» Goodbye to bad vibes: A comparison of HTRI's tube vibration analysis tools (Part II)

This article compares Xist® and Xvib® methods for analyzing vibrations in heat exchangers containing U-tube bundles. Compared to straight tubes of equal span length, U-tubes are more prone to flow-induced vibration and its harmful effects. Theoretically, U-tubes can exhibit two modes of tube vibration: in-plane and out-of-plane. The in-plane mode distorts the radius of the bend locally, while the out-of-plane mode is the first bending mode for a cantilevered beam (shown in image below).

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Don't forget to check out our previous article, where we reviewed the differences between the Xist and Xvib vibration analysis methods for straight-tube heat exchanger configurations. A case study on this topic is also available.

» Discover what's next at our 2025 Global Conference

Join us in Denver, Colorado, USA from September 22 – 25 for an experience packed with insights, innovation, and lots of engaging discussions. Our Global Conference is your gateway to the latest advancements and real-world applications in heat exchanger technology.

Here's a sneak peek at some of the exciting topics we will explore:

what's new in Xchanger Suite®
experiments on electric heaters
seal strip performance in X-shells
breakthroughs in 3D printed heat exchanger
... and so much more!

Visit our conference website to explore the preliminary schedule, hotel accommodations, sponsorship opportunities, and more. We can’t wait to welcome you to Denver!

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The registration price will increase at 12:00 AM CDT on Saturday, August 30, 2025.
No registrations will be accepted after 11:59 PM on Monday, September 8, 2025.

Beyond the Basics: Engineering Checklists in Xchanger Suite Webinar

Date: July 16, 2025

Free to HTRI members

Session targeted for audience in Europe and Asia

Registration deadline: June 14, 2025

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HTRI Training – Global Headquarters

Date: October 21 – 23, 2025
Location: Navasota, TX, USA

* Early registration deadline: September 22, 2025

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HTRI Training – Southeast Asia

Date: November 3 – 5, 2025
Location: Kuala Lumpur, Malaysia

* Early registration deadline: September 24, 2025

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HTRI Training – Europe

Date: November 4 – 6, 2025
Location: Berlin, Germany

* Early registration deadline: September 24, 2025

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* To qualify for the 10% early registration discount, your registration and approved credit card payment must be received and processed by our system by 11:59 PM US Central Time on the early registration date.

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