http://arthra.ugal.ro/handle/20.500.14043/24640 2026-04-04T09:07:19Z http://arthra.ugal.ro/handle/20.500.14043/24651 The Inclusion in the Calculation Schemws for Numerical Simulation of the Pressures Drop on Inlet and Outlet of Hydraulic circuits Hauk, Niculai Numerical simulation of the operation of hydraulic systems acting on hydraulic cylinderst is based on differential equations that describe the equilibrium of forces and the continuity of the flow rate. To simplify the calculations it is assumed that the pressures on hydraulic circuits on inlet and outlet are constant. This approximation is far from reality, especially in conditions of increasing the working speeds. This paper presents a possibility to eliminate this drawback. It is considered that the variable hydraulic flows admitted and discharged from the hydraulic cylinder, will create pressure drop on each of the various components of the hydraulic system. The pressure made by the hydraulic pump is dissipating on all hydraulic resistances and on the hydraulic cylinder piston. By integrating the system of differential equation, it is possible to determine the law of motion of the piston and, implicitly, the pressure drops across each component of the hydraulic system. The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING, ISSN 1224 - 5615 2014-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/24650 NX Siemens - Integrated Solution of PLM Mechanical Design Goanță, Adrian Mihai; Nedelcuț, Florin This paper presents a description of the integrated solution for the SIEMENS NX design – meeting the principles of the concept Product Lifecycle Management (PLM). There is also a succinct explanation of the origin and the way of defining the concept of PLM. All these notions are presented making reference to the prototype design of an equipment of digging potholes for planting trees. The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING, ISSN 1224 - 5615 2014-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/24649 "NX Manufacturing" - Digital Manufacturing Integrated Solution for PLM Goanță, Mihai; Eftimie, Dorin This paper presents a description of the integrated manufacturing solution produced by Siemens NX MANUFACTURING INDUSTRY SOFTWARE - that respects the principles of the concept of Product Lifecycle Management (PLM). It's also made a succinct explanation of the origin and the way of defining the concept of PLM. All these notions are presented making reference to digital production system. The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING, ISSN 1224 - 5615 2014-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/24648 Gyratory Crusher Bucket-type Attached to the Excavator Arm Eftimie, Dorin The paper aims to present a new technological solution of a crusher bucket-type attached to excavator arm. The optimized solution of the gyratory crusher bucket type is the computer aided design (CAD) which enables virtual prototyping for evidence of standardized sizes The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING, ISSN 1224 - 5615 2014-01-01T00:00:00Z