The article discusses the development of innovative technology - an unmanned universal platform based on the Pelets snow and swamp-going vehicle, the key features of which are: the ability to quickly re-equip for various types of operations, the ability to perform work using remote control technologies, as well as high cross-country ability up to the crossing of water obstacles. The equipment is designed to perform a wide range of works: soil development, transportation and movement of goods, fire extinguishing, lifting and transport operations.
Keywords: versatility, snow and swamp vehicle, cross-country ability, remote control, quick conversion
ECE Regulation №66 allows to use computer simulation to determine the durability and passive safety of buses in the rollover conditions for approval. The most common method of computer simulation is currently the finite element method (FEM). Simulation of contact interaction using FEM has several assumptions that are shown in the article. Since the bus is contacted with the rotating platform during rollover, assumptions in contact interaction modeling can lead to errors in load conditions determining and, as a consequence, inaccurate values of the bus body deformations can be obtained. Therefore, authors developed a mathematical model of bus motion, which occurs before the impact with the ditch surface. To confirm the accuracy of the systems of differential equations, the comparison of the results of mathematical modeling, FEM simulation and experiment using separate bus section are provided in the article.
Keywords: mathematical model, finite element method, passive safety, bus body, deformations, rollover, ECE R66, planar motion, experiment, load conditions
The analysis of the shape memory alloys, and considered the possibility of using these alloys in the construction of cars. The method of calculating the spatial frame construction with elements made of these materials.
Keywords: alloy, shape memory, the body, the material safety, the elastic-plastic element
Experimental and theoretical study of the models of elastic-plastic elements vehicles manufactured from alloys with shape memory effect. Dynamic tests were carried out in the area of deformation (20-30%), which allowed to achieve optimum energy absorption and return to its original position for subsequent deformation. The model proved highly efficient in terms of the one-dimensional dynamic loading, such full-scale, and allow for the absorption from 55.8 to 97.8% of the inputs, depending on the initial geometrical proportions. Evaluation of the effect of the scale factor in the simulation of elastic-plastic elements on the basis of an alloy with shape memory effect showed the possibility of transferring the results of experimental studies on a real model of the car of the future.
Keywords: model, elastic-plastic element, alloy, shape memory effect, the dynamic test, the scale factor, the car of the future
The analysis of domestic innovative solutions describing shock devices. Topical area of research is to reduce the dimensions of such devices while maintaining their energopogloschatelnoy capacity and use of new materials such as shape memory alloys. A method for testing such devices with elements made from these materials.
Keywords: shockproof devices, dimensions, energopogloshchayushchaya ability, alloys, shape memory, the method of testing
The analysis of domestic innovative solutions describing shock devices. Topical area of research is to reduce the dimensions of such devices while maintaining their energopogloschatelnoy capacity and use of new materials such as shape memory alloys. The technique of testing such ustroustv with elements made of these materials.
Keywords: shockproof devices, dimensions, energopogloshchayushchaya ability, alloys, shape memory, the method of testing
The article proposes a method for determining the total impact energy and the deformation of the bus body in case of rollover. This method takes into account the deviation of the coordinates of the center of gravity. Developed adjusted formula for calculating the height of the fall of the center of gravity and total impact energy. Conducted experimental calculations based on which made suggestions for optimization of systems passive safety.
Keywords: bus, passive safety, center of gravity, total impact energy, body deformation, critical load
The article describes the design created for the study stand static, dynamic and resource characteristics of vibration isolators used for cushioning the tractor cab. The methods and results of studies of static and dynamic stiffness vibration isolators with rubber elastic element.
Keywords: tractor cab suspension, vibration insulator, static stiffness, dynamic stiffness test stand vibration isolators.
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