On the basis of machines with an articulated frame it is possible to create a complex of machines for road construction, repair and maintenance. Therefore, a number of comprehensive studies are needed to increase their reliability and durability. This is especially true of the main joints of the articulated joint and the hydraulic steering, which ensure the rotation of the frame parts around the vertical hinge. The research was performed in two stages. At the first stage the mathematical model of dynamic interaction of the working equipment of the car with the developed environment was created and investigated. In the second stage, a machine experiment was performed to determine the loads on the bearing system. The mathematical model is based on the physical model of the loader, which consists of three elements: two hinged parts of the frame, one installed energy module, the other ‒ the technological module and the connecting and control module. The Lagrange equation of the second kind served as a basis for modeling the dynamics of the equivalent calculated dynamic model. The solution of the complex system of differential equations allowed to obtain all the required values, which have a significant impact on the formation of the load of the coupling-control device. According to the results of mathematical modeling, the ranking of factors that affect the load of the hydraulic drive of the coupling and control device. The machine experiment allowed to determine the load on the load-bearing system and to study the effect of the impact loads from the working equipment on the hinged connection of the frame parts. As the analysis of the mathematical model showed, the place of application of force to the bucket, the angle of assembly of the frame parts and the initial speed of the loader have a significant effect on the load of the hydraulic drive. The load of the hydraulic cylinders is determined by the place of application of force to the bucket. The change in the circular torque of the coupling and control module, taking into account the characteristics of the material being developed and the stiffness of the tires, must be taken into account when calculating the frame of the articulated machine and the hydraulic drive.

loader, articulated frame, hydraulic drive, steering, dredging, research, mathematical modeling

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1. Popov, N.S., Balovnev, V.I.(1994). Razvitiye dorozhno-stroitel'nogo mashinostroyeniya na konvertiruyemykh predpriyatiyakh [Development of road-building machine-building at convertible enterprises]. Stroitel'nyye i dorozhnyye mashiny – Building and road machines. 10, 2‒8 [in Russian].

2. Popov, N.S., Balovnev, V.I.(1996). Perspektivnyye otechestvennyye dorozhno-stroitel'nyye mashiny i kompleksy [Promising domestic road-building machines and complexes]. Stroitel'nyye i dorozhnyye mashiny – Building and road machines. 6, 2‒6 [in Russian].

3. Kukhtov, V.G., Shcherbak, O.V.(1997). Modul'noye formirovaniye stroitel'no-dorozhnykh mashin [Modular formation of road construction machines]. Trudy pervoy gorodskoy konferentsii «Aktualʹni problemy suchasnoyi nauky u doslidzhennyakh molodykh vchenykh m. Kharkova» ‒ Proceedings of the first city conference "Actual problems of modern science in the research of young scientists in Kharkiv". 50-52 [in Russian].

4. Kirichenko, I.G.(2002). Modul'naya kontseptsiya proyektirovaniya tekhnologicheskikh mashin dlya stroitel'nogo proizvodstva [Modular concept for the design of technological machines for the construction industry]. Kharkiv: Izdatel'stvo KHNADU [in Russian].

5. Shcherbak, O.V.(2000). Razrabotka ratsional'nykh parametrov soyedinitel'no-upravlyayushchego modulya frontal'nogo pogruzchika [Development of rational parameters of the front loader connecting and control module]: Candidate's thesis. Kharkiv [in Russian].

6. Ivanenko, O.I., Shcherbak, O.V.(2019). Doslidzhennya vplyvu navantazhenosti na konstruktyvni elementy sharnirnykh mashyn dlya dorozhnʹoho budivnytstva. (Chastyna 1. Teoretychni doslidzhennya) [Investigation of the influence of load on the structural elements of articulated machines for road construction. (Part 1. Theoretical research)]. Naukovi visti Dalivsʹkoho universytetu (Elektronne vydannya). ‒ Scientific news of Daliv University (Electronic edition). 16 [in Ukrainian].

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