DYNAMICS OF COMBAT MODULES OF LIGHTLY ARMORED VEHICLES: SIMULATION OF TRANSIENT AND STEADY PROCESSES

The work describes a general approach to dynamic processes modeling under action of pulsed reactive forces of recoil during firing shots from combat modules weapons. The combat module can be presented as a discrete system; this approach also applies to elements of drive, engine, transmission, etc. They are characterized by a local compact concentration of mass and high rigidity of the structure itself compared to the same armored hull or special elastic elements of suspension system. Then the reaction of this complex mechanical system to the action of dynamic forces is of interest. On the basis of the developed approach to analysis of the dynamic response of the combat module of a lightly armored vehicle equipped with a small-caliber automatic gun to the action of reactive recoil forces, it is proposed to carry out a qualitative analysis on simplified models at the first stage. The influence of a single shot and burst firing on the deviation of the axis of the barrel from the direction to the target is analyzed. For this, a simplified test model was built. Further, on the obtained simplified models, the results are compared with the results of the analysis on more complex models. The introduced piecewise linear approximation dependence of the time distribution of the reactive recoil force makes it possible to parametrize such force distribution with one parameter. As evidenced by the research results, the nature of the response of the studied dynamic system is strongly influenced by the damping level. If the damping level is high, and the frequency of the pulses is not a multiple of the natural oscillations frequency then the influence of individual pulses can be considered in isolation from each other. The characteristic features of the transient and stable modes of movement of lightly armored vehicles combat modules are determined. These qualitative features determine the nature of the response of the dynamic system to the action of a single pulse and to the action of a series of such pulses. The same features are also characteristic of systems with a large number of degrees of freedom, as well as systems with distributed parameters.
Keywords: dynamic system, combat module, lightly armored vehicle, transition process, steady process, integration of differential equations system, reactive recoil forces during firing shots