The importance of accurate terminal velocities for hail impact testing procedures

Christian Dieling, Milton Smith, Mario Beruvides

Abstract

From an engineering and economic perspective, the terminal velocity of hailstones is an essential value for their kinetic energy and is influenced by numerous factors for those industrial engineers working in emergency management. It has to be carefully considered during laboratory hail impact testing. Hail impact testing can be required to comply with state, federal, and international standards. This paper looks at the various factors that influence the terminal velocity of hailstones and how they should be considered in testing procedures. Also explored are the implicit assumptions in many of these hail impact tests that the missile velocity, as measured at the chronograph, is the velocity at the point of impact. There is a significant decrease in missile velocity between chronograph and test specimen. An equation is presented that estimates the required velocity at the measuring position to produce the desired impact velocity as a function of the ice sphere diameter and the distance to the impact position. Improving the accurate measurement and determination of terminal velocity is critical for industrial engineers and technical managers involved in the growing area of industrial engineering concerning disaster management and engineering.

Original languageEnglish
Title of host publicationIISE Annual Conference and Expo 2021
EditorsA. Ghate, K. Krishnaiyer, K. Paynabar
PublisherInstitute of Industrial and Systems Engineers, IISE
Pages578-583
Number of pages6
ISBN (Electronic)9781713838470
StatePublished - 2021
EventIISE Annual Conference and Expo 2021 - Virtual, Online
Duration: May 22 2021May 25 2021

Publication series

NameIISE Annual Conference and Expo 2021

Conference

ConferenceIISE Annual Conference and Expo 2021
CityVirtual, Online
Period05/22/2105/25/21

Keywords

  • Disaster management
  • Hail impacts
  • Impact testing
  • Terminal velocity

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