Modal Sensitivity Analysis of PCB

2011 ◽  
Vol 199-200 ◽  
pp. 1308-1313 ◽  
Author(s):  
Tao Hu ◽  
Ping An Du ◽  
John H.L Ha ◽  
Jian Tao Liu
Keyword(s):  
Finite Element Analysis ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Structural Optimization ◽  
Natural Frequency ◽  
Design Parameters ◽  
Element Analysis ◽  
Nature Frequency

By studying a typical rectangle PCB, the design parameters affecting natural frequency of PCB are found in the paper. By theoretical deduction and finite element analysis, the sensitivity of the natural frequency of PCB with respect to the design parameters is analyzed, the influence of the design parameters on nature frequency is obtained, and some conclusions for structural optimization of PCB are drawn.

Nonlinear FEA of a Corroded Pipe

2015 ◽  
Author(s):  
Venkata M. K. Akula
Keyword(s):  
Finite Element Analysis ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Structural Response ◽  
Design Parameters ◽  
Collapse Load ◽  
Safe Operation ◽  
Element Analysis ◽  
Parametric Sensitivity ◽  
Newton Raphson

Analysis of pipelines subjected to corrosion is critical to ensure their integrity and safe operation. Although regulatory codes such as ASME, API, etc. can provide guidance in determining the fitness of a pipeline, often finite element analysis is needed to more accurately predict the structural response. In this paper, we present the techniques that could be used for performing buckling analysis of a pipe with a surface flaw. Several procedures, available in Abaqus, such as the nonlinear Newton-Raphson solver, the implicit dynamics solver, etc. are discussed in the context of predicting the collapse load. The assumptions associated with the use of each solver are presented along with a discussion on their predictive capabilities. Thereafter, parametric sensitivity analysis to study the influence of the design parameters on the collapse load is discussed. The sensitivity analysis requires automating the entire simulation workflow, including the flaw geometry, for predicting the collapse load.

Effects of Core Height, Cell Angle and Face Thickness on Vibration Behavior of Aircraft Sandwich Structure with Honeycomb Core: An Experimental and Numerical Investigations

2021 ◽  
Vol 1039 ◽  
pp. 65-85
Author(s):  
Muhsin Jaber Jweeg ◽  
S.H. Bakhy ◽  
S.E. Sadiq
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Natural Frequency ◽  
Sandwich Structure ◽  
Damping Ratio ◽  
Design Parameters ◽  
Honeycomb Core ◽  
Element Analysis ◽  
Vibration Behavior ◽  
Core Height

The aim of the present paper is to study the vibration behavior of a sandwich structure with honeycomb core experimentally and numerically with different design parameters. The natural frequency and damping ratio were obtained. Core height, cell angle and face thickness were considered as design parameters. Finite element models for the honeycomb sandwich were developed and analyzed via ANSYS finite element analysis (FEA) software. Response Surface Method (RSM) is used to establish numerical methodology to simulate the effect of the design parameters on natural frequency and damping ration. The employment of (RSM) provides a study of the effect of design parameters on natural frequency and damping ratio, numerical modeling of them in term of design parameters and specifying optimization condition. The experimental tests were conducted on sandwich specimens for the validity goal of the previous models created via the finite element analysis. The obtained results show that the natural frequency is directly proportional to the core height and face thickness, while it is inversely proportional to cell angle, Vice versa for damping ratio. Moreover, the optimum value of natural frequency (209.031 Hz) as minimum and damping ratio (0.0320) as maximum were found at 4.8855 mm of core height, 26.770 cell angle and 0.0614 mm face thickness.

Finite Element Analysis and Optimization of the Truss of Installing Wave-Maker Based on ANSYS

2013 ◽  
Vol 313-314 ◽  
pp. 1038-1041
Author(s):  
Shou Jun Wang ◽  
Xing Xiong ◽  
Chao Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Parameters ◽  
Analysis Software ◽  
Element Analysis ◽  
Large Span ◽  
The Finite Element Analysis ◽  
Wave Maker

According to uncertainty of the design parameters for large span truss of installing wave-maker, in order to avoid the waste of materials,the truss is analyzed based on the finite element analysis software ANSYS to find out its weaknesses and various parts of the deformation. On the premise of ensuring the intensity and stiffness, the weight of the truss is reduced by adjusting its sizes and selecting different profiles, so as to achieve the optimization of the truss of installing wave-maker.

scholarly journals Mechanical analysis on design parameters for adhesion bridge. Part 2 Finite element analysis of infuluence of thickness, shape and materials on pealing loads.

1986 ◽  
Vol 30 (4) ◽  
pp. 920-928
Author(s):  
Yoshinobu Maeda ◽  
Masafumi Mori ◽  
Sadami Tsutsumi ◽  
Toshihiro Chinzaka ◽  
Masataka Minoura ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Analysis ◽  
Design Parameters ◽  
Element Analysis

scholarly journals Optimization of Design Parameters of Spiral Spring for Active Headrest Deployment

2018 ◽  
Vol 167 ◽  
pp. 02017
Author(s):  
Yunsik Yang ◽  
Euy Sik Jeon ◽  
Dae Ho Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Relative Motion ◽  
Design Parameter ◽  
Development Time ◽  
Design Parameters ◽  
Element Analysis ◽  
Spiral Spring ◽  
The Finite Element Analysis

Several studies have been conducted to prevent neck injury in rear-end collision. The headrest of the seat which suppresses the relative motion of the head and the torso can suppress the extension of the head, thereby alleviating the injury. The active headrest has a mechanism that supports the head by deploying the headrest at the rear-end collision. The spring remains compressed or twisted until a collision signal is generated and the headrest is deployed after the collision signal. Depending on the shape and deployment structure of the spring, a spring design with a high resilience that is acceptable to the headrest is required. In this paper, design parameter of spiral spring suitable for the structure of the developed headrest is selected, prototypes are fabricated, and development parameters such as development time and development distance are checked and optimal design parameters of the spiral spring are derived. The feasibility of the headrest with the designed spiral spring was verified by the finite element analysis.

Investigation of stiffness of small wind turbine blade based on vibration analysis technique

2019 ◽  
Vol 44 (1) ◽  
pp. 49-59
Author(s):  
Nilesh Chandgude ◽  
Nitin Gadhave ◽  
Ganesh Taware ◽  
Nitin Patil
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wind Turbine ◽  
Natural Frequency ◽  
Vibration Analysis ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Element Analysis ◽  
Finite Element Software ◽  
Small Wind Turbine

In this article, three small wind turbine blades of different materials were manufactured. Finite element analysis was carried out using finite element software ANSYS 14.5 on modeled blades of National Advisory Committee for Aeronautics 4412 airfoil profile. From finite element analysis, first, two flap-wise natural frequencies and mode shapes of three different blades are obtained. Experimental vibration analysis of manufactured blades was carried out using fast Fourier transform analyzer to find the first two flap-wise natural frequencies. Finally, the results obtained from the finite element analysis and experimental test of three blades are compared. Based on vibration analysis, we found that the natural frequency of glass fiber reinforced plastic blade reinforced with aluminum sheet metal (small) strips increases compared with the remaining blades. An increase in the natural frequency indicates an increase in the stiffness of blade.

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