Dynamics of Machines and Hydraulic Systems: Mechanical Vibrations and Pressure Pulsations (Synthesis Lectures on Mechanical Engineering)

Preface
Contents
About the Authors
1 Vibrations in Machines Fitted with Hydraulic Systems
	1.1 Introduction
		1.1.1 Energy-Saving in Hydraulic Systems by Reduce Dynamic Loads—Mechanical and Hydraulic Vibrations
		1.1.2 Mechanical Vibrations in Machines Fitted with Hydraulic Systems
		1.1.3 Fluid Pulsation (Vibrations) in Machines Hydraulic Systems
		1.1.4 Objectives and Main Content of the Book
	References
2 Sources of Pressure Pulsation in the Machines Hydraulic Systems
	2.1 Pressure Pulsation Caused by the Pulsation of the Displacement Pump Capacity
		2.1.1 Single-Acting Vane Pump Capacity Pulsation
		2.1.2 Capacity Pulsation of an External-Meshing Gear Pump
		2.1.3 Capacity Pulsation of a Multi-piston Pump
		2.1.4 Comparison of Pumps Capacity Pulsation
	2.2 Pressure Pulsation Caused by Transients of Hydraulic Systems
	2.3 Pressure Pulsation Caused by External Mechanical Vibrations
	2.4 Pressure Pulsation Caused by Resonance Phenomena in a Hydraulic Transmission Line (Pipeline)
	References
3 Application of Numerical Methods for Evaluating the Effect of Pulsating Flow on Hydraulic Line Vibration
	3.1 Modelling of Fluid Flow from an Axial-Piston Pump and Transfer of Pulsation to the Pipeline
		3.1.1 Axial-Piston Mathematical Modelling
		3.1.2 Numerical Simulation of Fluid Flow Within a Pipeline
	3.2 Mathematical Model of Pipeline Deformation Due to Fluid Flow
	3.3 Flow Pulsation and Pipeline Vibration Modelling Results
		3.3.1 Results of Axial-Piston Pump Modelling and Validation
		3.3.2 Results of Pipeline Modelling—Fluid Flow and Vibration
	References
4 Transmission Pathways of Mechanical Vibration to Hydraulic Valves
	4.1 Models of Friction in Hydraulic Drive and Control Elements
	4.2 Identification of the Contribution of Damping to the Transmission of Mechanical Vibrations to the Valve Control Element. Physical Model
	4.3 Vibration of the Valve Control Element Caused by External Excitations
	4.4 Modeling and Experimental Verification of the Cooperation of the Spool Pair of the Hydraulic Directional Valve
		4.4.1 Experimental Testing
		4.4.2 Estimation of Parameters of Mathematical Models
	References
5 Reduction the Impact of Vibration on a Hydraulic Drive Components—Valves and Pipelines
	5.1 The Use of Elastic Support to Reduce Vibrations on the Directional Valve Body
	5.2 Experimental Verification of the Possibility of Reducing the Vibration of a Hydraulic Valve Using Spring Packs and Elastomeric Elements
	5.3 Theoretical Analysis for the Possible Reduction of Valve Vibrations
	5.4 Examples of Using Approximate Analytical Methods for the Analysis of Non-Linear Valve Vibration Reduction Systems
	5.5 Reduce Vibration in Hydraulic Systems by Biomimetic Approach Applied for Pipelines
	References
6 Energy-Saving Effects from Reducing Vibrations in Hydraulic System Elements—Valves and Pipelines
	6.1 Analysis of the Valve’s Energy Efficiency Based on the Research
	6.2 Analysis of the Pipeline’s Energy Efficiency
	References
7 Summary and Notes on Criteria for Effective Vibration Reduction of Hydraulic Valves
	References
Appendix: Extended Results of the Experimental Analysis on the Impact of Mechanical Vibrations on Selected Hydraulic Valves