Sensitivity analysis of shoulder joint muscles by using the FEM model

2016 ◽  
Vol 3 (2) ◽  
pp. 115-127
Author(s):  
Shriniwas.S. Metan ◽  
G.C. Mohankumar ◽  
Prasad Krishna
Keyword(s):  
Sensitivity Analysis ◽  
Shoulder Joint ◽  
Fem Model

scholarly journals ADJOINT APPROACH SENSITIVITY ANALYSIS OF THIN‐WALLED BEAMS AND FRAMES

2005 ◽  
Vol 11 (1) ◽  
pp. 57-64 ◽  
Author(s):  
Ireneusz Kreja ◽  
Tomasz Mikulski ◽  
Czeslaw Szymczak
Keyword(s):  
Sensitivity Analysis ◽  
Cross Section ◽  
Fem Model ◽  
Static Loads ◽  
Shell Elements ◽  
Beam Elements ◽  
Thin Walled ◽  
The One ◽  
Adjoint Approach ◽  
Open Cross Section

Sensitivity analysis of beams and frames assembled of thin‐walled members is presented within the adjoint approach. Static loads and structures composed of thin‐walled members with the bisymmetrical open cross‐section are considered. The analysed structure is represented by the one‐dimensional model consisting of thin‐walled beam elements based on the classical assumptions of the theory of thin‐walled beams of non‐deformable cross‐section together with superelements applied in place of location of structure nodes, restraints and stiffeners. The results of sensitivity analysis, obtained for the structure model described above, are compared with the results of the detailed FEM model, where the whole structure is discretised with the use of QUAD4 shell elements of the system MSC/NASTRAN.

scholarly journals Numerical Modelling of Structures with Uncertainties

2017 ◽  
Vol 24 (s1) ◽  
pp. 125-132 ◽  
Author(s):  
Maciej Kahsin
Keyword(s):  
Sensitivity Analysis ◽  
Modal Analysis ◽  
Complex Structure ◽  
Offshore Wind ◽  
Laboratory Model ◽  
Offshore Wind Turbine ◽  
Surface Model ◽  
Model Parameters ◽  
Fem Model ◽  
Supporting Structure

Abstract The nature of environmental interactions, as well as large dimensions and complex structure of marine offshore objects, make designing, building and operation of these objects a great challenge. This is the reason why a vast majority of investment cases of this type include structural analysis, performed using scaled laboratory models and complemented by extended computer simulations. The present paper focuses on FEM modelling of the offshore wind turbine supporting structure. Then problem is studied using the modal analysis, sensitivity analysis, as well as the design of experiment (DOE) and response surface model (RSM) methods. The results of modal analysis based simulations were used for assessing the quality of the FEM model against the data measured during the experimental modal analysis of the scaled laboratory model for different support conditions. The sensitivity analysis, in turn, has provided opportunities for assessing the effect of individual FEM model parameters on the dynamic response of the examined supporting structure. The DOE and RSM methods allowed to determine the effect of model parameter changes on the supporting structure response.

scholarly journals Axial and Pressure Thrust Stiffness of Metal Bellows for Vibration Isolators

2018 ◽  
Vol 153 ◽  
pp. 06001 ◽  
Author(s):  
Macháček Ondřej ◽  
Kubík Michal ◽  
Strecker Zbyněk ◽  
Roupec Jakub ◽  
Novák Petr ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Dynamic Behaviour ◽  
Axial Stiffness ◽  
Axial Deformation ◽  
Fem Model ◽  
Vibration Isolators ◽  
Spring Element ◽  
Metal Bellows ◽  
Dimensional Parameters ◽  
Dimension Parameter

Metal bellows are used as a spring element and simultaneously as a container (shell) for a damping medium in vibration isolators, especially in applications where any leakage is inadmissible. Dynamic behaviour of these isolators is affected by axial stiffness of bellows and by a resistance against axial deformation of bellows filled with fluid, which is in this article called pressure thrust stiffness. A method of the pressure thrust stiffness determination is discussed in this study. The method uses FEM model, which has been verified by stiffness measurement of a chosen bellows. Consequently, the sensitivity analysis of bellows dimensions to axial and pressure thrust stiffness was performed to find a dimension parameter of bellows which allows to adjust the ratio between axial and pressure thrust stiffness. Sensitivity analysis shows that the stiffness ratio of metal bellows can be adjusted by two dimensional parameters - mean diameter of bellows and corrugation width.

The Analysis of Static and Dynamic Characteristics of Motorized High-Speed Spindle Based on Sensitivity Analysis of FEM Model

2010 ◽  
Vol 43 ◽  
pp. 376-381
Author(s):  
Song Mei Yuan ◽  
Mao Bin Lv ◽  
Xue Hao Liu
Keyword(s):  
Sensitivity Analysis ◽  
Objective Function ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Design Sensitivity ◽  
Design Parameters ◽  
Static Stiffness ◽  
Fem Model ◽  
Static And Dynamic Characteristics

In order to estimate the static and dynamic characteristics of motorized high-speed spindle, the full parameterized FEM model of it is established and studied in the paper. After the FEM analysis of the spindle, the static stiffness, natural frequency and normal modes of vibration are obtained. Then, a design sensitivity analysis of some design parameters is conducted based on the finite element model to investigate their influence on the static stiffness and natural frequency of the spindle system. Through the sensitivity analysis, the optimal plan is proposed, the first natural frequency as the first objective function of optimization and the static stiffness as the second, which changes the objective function of multivariable into that of a single one. Therefore, it considerably increases the efficiency of optimization. The optimization leads to a noticeable improvement of static stiffness and first-mode natural frequency.

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