Testing At Transtex: Experimental Modal Analysis

Have you ever wondered why our brackets are positioned where they are along our aerodynamic skirts? Well, it wasn’t by random selection! Transtex engineers always go the extra mile to ensure that every inch of our product, brackets included, is tested rigorously for optimal stability on the road.

So let’s go back to our original question: why are brackets positions where they are along the skirt panel? Consider the purpose of the bracket; not only is it meant to attach the skirt to the trailer, it is also meant to stabilize the system under all road conditions. This allows it to withstand road vibrations, thus improving the endurance and life expectancy of the skirt.

Transtex tests the aerodynamic skirts using the Experimental Modal Analysis to determine the natural frequencies of the structure. This allows our engineers to detect the optimal bracket placement locations across the panel.

Experimental Modal Analysis is the study of the dynamic properties of an object under vibration. In other words, it is a non-destructive test method that studies how an object responds to a changing amplitude of vibrations. To conduct the Experimental Modal Analysis, an impact hammer with a force sensor at the tip is placed on one side of the skirt to create the necessary vibrations. An accelerometer is attached to the opposite side to measure the amplitude of the oscillations, i.e. the back and forth movement of the skirt. The impact hammer then moves, or “roves,” across the skirt panel following a predefined pattern that is based on computer analysis.

During a road test, Transtex measures the critical oscillation frequencies using the accelerometer. The roving hammer test determines the critical and natural oscillation frequencies of the skirt panel allowing our engineers to locate the optimal placement for the brackets, thus increasing the maximum road life span of the skirt panels.

The Winner Of The Transtex Draw Is Sylvain Gélinas!

Congratulations Sylvain Gélinas from Saputo on winning our draw at ExpoCam 2017! You will be receiving your free Transtex aerodynamic skirt set with the new Blue Bracket shortly. Attendees of the show left us their business cards for a draw to win a free Transtex aerodynamic skirt set. Thank you to all those who participated in the Transtex Draw to win a free set of trailer skirts.

ExpoCam 2017 Was A Success!

ExpoCam 2017 has come and gone, and Transtex is happy to have been a part of it. We enjoyed building new relationships, and catching up with valued partners. Our team had a wonderful time chatting with you. On behalf of Transtex, we would like to thank everyone that visited Booth #4909 at ExpoCam 2017, and we’ll be seeing you at Truck World next year!

Stay tuned to find out the winner of our draw!

Todd At Mack HQ!

Check out Todd P. McGuire, our Vice President of Sales, at Mack World Headquarters! Great picture with the Bulldog Todd!

ExpoCam Has Just Begun!

It’s the first day of ExpoCam at Place Bonaventure in Montreal, and we can’t wait to see you. Don’t forget to pass by Booth #4909. While you’re there take the time to speak with our Director of Sales, Jason Poupart, and participate in our draw to win a free skirt set! All you have to do is leave us your business card. See you soon!

Aerodynamics And You: Coast Down Testing

For the last two weeks we have been keeping you informed of the most popular methods of aerodynamic testing. Keep in mind that at high speeds, aerodynamic drag is to blame for approximately 25% of your truck’s fuel losses! Coast Down testing is another aerodynamic testing method used to measure aerodynamic drag. Read below to learn more!

Coast down testing is used to calculate the resistance caused by drag that a vehicle in motion encounters. Drag pushes the vehicle in the opposite direction of its motion, thus creating resistance. In order to combat such resistance, the vehicle’s engine must work harder. So, by reducing drag, a truck’s engine requires less power to push forward, which in turn requires less fuel. The test is conducted on a flat stretch of road while the vehicle is decelerating. Many factors must be taken into account before starting a coast down test. These include the mileage of the vehicle, ambient temperatures, wind, barometric pressure, and much more. Once the vehicle reaches a speed of almost 75mph, it is put to neutral and is allowed to coast until it stops.

Happy Easter!

From our family to yours, we wish you and your loved ones a Happy Easter filled with joy, happiness and peace.

Aerodynamics And You: Computational Fluid Dynamics (CFD)

Last week we mentioned the importance of aerodynamic solutions for your fleet. Recall that at high speeds, aerodynamic drag is to blame for approximately 25% of your truck’s fuel losses!

Computational Fluid Dynamics, or CFD, are another popular aerodynamic testing tool. CFD are mathematical computer simulations of the mechanical behavior of a fluid, in this case air, and how it flows around a vehicle. Testing involves a 3D model of the latter, and finite element simulation, or in other words simulation of how air flows around the 3D model. One important advantage of CFD is that is allows us to test a system without having to create a physical model. It can be used as a virtual lab. Furthermore, CFD is a powerful visualization tool. It creates a visual representation of air and how it flows, whereas air cannot be seen in the real world.  Once multiple simulations have been completed, the next step is to validate the results by attempting to replicate them in a real-world situation or in a wind tunnel. This method can be used during new product development in order to test and optimize a new concept.

Stay tuned for next week’s informational post on aerodynamic testing!