Crew Seating Blast Effects Simulator

Lansmont delivered yet another in a series of one-of-a-kind high-performance shock machines to the Army’s Research Laboratory (ARL)VITS_320 in Adelphi, Maryland just outside of Washington, D.C. Designated the VITS (Vertical Impact Test System) by Lansmont or Crew Seating Blast Effects Simulator (CSBES) by ARL, this system expands the work already being performed on a more traditional vertical “free-fall” shock machine (a Lansmont Model P65/81L TTS) and 91 HITS (Horizontal Impact Test System) to replicate and study the effects of explosive shocks experienced by soldiers inside combat vehicles.

According to the Congressional Research Service in a report for Congress, “Improvised explosive devices, also known as IEDs, roadside bombs, and suicide car bombs, have caused 60% of all American combat casualties in Iraq and 50% of combat casualties in Afghanistan…” As such, it has been among the Army’s highest priorities to attenuate these impacts with better, intelligently designed seating systems and these efforts are paying off in saved lives and reduced injuries.

Like the 91 HITS, the VITS is unique in the shock simulation world with its stationary (no pre-acceleration) table being impacted by a 1200 pound aluminum “bullet” fired by a pneumatic piston with enough energy to drive the table with a 650 anthropomorphic “dummy” and cab up to 7 meters per second. In addition, the VITS replicates an initial impact to the feet of the “dummy” simulating floor deformation and an ensuing “after shock” coming from the vehicle’s landing, known as “slam down”.

This violent sequence is all controlled using Lansmont’s TTSII (TouchTest Shock II) controls to produce repeatable and reliable results that ARL engineers are using to evaluate and improve different seating systems based on their effects on our soldiers. Lansmont is extremely proud to be playing a part in this demanding research.

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