Advantages Of FEM Research Articles

Dynamic behaviour of a battery pack for agricultural applications

Fight and contrast against climate change and global warming can be considered the most important challenge for the next decades. One of the most involved sectors is the one related to the carriage of passengers and goods, and, recently, also the work vehicles too. The agricultural machines and tractors are no exception to this. Indeed, agricultural industry is the second contributor in terms of pollutant emissions. So, research about agricultural machinery is focusing itself about the development of more sustainable propulsion systems such as hybrid or full-electric solutions. One of the most important components of a hybrid or full electric vehicle is the battery pack. The lack of adequate vibration isolation is the main cause of battery pack failure during operation. In the field of the agricultural vehicles, since the maximum speed is quite low and the weight of the various subsystems are high, combined with heavy working cycles, the dynamic analysis of the battery pack focuses on its low frequency behaviour. In this context, this paper focuses the attention on the dynamic behaviour of a battery pack, thought for a plug-in hybrid electric orchard tractor, through simulations obtained taking advantage of FEM and multibody software. In particular, it will be illustrated the dynamic behaviour of the battery pack while the tractor is moving on a bumpy road and when the tractor chassis is subjected to an impulsive load.

МОДЕЛЮВАННЯ ПРОЦЕСУ ШТАМПУВАННЯ ДІАФРАГМИ ЗГИНАННЯМ ЛИСТОВОЇ ЗАГОТОВКИ ЕЛАСТИЧНИМ СЕРЕДОВИЩЕМ

The method of stamping by an elastic medium is known for a long time and everywhere, and in favor of its further application, proves developments that allow the intensification of the stamping process by an elastic tool. Among these areas of improvement, the computer simulation of the process is particularly promising, which allows you to determine the energy-power parameters of the process, the behavior of the material throughout the process, as well as the stress-strain state of the workpiece, which allows you to shorten the time further in the development of processes for typical parts, as well as significantly reduce the cost of materials to conduct a series of experiments, reduce the complexity and time of technological preparation of production. It is this method as the most suitable for improving the stamping process at the current stage of development of domestic production, considered in this paper on the example of bending-molding sheet material. To solve the problems of forming, carried out in this work, the most rational is the use of the variation method or the FEM method. Both of these methods provide fairly accurate results, however, the advantage of FEM is its high applicability in various computer software products such as Nastran, Ansys, Katy, etc., which allows to optimize the process of obtaining data by reducing the calculation time, as well as the most optimal the ability to make changes and adjustments to the process without the need to spend time on manual recalculation.

Hybrid numerical method for effective design of silicon micromotor

Purpose – This paper aims to focus on the hybrid numerical method for effective design of silicon micromotor.Design/methodology/approach – In this work, the authors introduced finite element methods combined with LUA and Matlab. The paper focuses on analysis of electrostatic micromotor and uses computer simulation procedure leading to new structure design.Findings – This strategy enables changing of all parameters of the micromotors MEMS. Moreover, this strategy allows for taking advantage of FEM, namely possibility of calculations of complicated geometries (different electromagnetic devices too) without additional operations.Originality/value – A novel strategy in computer modeling of micromotor MEMS, based on the fast and very efficient hybrid method for analysis and design, is proposed.