A nodal analysis model for out-of-plane beamshaped electrothermal microactuators

2006 ◽  
Author(s):  
Rengang Li ◽  
Qing-an Huang ◽  
Weihua Li
Keyword(s):  
Analysis Model ◽  
Nodal Analysis ◽  
Out Of Plane

A nodal analysis model for the out-of-plane beamshape electrothermal microactuator

2008 ◽  
Vol 15 (2) ◽  
pp. 217-225 ◽  
Author(s):  
Rengang Li ◽  
Qing-An Huang ◽  
Weihua Li
Keyword(s):  
Analysis Model ◽  
Nodal Analysis ◽  
Out Of Plane

Out-of-Plane Deflection of Nonprismatic Curved Beam Structures Considering the Effect of Shear Deformation Solved by DQEM

2004 ◽  
Author(s):  
Chang-New Chen
Keyword(s):  
Shear Deformation ◽  
Differential Quadrature ◽  
Analysis Model ◽  
Beam Structures ◽  
Differential Quadrature Element Method ◽  
Quadrature Element Method ◽  
Out Of Plane ◽  
Deflection Analysis ◽  
Governing Differential Equation ◽  
Element Boundary

The development of differential quadrature element method out-of-plane deflection analysis model of curved nonprismatic beam structures considering the effect of shear deformation was carried out. The DQEM uses the differential quadrature to discretize the governing differential equation defined on each element, the transition conditions defined on the inter-element boundary of two adjacent elements and the boundary conditions of the beam. Numerical results solved by the developed numerical algorithm are presented. The convergence of the developed DQEM analysis model is efficient.

Random Seismic Response Analysis of Leaning-Type Arch Bridge

2011 ◽  
Vol 378-379 ◽  
pp. 332-336
Author(s):  
Yong He Li ◽  
Ai Rong Liu ◽  
Qi Cai Yu ◽  
Pan Tang ◽  
Fang Jie Cheng
Keyword(s):  
Bending Moment ◽  
Internal Force ◽  
Response Analysis ◽  
Analysis Model ◽  
Element Analysis ◽  
Arch Bridge ◽  
Space Truss ◽  
Out Of Plane ◽  
Plane Bending ◽  
The Impact

With an example of steel pipe concrete leaning-type arch bridge, space truss system Finite Element Analysis model is constructed using the Ruiz-Penzien random seismic vibration power spectrum model. The impact of inclined arch rib angle and the number of cross brace between main and stable arch ribs on the seismic internal force response under lateral random seismic excitation is also studied in this research. Research finding shows, the in-plane bending moment of main arch rib gradually increases with increasing stable arch rib angle and cross brace, whereas the out-of-plane bending moment and axial force display a decreasing trend. In general, this indicates that increasing stable arch rib angle and number of cross brace improves the lateral aseismatic performance of leaning-type arch bridge.

Out-of-Plane Stability Analysis of Crane Jib with Auxiliary Bracing

2014 ◽  
Vol 1078 ◽  
pp. 201-205
Author(s):  
Teng Fei Wang ◽  
Peng Lan ◽  
Nian Li Lu
Keyword(s):  
Differential Equation ◽  
Finite Element Method ◽  
Finite Element ◽  
Characteristic Equation ◽  
Order Effect ◽  
The Finite Element Method ◽  
Analysis Model ◽  
Lateral Direction ◽  
Out Of Plane ◽  
Deformation Compatibility

The analysis model is built to investigate the out-of-plane stability of crane jib with auxiliary bracing. Considering the second-order effect, the analytical expression of the out-of-plane buckling characteristic equation for the crane jib with auxiliary bracing is obtained by establishing the bending deflection differential equation of jib under the instability critical state with the method of differential equation. The equilibrium equation of the cable converging point in the lateral direction is introduced to solve the differential equation besides the boundary conditions and deformation compatibility equations. With the characteristic equation, the critical compression or the critical lifting load can be easily obtained. The characteristic equation is analytically expressed and the analytical results obtained agree very well with the finite element method (FEM) results. The validity of the characteristic equation is verified.

Out-Plane Distortion Induced Fatigue Analysis of Steel Bridges

2010 ◽  
Vol 452-453 ◽  
pp. 165-168
Author(s):  
Zhi Ping Wu ◽  
Chun Sheng Wang ◽  
Feng Cheng
Keyword(s):  
Numerical Models ◽  
Structural Parameters ◽  
Fatigue Cracking ◽  
Steel Bridge ◽  
Analysis Model ◽  
Ansys Software ◽  
Fatigue Stress ◽  
Double Curvature ◽  
Out Of Plane ◽  
The Web

Induced forces in secondary steel bridge members such as diaphragms and cross-bracing can cause out-of-plane distortion in webs that may lead to fatigue cracking. Such cracking is most likely to occur if the distortion must be accommodated in a short length of the web, such as in the gap between the end of transverse stiffeners and girder flanges, because the web gap is subject to double curvature. In this paper, the numerical analysis model of a real 3-span continue steel bridge was established using ANSYS software to calculate the real fatigue stress at the web gaps. Some key structural parameters, for example, web gap depth and web thickness, have been considered in the numerical models. The results show that web thickness and web gap depth give the great affection on the out-of-plane distortion fatigue stress at web gaps.

Shakedown Limits for Hillside Nozzles in Cylindrical Vessels

2018 ◽  
Vol 140 (3) ◽  
Author(s):  
Ahmed K. Bakry ◽  
Chahinaz A. Saleh ◽  
Mohammad M. Megahed
Keyword(s):  
Internal Pressure ◽  
High Pressures ◽  
Superposition Method ◽  
Analysis Model ◽  
Element Analysis ◽  
Nonlinear Superposition ◽  
Direct Technique ◽  
Out Of Plane ◽  
Shell Finite Element ◽  
Shakedown Limit

This research paper is concerned with the mechanical behavior of the cylindrical vessels with hillside nozzles when subjected to both pressure and nozzle bending loads in cyclic forms. The influence of hillside angle on shakedown (SD) limits of the connection under cyclic pressure and combined steady pressure with cyclic nozzle bending is investigated. A shell finite element analysis model is built for the assembly using five different hillside angles ranging from 0 deg to 40 deg. Shakedown limits are determined by a direct technique known as the nonlinear superposition method (NSM). Bree diagrams for cyclic out of plane opening (OPO)/in plane (IP) nozzle moments combined with steady internal pressure are determined. The results show an increase in both OPO and IP shakedown moments as the hillside angle is increased. In addition, the OPO shakedown limit moments for all hillside angles were found to be insensitive to the level of internal pressure; this differs from the IP shakedown moment which starts to decrease with pressure for the high pressures.

Out-of-Plane Vibration of Nonprismatic Curved Beam Structures Considering the Effect of Shear Deformation Solved by DQEM

2004 ◽  
Author(s):  
Chang-New Chen
Keyword(s):  
Shear Deformation ◽  
Vibration Analysis ◽  
Differential Quadrature ◽  
Analysis Model ◽  
Beam Structures ◽  
Plane Vibration ◽  
Differential Quadrature Element Method ◽  
Quadrature Element Method ◽  
Out Of Plane ◽  
Element Boundary

The development of differential quadrature element method out-of-plane vibration analysis model of curved nonprismatic beam structures considering the effect of shear deformation was carried out. The DQEM uses the differential quadrature to discretize the governing differential eigenvalue equation defined on each element, the transition conditions defined on the inter-element boundary of two adjacent elements and the boundary conditions of the beam. Numerical results solved by the developed numerical algorithm are presented. The convergence of the developed DQEM analysis model is efficient.

Vibroacoustic Characterization of a New Hybrid Wing-Body Fuselage Concept

2012 ◽  
Author(s):  
Albert Allen ◽  
Adam Przekop
Keyword(s):  
Energy Analysis ◽  
Acoustic Radiation ◽  
Analysis Model ◽  
Energy Correlation ◽  
Model Predictions ◽  
Out Of Plane ◽  
Thin Skin ◽  
Radiated Sound ◽  
Radiated Sound Power

A lighter, more robust airframe design is required to withstand the loading inherent to next generation non–cylindrical commercial airliners. The Pultruded Rod Stitched Efficient Unitized Structure concept, a highly integrated composite design involving a stitched and co-cured substructure, has been developed to meet such requirements. While this structure has been shown to meet the demanding out-of-plane loading requirements of the flat-sided pressurized cabin design, there are concerns that the stiff co-cured details will result in relatively high acoustic radiation efficiencies at frequencies well below the thin skin acoustic coincidence frequency. To address this concern and establish a set of baseline vibroacoustic characteristics, a representative test panel was fabricated and a suite of tests were conducted that involved measurements of panel vibration and radiated sound power during point force and diffuse acoustic field excitations. Experimental results are shown and compared with Finite Element and Statistical Energy Analysis model predictions through the use of modal and energy correlation techniques among others. The behavior of the structure subject to turbulent boundary layer excitation is also numerically examined.

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