Abstract
Modern wheeled armoured vehicles can perform a variety of tasks, making the development of weapon systems that can be safely and effectively integrated with the vehicle structure an area of interest. Due to the cost of implementing new models, it is more economical to test potential configurations using numerical methods, such as the finite element method. The numerical model has been validated to confirm the reliability of the obtained results. Modal tests were also performed using four configurations to identify the frequency and mode shape of natural vibrations occurring within the support structure. In an experimental setting, hull vibrations were forced using the modal hammer testing method. The modal assurance criterion (MAC) and the authors’ procedure were used to confirm the experimental and numerical test results. Additional testing in the form of impact loads was carried out for turret-containing structures. Structural strain at indicated points and forces transmitted by brackets to the bottom of the hull were compared.
Highlights
The effectiveness of military-related tasks performed by multi-axle armoured vehicles depends on the acceptance of the expected operating conditions at the design stage
There is a high correspondence between the results, both in terms of the determined natural vibration frequency and form
As a result of modal analysis, the natural vibration frequencies and mode shapes of a roof hull plate of an armoured personnel carrier hull, a hull extended by two cantilevers of the roof hull plate, and by a bearing and a turret were determined
Summary
The effectiveness of military-related tasks performed by multi-axle armoured vehicles depends on the acceptance of the expected operating conditions at the design stage This generally translates to the establishment of appropriate tactical, technical, and design requirements. Limit values must be established for relevant parameters, describing characteristics such as firepower of the basic armament, ability to protect people and internal equipment, and the ability to drive in various road conditions These features are shaped based on the expected range of applications. An important structural node in this case is the connection of the roof hull plate and the turret system Armament systems for this vehicle class can generate loads in the full angular range in the horizontal plane and −10◦ to 60◦ in the vertical plane. Before deciding to change the purpose/equipment of an armoured vehicle, it is necessary to carry out appropriate testing
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