The task of improving the educational process, improving the quality of education in the field of engineering and the effective use of technical methods and tools in the design and modernization of construction equipment using computer software is the most pressing modern task. The emphasis in education, which is transferred to the independent work of the student without changing the approaches and methods of teaching disciplines, and even more so specialized subjects, has a negative impact on the quality of the future specialist. Especially in such a difficult time, when you have to completely switch to distance learning, it is extremely necessary to change the approach to learning, especially in senior courses. The creation of complex complexes and machines is accompanied by a significant number of intermediate tasks. The use of the whole complex of construction equipment is mainly used in various technological operations and with the use of various replaceable work equipment. Modern pace of road construction dictates high requirements for modern technology, one of the important parameters of which is the utilization rate of the machine over time. When performing technological operations, the load from the ground is transmitted through the main working body to all elements of the suspension mechanism of the working equipment. The use of software allows you to preview any activity during the simulation allows you to check for security, reduce costs, and sometimes find new ways to implement, without conducting expensive tests. To do this, it is necessary to pre-model the node, unit, module, which will interact in a complex system. The use of modeling will assess the appearance of the finished product and its structural elements. At the moment, the development of objects of any kind cannot but be accompanied by the creation of a 3D model. This process will allow you to analyze the accuracy of all components that will interact when installed on a designed or existing machine.
Розглянута вдосконалена методика параметрів розрахунку маневреності колісного фронтального навантажувача на базі колісного трактора, у тому числі з бортовою системою повороту, та вплив навантажень, що виникають в процесі черпання, підйому та навантаження ковшем матеріалу, на втомну міцність стріли навантажувача для виявлення раціонального способу його виконання. Розроблена та проаналізована математична модель фронтального навантажувача в процесі черпання, підйому, навантаження щебеню та піску, в процесі руху та повороту по штучному покриттю та на ґрунті з пустим та наповненим ковшем при різних висотах підйому стріли (опущене, середнє положення, максимальний підйом). Проведена оцінка відповідності розрахункової моделі до умов роботи натурального навантаження. Проведений розрахунок моменту інерції, моменту опору, геометричних характеристик небезпечного перерізу стріли фронтального навантаження, визначено максимальний згинальний момент, максимальне напруження та допустиму межу витривалості.
Problem. The hydraulic drive of modern construction and road machines is quite complex, and it takes a lot of time and effort to model the entire drive in full. However, improving the quality of design with reducing terms and costs becomes possible only with the use of modern technologies, computer hardware and software. The existing models of hydraulic system working processes in the physical modeling environment SimHydraulics are presented by block diagram layouts from standard library elements (slide valve, hydraulic pump, hydraulic cylinder, safety and reverse valves, hydraulic locks, etc.). However, they do not consider the influence of time-varying external forces, which are a reaction during transient processes in multi-link mechanical systems. Goal. The aim of the work is to develop a simulation model of the fluid power drive of the excavator working equipment mechanical system in the MATLAB & SimHydraulics package for studying the dynamics of transient processes of multilink mechanical objects. Methodology. The article describes an example of developing a physical simulation model of the excavator working equipment fluid power drive in the SimHydraulics package. Using the real technical characteristics of the hydraulic equipment of the Borex 2201 excavator, the performance of the developed model was checked and the power characteristics of the actuators were determined. Originality. Using the blocks described in the article, a simulation model of the interaction of the excavator working equipment mechanical system with its fluid power drive can be created. Practical value. The model proposed makes it possible to obtain values characterizing transient processes, including changes in the value of the generalized coordinates of the characteristic points in the working equipment, the rate of their change, and the effort in the hydraulic cylinder. A visual representation of the manipulator movement can be obtained using the SimScape built-in visualization function. The resulting model allows solving problems of analysis and synthesis of excavator operation control systems.
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