Large Scale Nonlinear Dynamic Simulation of Flexible Risers with Detailed Finite Element Models - Part 1

2013 ◽  
Author(s):  
Arya Majed ◽  
Philip Cooper
Keyword(s):  
Finite Element ◽  
Dynamic Simulation ◽  
Nonlinear Dynamic ◽  
Large Scale ◽  
Finite Element Models ◽  
Flexible Risers

Micro-CT-Based Large Scale Linear Finite Element Models Predict the Strength of Human Thoracic and Lumbar Vertebral Bodies

2007 ◽  
Author(s):  
Yener N. Yeni ◽  
Do-Gyoon Kim ◽  
Roger R. Zauel ◽  
Evan M. Johnson ◽  
Dianna D. Cody
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Quantitative Computed Tomography ◽  
Finite Element Models ◽  
Micro Ct ◽  
Linear Finite Element ◽  
Vertebral Strength ◽  
Local Properties ◽  
Vertebral Bodies ◽  
Architectural Detail

Vertebral fractures are among the most common and debilitating fractures. Structural organization of cancellous and cortical bone in a vertebra and their local properties are important factors that determine the strength of a vertebra. Linear finite element models utilizing Quantitative Computed Tomography (QCT) images have proven useful for predicting vertebral strength and are potentially useful in predicting risk of fracture in a clinical setting [1]. However, the amount of architectural detail in these models is not sufficient for studying trabecular stress and strains, and their relationship with the microscopic structure, which is important for understanding the mechanisms behind vertebral fragility.

Toward the updating of large-scale dynamic finite element models using massive instrumentation

1996 ◽  
Author(s):  
Francois Hemez ◽  
Charbel Farhat ◽  
Emmanuele Decaux ◽  
Jacques Duysens ◽  
Pascal L
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Finite Element Models ◽  
Dynamic Finite Element

Penalty finite element models for nonlinear dynamic analysis

AIAA Journal ◽  
1986 ◽  
Vol 24 (2) ◽  
pp. 312-320 ◽  
Author(s):  
Ahmed K. Noor ◽  
Jeanne M. Peters
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic Analysis ◽  
Finite Element Models

An Adaptive Multi-Point Fast Frequency Sweep for Large-Scale Finite Element Models

2009 ◽  
Vol 45 (3) ◽  
pp. 1108-1111 ◽  
Author(s):  
A. Schultschik ◽  
O. Farle ◽  
R. Dyczij-Edlinger
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Finite Element Models ◽  
Frequency Sweep

Analysis of the Worst Mistuning Patterns in Bladed Disk Assemblies

2003 ◽  
Vol 125 (4) ◽  
pp. 623-631 ◽  
Author(s):  
E. P. Petrov ◽  
D. J. Ewins
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Optimization Problem ◽  
Element Model ◽  
Design Parameters ◽  
Finite Element Models ◽  
Bladed Disks ◽  
Bladed Disk ◽  
The Many

The problem of determining the worst mistuning patterns is formulated and solved as an optimization problem. Maximum resonant amplitudes searched across the many nodes of a large-scale finite element model of a mistuned bladed disk and across all the excitation frequencies in a given range are combined into an objective function. Individual blade mistuning is controlled by varying design parameters, whose variation range is constrained by manufacture tolerances. Detailed realistic finite element models, which have so far only been used for analyzing tuned bladed disks, are used for calculation of the forced resonant response of mistuned assemblies and for determination of its sensitivity coefficients with respect to mistuning variation. Results of the optimum search of mistuning patterns for some practical bladed disks are analyzed and reveal higher worst cases than those found in previous studies.

Sign in / Sign up

Export Citation Format

Share Document