scholarly journals Dynamical Simulation of A CNC Turning Centre (Survey Paper)

2020 ◽  
Vol 10 (2) ◽  
pp. 85-90
Author(s):  
Al-Zgoul Mohammad ◽  
Attila Szilágyi
Keyword(s):  
Transfer Matrix Method ◽  
Degree Of Freedom ◽  
Cnc Turning ◽  
Rotor Systems ◽  
Survey Paper ◽  
Single Degree ◽  
Dynamical Simulation ◽  
Infinite Degree ◽  
Turning Center ◽  
Cnc Turning Centre

This paper shows the most common rotor systems which can be used to analyse a CNC turning center. Starting with the simplest rotor system representation (single-degree-offreedom) up to analysing multi-degree-of-freedom and infinite-degree-of-freedom rotor systems using the TMM (Transfer Matrix Method) when it comes to cases like multi desk rotors and Jeffcott-rotors.

scholarly journals Dynamical simulation of a CNC turning centre

2020 ◽  
Vol 10 (2) ◽  
pp. 91-96
Author(s):  
Al-Zgoul Mohammad ◽  
Attila Szilágyi
Keyword(s):  
Natural Frequencies ◽  
Fem Analysis ◽  
Spindle System ◽  
Cnc Turning ◽  
Dynamical Simulation ◽  
Influence Coefficients ◽  
Cnc Turning Centre ◽  
The Way

This paper deals with the analysis of a CNC turning centre, more specifically the spindle system. The FEM analysis shows the natural frequencies of the spindle system and the same system was analysed by using the TMM and the influence coefficients method. These analyses pave the way to compare these three methods.

scholarly journals Thermal and structural simulations of a CNC turning centre

2020 ◽  
Vol 10 (2) ◽  
pp. 11-19
Author(s):  
Sebastian Cabezas ◽  
Attila Szilágyi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Steady State ◽  
Control Volume ◽  
Stationary System ◽  
Element Analysis ◽  
Cnc Turning ◽  
Turning Center ◽  
Cnc Turning Centre

This article shows the application of Finite Element Analysis FEA using Siemens NX 12 Nastran for thermal and structural simulations of a CNC turning center CTX Alpha500 Gildemeister. The simulations were performed under steady state conditions, stationary system, the heat generated by the workpiece and the machine is neglected and the control volume remains constant.

Kinematic comparison of single degree-of-freedom robotic gait trainers

2021 ◽  
Vol 159 ◽  
pp. 104258
Author(s):  
Jeonghwan Lee ◽  
Lailu Li ◽  
Sung Yul Shin ◽  
Ashish D. Deshpande ◽  
James Sulzer
Keyword(s):  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Robotic Gait

Single-Degree-of-Freedom Based Pressure-Impulse Diagrams for Blast Damage Assessment

2014 ◽  
Vol 567 ◽  
pp. 499-504 ◽  
Author(s):  
Zubair Imam Syed ◽  
Mohd Shahir Liew ◽  
Muhammad Hasibul Hasan ◽  
Srikanth Venkatesan
Keyword(s):  
Damage Assessment ◽  
Structural Response ◽  
Blast Loading ◽  
Computational Effort ◽  
Degree Of Freedom ◽  
Negative Phase ◽  
Single Degree Of Freedom ◽  
Pressure Impulse ◽  
Single Degree ◽  
Structural Resistance

Pressure-impulse (P-I) diagrams, which relates damage with both impulse and pressure, are widely used in the design and damage assessment of structural elements under blast loading. Among many methods of deriving P-I diagrams, single degree of freedom (SDOF) models are widely used to develop P-I diagrams for damage assessment of structural members exposed to blast loading. The popularity of the SDOF method in structural response calculation in its simplicity and cost-effective approach that requires limited input data and less computational effort. The SDOF model gives reasonably good results if the response mode shape is representative of the real behaviour. Pressure-impulse diagrams based on SDOF models are derived based on idealised structural resistance functions and the effect of few of the parameters related to structural response and blast loading are ignored. Effects of idealisation of resistance function, inclusion of damping and load rise time on P-I diagrams constructed from SDOF models have been investigated in this study. In idealisation of load, the negative phase of the blast pressure pulse is ignored in SDOF analysis. The effect of this simplification has also been explored. Matrix Laboratory (MATLAB) codes were developed for response calculation of the SDOF system and for repeated analyses of the SDOF models to construct the P-I diagrams. Resistance functions were found to have significant effect on the P-I diagrams were observed. Inclusion of negative phase was found to have notable impact of the shape of P-I diagrams in the dynamic zone.

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