Shannon Wood, a graduate student in the mechanical engineering program at the University of Kentucky, has published a thesis entitled “Safety Concepts for Every Ride: A Statistical Ensemble Simulation to Mitigate Rotational Falls in Eventing Cross-Country.”
Wood was part of the team that worked with Dr. Suzanne Weaver Smith, University of Kentucky Professor of Mechanical Engineering, on the USEA Frangible Fence Study from 2016-2018. The study was funded by donations raised by the USEA Foundation and the initial findings were released in 2019. Information from this study is also included in Wood’s thesis.
Wood’s thesis abstract states, “Rotational falls are the leading cause of death and serious injury in the equestrian sport of eventing. Previous studies to develop safety devices used physical models representing one or at most several physical situations leading to different designs and no common understanding. In this thesis, a statistical ensemble model is developed and applied to generate and evaluate 10,000 different situations that might potentially lead to rotational falls. For accurate statistical representation of the horse and rider inertia distributions, measurements of over 400 training or competing horses and riders were recorded and incorporated. Video was recorded of 218 total competitors approaching 10 different jumps on cross-country courses in competitions ranging from Preliminary to CCI5*, yielding jump configuration angles for different fence types. Combining information for these, among 26 total variables, a statistical ensemble simulation using impulse momentum physics identifies conditions for rotation and defines design criteria for future general and situation-specific jumps and safety devices. A Jump Safety Quality Index is also devised to represent the benefit of an activating fence design for mitigating rotational falls versus the detriment and competition penalties of false activation.”
Wood also shared the following highlights:
“Results of this study include probability of rotation for a fixed fence scenario, the mitigative potential for preventing rotational falls, and contacts that cause a fence to activate but would not result in a rotational fall,” Wood said. “This information is incorporated into a Jump Safety Quality Index. It also includes force-time contact information for rotational and no-rotational fall contacts on the critical foreleg region. Illustrations of varieties of rotational falls are included—one-contact, two-contact (rotation on landing), and torsional falls and an additional contributor to rotation: hind feet pushing while in contact with the fence. Recommendations for impulse limit and contact angle are included to minimize unnecessary (false) activations.”
Wood’s thesis can be viewed in full here.
Read past updates on the USEA Frangible Fence Study:
The U.S. Equestrian Federation has announced the host location and dates for the 2024 and 2025 USEF Eventing Young Rider Championships (CCI1*, CCI2*-S, CCI3*-S). The Maryland International and Horse Trials will host the Championships in Adamstown, Maryland, on July 5-7, 2024, and July 6-8, 2025.
For the second year of the program, the United States Eventing Association (USEA) is proud to award free Digital Memberships to qualified participants of the Volunteer Incentive Program (VIP) that completed 10 or more hours of volunteer service through EventingVolunteers.com in 2023. The Digital Membership, which was introduced in January of last year, serves as a “thank you” to the loyal volunteers in our sport for their dedication to supporting events around the country throughout the year.
Spend the day immersing yourself in the intricacies of producing Young Event Horses at the 2024 Ocala Horse Properties USEA Young Event Horse (YEH) Symposium tomorrow, Feb. 20, in Ocala, Florida. A star-studded list of presenters and demonstrators will be on-hand to educate the audience on the proper training and evaluation of the next generation of 4- and 5-star horses. Click here to register!