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Military Expenditures of the Most Influential Countries in the World During the Military Actions in Ukraine

Instability in the world makes it necessary to strengthen the military security of countries by modernizing armies, increasing armaments, using innovative technologies, which requires an increase in military expenditures. Such measures necessitate the restructuring of the economy, reformatting of business in various branches of economic activity. And this question becomes relevant not only in those countries that are involved in the war, but also in neighboring countries and countries that have an influence on the world economy and politics.

The influence of degree of loading and load placing on steerability of vehicles

The methodology of research of the influence of the degree of loading, kinematic parameters of movement, and nonlinear power characteristics of elastic elements and shock-absorbers of the suspension system on their steerability on curved sections of the road is developed. The research is based on the equation of kinetostatics of the system of sprung-unsprung part and differential equations that relate the motion of the sprung part of vehicles. Concerning the last, they take into account both loading of a vehicle and nonlinear-elastic characteristics of shock-absorbers.

Influence of transportation object position in car body on its vibrational loading

Dynamic model for research of object transportation location influence on its vibrating loading by moving through a number of single obstacles, road with random microprofile and rough road is offered. Differential equations and methods of their integration in MATLAB Simulink software product are presented. The values of frequencies and amplitudes of vertical oscillations, vibration acceleration of the transportation object at different locations in the vehicle body were obtained.

Identification of ways to further improve of highly effective interresonance oscillatory systems

The article substantiates the possibility of further improvement of highly effective interreonance oscillatory systems. To do this, it is proposed to apply a discrete-continuum oscillation system in which a third ultra-light mass is used as a body with distributed parameters (ultra-light weight).

Model i metod rozrakhunku poperechno-kutovykh kolyvan bitumo-shchebenevoho ahrehatu z rozihritym ridkym bitumom [Model and calculation method for transverse-angular oscillations of bitumen crushed stone aggregate with hot liquid bitumen]

Mathematical model of oscillations in the transverse and vertical space of trail of bitem and broken stone aggregate with independent torsions suspension with of motion warming up of bitems are developed.

Comparative analysis of the resonant vibro-impact two and three-mass structure systems with linear friction

The optimization model based on the criteria of energy efficiency of vibration systems is considered. This criterion is presented as the ratio of maximum of the working mass acceleration to consumption power of system. Optimization task is added of constraints that determine the technological aspects of vibrational resonant type - the width of the resonance zone, coefficient asymmetry of acceleration, maximum acceleration of the working mass. Searching of stiffness of asymmetric piecewise linear elastic properties at the basic of synthesis is entrusted.