Sobol’s sensitivity analysis of stability problems of steel beams

2014 ◽  
pp. 2315-2319
Author(s):  
Z Kala ◽  
J Kala
Keyword(s):  
Sensitivity Analysis ◽  
Steel Beams ◽  
Stability Problems ◽  
Analysis Of Stability

Simulationsbasierte Fräsprozessauslegung*/Simulation-based design of milling-processes - Sensitivity analysis of stability lobe diagrams for automotive large-scale production

2017 ◽  
Vol 107 (11-12) ◽  
pp. 841-846
Author(s):  
J. Rempel ◽  
P. Jacobi ◽  
J. Friedrich ◽  
A. Prof. Verl ◽  
P. Prof. Wiederkehr ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Large Scale ◽  
Scale Production ◽  
Stability Lobe ◽  
Receptance Coupling ◽  
Large Scale Production ◽  
Simulation Based Design ◽  
Analysis Of Stability ◽  
Stability Limits ◽  
Stability Lobe Diagrams

In diesem Fachartikel werden die Einflüsse von Unsicherheiten in den Modellparameterwerten auf die Stabilitätsgrenze einer Stabilitätskarte aufgezeigt. Dazu wird an einem Beispielsystem eine Sensitivitätsanalyse für ein Verfahren zur Erzeugung von Stabilitätskarten durchgeführt. Zur Bestimmung des dynamischen Verhaltens der Werkzeugmaschine kommt eine Methode der Frequenzgang-Kopplung zum Einsatz.   To estimate the effect of uncertainties on the prediction of stability limits, a sensitivity analysis was conducted for a procedure to determine stability lobe diagrams for an example system. Thereby, a method of receptance coupling to identify the dynamic behavior of the tool center point was applied.

Finite Element Analysis of Stability Bearing Capacity in Moment Plane of Castellated Steel Components

2014 ◽  
Vol 1065-1069 ◽  
pp. 1191-1194
Author(s):  
Zhen Yu Liang ◽  
Lin Geng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Engineering Design ◽  
Economic Benefits ◽  
Steel Beams ◽  
Element Analysis ◽  
Finite Element Software ◽  
Stability Bearing Capacity ◽  
Analysis Of Stability

Recently, polygon hole castellated steel beams have been studied and applied which had better social and economic benefits. But it brings more difficulties to extend castellated steel components that less studies of castellated bending members. In this essay, ANSYS that is a kind of finite element software had been used to analyze castellated bending members, and characteristics of stability bearing capacity in moment plane of regular hexagon hole castellated steel components had been studied that can provide references to engineering design.

Frequency-Domain Sensitivity Analysis of Stability of Nonlinear Vibrations for High-Fidelity Models of Jointed Structures

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
E. P. Petrov
Keyword(s):  
Sensitivity Analysis ◽  
Frequency Domain ◽  
Large Scale ◽  
Nonlinear Vibrations ◽  
Forced Response ◽  
Design Parameters ◽  
Analysis Of Stability ◽  
The Stability ◽  
Stability Regime ◽  
First Time

For the analysis of essentially nonlinear vibrations, it is very important not only to determine whether the considered vibration regime is stable or unstable but also which design parameters need to be changed to make the desired stability regime and how sensitive is the stability of a chosen design of a gas-turbine structure to variation of the design parameters. In the proposed paper, an efficient method is proposed for a first time for sensitivity analysis of stability for nonlinear periodic forced response vibrations using large-scale models structures with friction, gaps, and other types of nonlinear contact interfaces. The method allows using large-scale finite element (FE) models for structural components together with detailed description of nonlinear interactions at contact interfaces. The highly accurate reduced models are applied in the assessment of the sensitivity of stability of periodic regimes. The stability sensitivity analysis is performed in frequency domain with the multiharmonic representation of the nonlinear forced response amplitudes. Efficiency of the developed approach is demonstrated on a set of test cases including simple models and large-scale realistic blade model with different types of nonlinearities, including friction, gaps, and cubic elastic nonlinearity.

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