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Possibilities of vacuum packed particles application in blast mitigation seats in military armored vehicles

Dominik Rodak Mateusz Żurawski Michał Gmitrzuk Lech Starczewski
Bulletin of the Polish Academy of Sciences Technical Sciences | 2022 | 70 | 1 | e138238 | DOI: 10.24425/bpasts.2021.138238
Keywords blast mitigation seat STANAG 4569 drop-test vacuum packed particles
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Abstract

Blast mitigation continues to be a popular field of research when military vehicles are concerned. The main problem is coping with the vehicle global motion consequences following an explosion. The paper presents a potential application of the linear vacuum packed particle (VPP) damper as a supplementation for a viscous shock absorber in a traditional blast mitigation seat design. The paper also presents field test results for the underbelly blast explosion, comparing them to the laboratory tests carried out on the impact bench. To collect accelerations, the anthropomorphic test device, i.e. the Hybrid III dummy, was used. A set of numerical simulations of the modified blast mitigation seat with the additional VPP linear damper were revealed. The VPP damper was modeled according to the Johnson–Cook model of viscoplasticity. The Hertzian contact theory was adopted to model the contact between the vehicle and the ground. The reduction of the dynamic response index (DRI) in the case of the VPP damper application was also proved.
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Authors and Affiliations

Dominik Rodak
1
ORCID: ORCID
Mateusz Żurawski
1
ORCID: ORCID
Michał Gmitrzuk
2
ORCID: ORCID
Lech Starczewski
2
  1. Faculty of Automotive and Construction Machinery Engineering, Warsaw University of Technology, Poland
  2. Military Institute of Armoured and Automotive Technology, Poland

Preliminary research of a symmetrical controllable granular damper prototype

Anna Mackojc Bogumil Chilinski Robert Zalewski
Bulletin of the Polish Academy of Sciences Technical Sciences | 2022 | 70 | 3 | e141002 | DOI: 10.24425/bpasts.2022.141002
Keywords granular materials Vacuum Packed Particles Bouc-Wen model hysteresis loop experimental results model identification
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Abstract

This paper concerns the problem of empirical investigation and mathematical modelling of a novel controllable damper using vacuum packed particles. Vacuum packed particles tend to be placed among the group of so-called ‘smart structures’. The macroscopic mechanical features of such structures can be controlled by the partial vacuum parameter. The authors consider an application of Bouc-Wen model in order to represent the dynamic behaviour of the investigated device. The verification of the model response with experimental data is discussed. The Bouc-Wen model parameters identification is described.
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Authors and Affiliations

Anna Mackojc
1
ORCID: ORCID
Bogumil Chilinski
1
ORCID: ORCID
Robert Zalewski
1
ORCID: ORCID
  1. Institute of Machine Design Fundamentals, Warsaw University of Technology, Poland

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