motion.

The results show that the natural frequency of the helmet vibration system is in the low frequency band that is difficult for the human ear to hear.

The loss of the gladiator's two heavy blows made his strong body feel a little strained, after all, all the kinetic energy needs to be absorbed by his own muscles and connective tissue. But the magical dodge method on the other side dodged his inevitable attack twice in a row, which was not accidental in his opinion.

Based on years of combat experience, he routinely analyzes his opponents. Tall and thin figure, the whole body does not look like a little muscle.

When fighting, he chose not to wear any armor and only carried a short knife as a weapon to attack, presumably to keep the weight of the body as light as possible, and to maximize the advantages of agility and agility.

It seems that the other side is really not a complete idiot, but why did he commit such senseless attacks twice in a row?

The gladiator began to change his attacks, and the unpretentious attacks began to replace the unpretentious attacks that were broken and quick wins.

Jin Zhan in this situation had no choice but to dodge left and right to cope with it, and he was already in danger in a short period of time, how could he have a chance to attack again?

Seeing that Jin Zhan was forced to retreat in a corner, the gladiator noticed that the short knife that his opponent was carrying flew towards his eyes impartially.

He hurriedly subconsciously withdrew all his attacks and used his giant sword to block the flying knife. But when he blocked, he found that the flying knife was simply weak and weak, and it was knocked away by a blow, so how much actual threat did it have.

This block action was purely due to the instinctive reaction of the vulnerable part of the eye after being threatened, and in the process of the attack just now, he had already determined that Jin Zhan was just the end of the crossbow. It was only a matter of time before it was resolved, so I didn't care about these details.

But for Jin Zhan, this opportunity was his only chance to escape death!

Because the opponent protected his eyes, he also blocked his vision. This time window Jin Zhan had calculated extremely clearly, and at the same time as throwing the flying knife, he started to break forward with all his strength.

While the gladiator was shielding his eyes with his metal heavy sword, Jin Zhan had already come to his side. Although Jin Zhan's body is thin and weak, his height and arm span are actually relatively good. Without the dagger, he struck his opponent's metal helmet with only the palm of his flesh.

The structure of the human body is very complex, and the bone structure, organs, muscles, tissues, and skin constitute a non-continuous nonlinear medium. As a result, external vibrations can have varying degrees of variable effects on the human body.

Among the mechanical vibrations, the impact of low-frequency vibrations on the human body is particularly prominent. For example, motion sickness and seasickness are typical low-frequency mechanical vibrations, which will not directly threaten the life safety of the human body, but will cause unpleasant feelings that are difficult to ignore in a short period of time. In severe cases, it can even interfere with local blood circulation and the normal progress of nerve reflexes.

And when Jin Zhan figured out the natural frequency of the vibration system of the metal helmet, he actually wanted to put aside the short knife in his hand for a long time. Because the frequency of the vibration caused by the back of the knife hitting the metal helmet was too high, he needed that kind of low-frequency vibration, so slapping with the palm of his hand was obviously the best way.

In this palm, Jin Zhan used all his strength, and in a short period of time, palm after palm continued to slap on the metal helmet, and every bit of power was just right.

Jin Zhan's palm, as the source of external vibration excitation, always attacks at a natural frequency close to that of the metal helmet system, and after the metal helmet system is excited close to the natural frequency, the amplitude of each forced vibration is continuously superimposed linearly, and the energy is increased by a square multiple.

Just as the gladiator was parrying, he saw Jin Zhan dodge to his side, this time trying to attack his helmet with his flesh, which made him scorn in his heart, and he didn't even want to pay attention to it. But he didn't expect that this time the other party was just slapped with his palm, but it caused him an indescribable discomfort.

In the past, in his martial arts career, only when the opponent hit his helmet with a heavy weapon such as a war hammer, it would make him feel dizzy, but I don't know why the thin man in front of him slapped his metal helmet with a mediocre palm, why did his brain produce a strong feeling of dizziness? And this dizziness was like a wave, wave after wave, and in a short period of time, this dizziness swallowed up his entire mental consciousness.

After a whirlwind, the whole person was also shaky and about to lose control of his body. He felt like a boat in the middle of the ocean, constantly battling the storm and the stormy waves, trying his best to stabilize his body.

But in the distance, a vague figure was stomping on the ground with its feet. As he stomped his feet, it seemed that the shaking of his head became more and more intense, until the whole person sat on the ground with blurred vision and limp.

It turned out that Jin Zhan did not stop after the first blow, and continued to hit the ground with both feet, causing low-frequency vibrations to be used as an excitation source again, constantly inducing the resonance of the gladiator helmet system. Until the other party foams at the mouth and is powerless to collapse.