Static and dynamic stability analysis of an asymmetric sandwich beam resting on a variable pasternak foundation subjected to thermal gradient

Meccanica ◽  
2015 ◽  
Vol 51 (3) ◽  
pp. 725-739 ◽  
Author(s):  
M. Pradhan ◽  
P. R. Dash ◽  
P. K. Pradhan
Keyword(s):  
Stability Analysis ◽  
Dynamic Stability ◽  
Thermal Gradient ◽  
Sandwich Beam ◽  
Pasternak Foundation ◽  
Static And Dynamic Stability

scholarly journals Static and Dynamic Stability Analysis of an Asymmetric Rotating Tapered Sandwich Beam Subjected to Pulsating Axial Load with Thermal Gradient

2019 ◽  
Vol 24 (4) ◽  
pp. 665-676
Author(s):  
Madhusmita Pradhan ◽  
Pushparaj Dash
Keyword(s):  
Boundary Conditions ◽  
Dynamic Stability ◽  
Thermal Gradient ◽  
Axial Load ◽  
Equations Of Motion ◽  
Core Loss ◽  
Sandwich Beam ◽  
Density Parameter ◽  
Static And Dynamic Stability ◽  
Elastic Layers

The static and dynamic stability of an asymmetric rotating tapered sandwich beam subjected to pulsating axial load in temperature environment is studied under two different boundary conditions. The non-dimensional equations of motion and the boundary conditions are derived by applying Hamilton's energy principle. A coupled Hill's equations with complex coefficients are derived from the non-dimensional equations of motion by the application of the generalized Galerkin method. By the application of the Saito-Otomi conditions, zones of instabilities are obtained and presented graphically. For the calculation of the Young's module for the elastic layers, the effect of temperature has been taken in to consideration by means of a uniform thermal gradient along the longitudinal axes for both the upper and lower elastic layers. The effects of the taper parameter, core loss factor, thermal gradient, rotational speed, hub radius, and core density parameter on the static buckling loads and the regions of instability are investigated.

Static and dynamic stability analysis of a steel-rubber isolator with rubber cores

Structures ◽  
2020 ◽  
Vol 26 ◽  
pp. 441-455 ◽  
Author(s):  
Rohola Rahnavard ◽  
Helder D. Craveiro ◽  
Rebecca Napolitano
Keyword(s):  
Stability Analysis ◽  
Dynamic Stability ◽  
Static And Dynamic Stability ◽  
Rubber Isolator

Static and dynamic stability of an axially compressed five-layer sandwich beam

2015 ◽  
Vol 90 ◽  
pp. 23-30 ◽  
Author(s):  
M.J. Smyczynski ◽  
E. Magnucka-Blandzi
Keyword(s):  
Dynamic Stability ◽  
Sandwich Beam ◽  
Static And Dynamic Stability

Static and Dynamic Stability Analysis on Artificial Rock Mass Slope Using Strength Reduction Method

2013 ◽  
Vol 368-370 ◽  
pp. 1774-1780
Author(s):  
Shi Yan ◽  
Hai Tao Du ◽  
Qi Le Yu ◽  
Han Yan
Keyword(s):  
Rock Mass ◽  
Stability Analysis ◽  
Slope Stability ◽  
Dynamic Stability ◽  
Rock Slope ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Artificial Rock ◽  
Static And Dynamic Stability

This paper focuses on stability analysis of an artificial rock mass slope by a nonlinear finite element method (FEM). For a long time, rock slope stability problem is always an important research issue in the field of geotechnical engineering, which is related to human life and property safety as well as engineering security and efficiency. Therefore, the stability analysis and evaluation on rock slope is of great significance. The static and dynamic stability analysis on the artificial rock mass slope of WuAn power plant in China is carried on respectively in this paper by using the strength reduction method and FLAC3D software. In this analysis, static and dynamic instability criterions are enumerated, and the static and dynamic safety factors are calculated with the developed criterions of the displacement mutation, respectively. The analysis results show that the artificial rock mass slope is basically stable. It indicates that analyzing slope stability with strength reduction method is feasible.

Static and Dynamic Handling Stability of Server Rack Computers

2014 ◽  
Author(s):  
Budy D. Notohardjono ◽  
Robert Sanders
Keyword(s):  
Finite Element ◽  
Stability Analysis ◽  
Finite Element Modeling ◽  
Dynamic Stability ◽  
Mechanical Energy ◽  
Static Stability ◽  
Element Modeling ◽  
Static And Dynamic Stability ◽  
Maximum Angle ◽  
Mechanical Handling

This paper discusses the static and dynamic stability analysis of rack or frame computer/server products during shipping and relocation. The static stability is the ability of server products to resist tipping over on a typical raised floor in a datacenter or when it is installed in its operational product environment. The dynamic stability is the ability to resist tipping over when a velocity change occurs during re-location either on flat or inclined planes. The product consists of a frame or a rack in which components such as processor units, input-output units and power supplies are installed. The static stability analysis presented here calculates the tip over threshold angle, which is the maximum angle of an inclined plane on which the product can be placed without tipping over. The location of the installed components in a frame, the dimension and weight of the installed components, and the dimension of the product dictate the overall static stability of the product. Specifically, those parameters affect the location of the center of gravity of the product and the tip over threshold angle. The tip over threshold angle is a critical parameter influencing the dynamic stability of the product.. The dynamic stability of an unpackaged product moving on casters can be calculated using the conservation of mechanical energy principle. Finite element modeling is a good way to evaluate the dynamic stability of a product during manual handling or mechanical handling; for instance, on a forklift. The objective of the finite element modeling is to provide guidelines on the maximum speed, minimum radius curvature, and safe turning speed of a forklift when transporting a product. The main objective of the analysis presented here is to provide a method for analyzing the static and dynamic stability of a rack style computer server product during shipping, relocation, and handling.

Static and Dynamic Stability Analysis of a Rotating Taper Beam Having Elliptical Cross Section Subjected to Pulsating Axial Load With Thermal Gradient

2019 ◽  
Vol 24 (3) ◽  
pp. 440-450
Author(s):  
Madhusmita Pradhan ◽  
Mrunal Kanti Mishra ◽  
Pushparaj Dash
Keyword(s):  
Dynamic Stability ◽  
Cross Section ◽  
Thermal Gradient ◽  
Axial Load ◽  
Equations Of Motion ◽  
Elliptical Cross Section ◽  
Energy Principle ◽  
Elliptical Cross ◽  
Static And Dynamic Stability ◽  
Hill’S Equations

The static and dynamic stability of a rotating tapered beam having an elliptical cross-section subjected to a pulsating axial load with a thermal gradient is investigated under three different boundary conditions, such as clampedclamped (C-C), clamped-pinned (C-P), and pinned-pinned (P-P). The governing equations of motion have been derived by using Hamilton’s energy principle. A set of Hill’s equations have been obtained by the application of generalized Galerkin’s method. The effects of taper parameter, hub radius, rotational speed, thermal gradient, and geometric parameter on the static buckling loads and the regions of instability have been studied and the results are presented graphically

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