Methodology for Increasing the Efficiency of Dynamic Process Calculations in Elastic Elements of Complex Engineering Constructions

Abstract

This study deals with a methodology for increasing the efficiency of dynamic process calculations in elastic elements of complex engineering constructions. We studied the complex dynamic processes in a simple engineering construction, a mechanical system of an elastic body–continuous flow of homogeneous medium. The developed methodology is based on the use of a priori information on some of the vibrations forms, the construction of a “simplified” mathematical model of system dynamics, and the obtaining of an analytical relationship that describe the overall range of factors on the elastic vibrations of system. The methodology is used for cases of complex vibrations of elastic bodies, and the obtained results can serve as a basis for choosing the main technological and operational parameters of elastic elements of mechanisms and machines that perform complex vibrations. The results obtained in this work are the basis for calculating the blast effect on the elements of protective structures in order to increase their protective capacity by improving the method of their attachment or by using additional reinforcement, buff load effects on the elements of drilling strings and dynamic processes that occur during surface strengthening by work hardening in order to avoid resonance phenomena, and technological processes of vibration displacement or vibration separation of granular media.

Influence of Impulse Moments On Single-Frequency Torsional Oscillations of Nonlinearly Elastic Bodies

“…The results obtained in this work can be the basis for the choice of operating parameters of machine elements of mechanisms that are exposed to instantaneous moments to avoid resonant phenomena, in particular, rotors of multistage compressors of gas turbine engines [18]; research of dynamic processes in machines with flexible high-speed rotors to justify the choice of the most stable frequency of its rotation.…”

“…), we know from the literature [18,19,20]. The question of the flow and the conditions of existence of a single-frequency process, depending on the initial conditions of the system, can be the subject of separate studies.…”

“…U a x is 2periodic by argument k  and is not contained in the schedule of the first harmonic k  , its derivatives have the same property. Therefore, by substituting the correlations (18) and ( 19) into the differential equation (16), at the same time using the properties of the system of functions…”

Modeling Renewable Energy Systems by a Self-Evolving Nonlinear Consequent Part Recurrent Type-2 Fuzzy System for Power Prediction

“…One may suggest system identification as a solution to cope with this problematic issue. This method puts the mathematical equations at the access point, utilizing input-to-output data analysis to increase the efficiency of dynamic process calculations [2]. Computational intelligence lies among the most efficient methods with excellent fulfillment.…”

Modeling of Renewable Energy Systems by a Self-Evolving Nonlinear Consequent Part Recurrent Type-2 Fuzzy System (NCPRT2FS) for Power Prediction

“…One may suggest system identification as a solution to cope with this problematic issue. This method puts the mathematical equations at the access utilizing input-to-output data analysis for increasing the efficiency of dynamic process calculations [2]. Computational intelligence lies among the efficient methods with an excellent fulfillment.…”