Hydropneumatic suspension testing of a wheeled armoured personnel carrier

Abstract

The purpose of this study was to determine the effect of gas pressure and temperature on the spring characteristic of a HP strut used in a wheeled armoured personnel carrier. The research was performed based on a simulation model. Data to validate the model were obtained during experimental tests. The results indicate, among other things, that the friction generated in the seals is an important source of resistance force. Comparison of the simulation results with the measured characteristics indicates a proper modelling of the strut operation. Simulation studies have indicated that it is easy to modify the required suspension parameters by adjusting the initial gas pressure. A linear effect of pressure on static deflection can be assumed. Temperature has a strong influence on the spring characteristic. When it changes, significant changes in vehicle height are observed due to the lack of a compensation system. The temperature changes are not only due to changes in ambient temperature, but also by intense heating of the HP struts caused by the vehicle moving over rough terrain.

Dynamic loads on the roof plate of the wheeled carrier during the firing of a 30 mm cannon

“…99, No. 1, 2023 https://doi.org/10.14669/AM/162610 spring and damping components, as well as the influence of the technical and environmental conditions [11,12].…”

“…One possibility is to validate the individual assemblies that form part of the overall test object. An example of this approach for wheel carrier suspension components is presented in [12]. The most reliable method is to carry out a full-scale experimental study on a real object.…”

“…The strong influence of the vibration frequency of the gun's self-supporting structure on the firing accuracy was demonstrated, as well as optimisation possibilities for the dynamic structure properties. The accuracy of the fire is also strongly influenced by the quality of the weapon stabilisation systems, but also by the characteristics of the vehicle suspension, including its spring and damping components, as well as the influence of the technical and environmental conditions [11,12].…”