Dynamics of Machines and Hydraulic Systems: Mechanical Vibrations and Pressure Pulsations

The subject of this book is to examine the influence of mechanical vibration on the changes in the pressure pulsation spectrum of hydraulic systems. In book shows that machines and equipment equipped with hydraulic systems are a source of vibration with a wide frequency spectrum. Additionally, hydraulic valves are also exposed to vibration. Vibrations of the substrate on which the hydraulic valve is installed force the control element of the hydraulic valve to vibrate. The control element’s vibration produced in this way causes changes in the pressure pulsation spectrum of the hydraulic system. A friction model modified using mixed friction theory can be used for the oscillating motion of the hydraulic directional control spool. Passive vibration isolation methods are proposed to reduce valve vibration. The biomimetic approach can be implemented in hydraulic systems (for pipelines) to reduce mechanical vibration and fluid pulsation. Numerical methods are employed to analyze the effectof changes in the pressure pulsation spectrum on the hydraulic efficiency of the pipelines. Examples are provided for the implementation of numerical methods in the calculation of hydraulic components and systems. Additionally, the effects of energy-saving in hydraulic systems by applying the proposed results overview in the current book. The current book will be interesting for both-scientific and manufacturing staff, since the implementation of knowledge can help to design more substantiable construction of machine hydraulic systems to avoid vibration problems.

Michal Stosiak was born on August 10 1977 in Wroclaw (Poland). In 2001 at Wroclaw University of Science and Technology he acquired Master`s degree in Mechanical Engineering. In 2005 defended PhD dissertation at Wroclaw University of Science and Technology and obtained Doctoral degree in Mechanical Engineering, construction and operation of machinery, hydraulic drive and control. In 2015 defended Habilitation at Wroclaw University of Science and Technology and obtained Doctor of Science (Dr. Habil.) degree in Mechanical Engineering. From 2017 working in Associate Professor position at the Mechanical Engineering Faculty of Wroclaw University of Science and Technology. Deputy Head of Department of Technical Systems Operation and Maintenance, former Head of Department of Hydraulic Drives and Automatics. Author of almost 300 scientific publications in Mechanical Engineering field author of 7 patents and 6 patents applications. The main research direction interests include: hydraulics, vibrations, pressure pulsation and damping, noise, hydrodynamics, frequency and vibration analysis, application of composite materials.
Mykola Karpenko was born on May 29 1994 in Myronovka (Kyiv region, Ukraine). In 2015 at Kyiv National University of Construction and Architecture he acquired Master`s degree in Mechanical Engineering. In 2021 defended PhD dissertation at Vilnius Gediminas Technical University and obtained Doctoral degree in Transport Engineering. From 2022 working in Associate Professor position at the Transport Engineering Faculty of Vilnius Gediminas Technical University. Author of more than 60 scientific publications in Mechanical and Transport Engineering fields. The main research direction interests include: hydrodynamics, numerical simulation, FEA & CFD, frequency and vibration analysis.