Baseball bat vibration. 2023 EASTON ADV 360 USA BASEBALL BAT, 2022-10-27
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Baseball bat vibration is a phenomenon that occurs when a ball is hit with a bat. When a ball is struck with a bat, the energy of the impact is transferred from the ball to the bat. This energy causes the bat to vibrate, and the frequency and intensity of this vibration can vary depending on the properties of the bat and the ball, as well as the speed and angle at which the ball is struck.
One of the primary factors that affects the vibration of a baseball bat is the material it is made of. Bats can be made from a variety of materials, including wood, metal, and composite materials. Each of these materials has its own unique properties that can affect the way the bat vibrates when it is struck.
Wood bats, for example, are known for their tendency to vibrate more than metal or composite bats. This is because wood is a relatively soft and flexible material, so it absorbs more of the energy of the impact. As a result, wood bats tend to have a lower "trampoline effect," which is the measure of how much energy is transferred back to the ball when it is hit.
On the other hand, metal and composite bats are known for their ability to transfer more energy back to the ball when it is hit. This is because these materials are harder and less flexible than wood, so they absorb less of the energy of the impact. As a result, metal and composite bats tend to have a higher trampoline effect and can produce harder-hit balls.
Another factor that can affect the vibration of a baseball bat is the speed and angle at which the ball is struck. A ball that is struck with a high speed and a steep angle is more likely to cause the bat to vibrate more than a ball that is struck with a lower speed and a more shallow angle. This is because the higher speed and steeper angle of the ball increase the amount of energy that is transferred to the bat during the impact.
In conclusion, baseball bat vibration is a natural phenomenon that occurs when a ball is struck with a bat. The material of the bat, as well as the speed and angle at which the ball is struck, can all affect the way the bat vibrates. Understanding these factors can help players choose the right bat for their needs and improve their performance on the field.
Why Do Bats Sting for Bad Hits?/
A Brief Survey of Various Attempts at Reducing Vibration in Baseball Bats Several bat manufacturers have tried a variety of vibration absorbers in an attempt to minimize the vibration in the handle that produces the painful sensation of sting for hits away from the sweet spot. The reason behind it is that as you swing, you generate a lot of kinetic energy. My recommendations were implemented in the first generation of bats sold by Albin Athletics. This mode is an extremely inefficient octupole type of sound radiator and will not be very audible even if exited by a hit off the sweet spot. Now the first bending mode B1 is absent from the FRF because this mode shape has a node zero displacement point at this location so an impact here will not excite it.
Then I took the bats to my research lab to carry out a more detailed vibration test to measure the vibration properties of the three bats. Why Does the Softball Bat Rattle or Vibrate? With this type of hit, the ball will not fly as far, and the energy transfer will not be efficient. To stop the vibration of the bat when you swing, make sure you swing perfectly. Russell, " Proceedings of Inter-Noise 2012, August 19-22, 2012. The region on the barrel end of the bat, between the nodes for the first two bending modes, is the "sweet zone" of the bat, and impacts within this region approximately 5-7 inches from the end of the barrel will result in a minimum amount of vibration in the handle.
But after consulting baseball players, Russell learned that the most painful sensations occur in the top hand, where vibration frequencies between 600 and 700 Hz reside. This bat is loaded with amazing tech. However, with some experience comparing FRF data for a couple of different impact locations one can quickly identify the frequencies for the different types of vibrational patterns a bat exhibits. The current version of the damper see photo at left still has a metal mass piece surrounded by a rubber spring, but fits into a much smaller plastic knob. This can easily be demonstrated by holding the bat lightly in one hand at the handle and tapping the barrel on the ground. Think of it as negative reinforcement.
The residual kinetic energy pent up in the bat when you 3. What I found in the lab was that the preferred bat C had about 6 times more damping for the first bending mode, compared to bats B, but the damping for the second bending mode was 30 times greater for bat C than it was for bat B. If you play in a USA league, get your Easton ADV 360 baseball bat today and level up your offense now! You can also wrap the handle of your bat with leather or padding to reduce some of the vibrations that you feel. In order to keep the total bat weight similar to other bat models for example, a minus-3 drop bat would weigh 31-oz for a 34-inch length weight must be removed from the barrel end of the bat. Why Do Bats Sting for Bad Hits? This animation of the mode shapes, combined with the high speed video showing the top hand being violently thrown away from the handle for bad hits, suggests to me that the second bending mode - even with the higher frequency - is the more likely cause of sting. Do Composite Softball Bats Vibrate or Rattle? You simply need to practice more and make your swings more consistent, hitting the ball with the sweet spot every hit.
The three videos show two players swinging the same bat at a ball pitched from a pitching machine. When a softball bat nears the end of its lifespan, it can start to rattle or vibrate even when you hit the ball with its sweet spot. I have seen college players and adults shaking out their hands after dropping the bat, and I've heard from young kids who want to quit playing baseball because of the pain they experience when the ball is not hit squarely on the sweet spot of the bat. But it can become a learning tool for you. The result is a mass-spring device nestled in the baseball bat's knob that quickly eliminates the bending pattern, or vibration, responsible for the bat's more painful sting. I am not saying you need to make every swing count. From left to right, the video clips show an impact at the sweet spot, an impact outside the sweet spot toward the barrel end of the bat , and an impact inside the sweet spot toward the handle.
Why Does My Softball Bat Vibrate? [Reasons And Solutions]
While the four bending modes are present in the FRF, the two hoop modes H1 and H2 are missing. Each peak in the FRF represents one of the vibrational modes of the bat - the first four bending and first two hoop modes are identified. But Daniel Russell, a professor in the graduate program in acoustics at Pennsylvania State University in University Park, has figured out that bat vibrations between 600 and 700 hertz Hz cause the most pain and that specifically tuned vibration absorbers are the best at combatting the sting. I don't know why this damping technique wasn't applied to another model bat which satisfied the new NCAA rules, but it seems that Worth abonded this approach after its initial introduction in 1998. But not all bats come with a vibration-eliminating feature. How Do You Stop a Softball Bat from Vibrating or Rattling? RIGHT close-up photo of the vibration absorber. The most effective methods for reducing sting target the second bending mode.
The absorber weighs a couple of ounces to the total weight of the bat. Only the ones that come with special padding or those designed to be worn during winter offer good protection against stinging. Besides, if you are using an aluminum alloy softball bat, even a high-end one, it will sting your hand. But the balls that you do manage to hit, make sure The sting you get from a poor connection of the bat does not feel that pleasant. The left plot shows the FRF recorded for an impact near the barrel end with the accelerometer about 9 inches in on the barrel. As a result, you'll always get a solid feel at contact. These absorbers must be specifically tuned, since the painful vibration frequencies vary depending on a bat's length.
After listening to each bat, I called the manufacturer and told them that I thought bat C was the bat that all of the players preferred and that the reason had to do with the amount of damping for the second bending mode. This hit will send a lot of vibration throughout the bat causing your hand to sting if you try to hold on to the bat after the shot. So, which bending mode is more important: the first or the second bending mode? Let me give you a thorough rundown of why a softball bat vibrates and what you can do to reduce it. This circuit-absorber converts vibrational energy in the handle into electrical energy which is then dissipated through resistors; a red LED in the knob lights up with the bat vibrates and the energy is being dissipated. Essentially, Albin redesigned a larger knob for the handle of a metal baseball bat to fit the Matthews Harmonic Damper TM a mass-spring vibration absorber designed to reduce vibration in compound hunting bows. The reduction of weight in the barrel end and increase in weight in the knob of the handle means that the balance point of the bat shifts toward the handle, and the Assessing the Performance of Vibration Reduction Damping Mechanisms This section still needs to be written How is damping measured? The frequency response from the accelerometer is divided by the frequency response of hammer impact resulting in what is called the Frequency Response Function FRF for the impact. In December of 2006, I managed to find a used 33-inch, 29oz Worth Copperhead ACX on eBay took it to my lab for testing.
For most single walled aluminum bats this mode has a frequency around 2000Hz; for most double walled aluminum bats it is around 1500Hz; and for some recent composite bats it is as low as 1000Hz. What you need to know is that if you do not hit the ball with the sweet spot of the bat, it will vibrate and rattle uncontrollably. A piezo-electric material is a special ceramic that when squeezed, produces a voltage proportional to how much it is squeezed. The vibration is quite intense, and some hitters even have to drop the bat as it becomes extremely difficult to hold on to it. Most aluminum bats are susceptible to vibrating to some extent.
