Poroelastodynamic response of layered unsaturated media in the vicinity of a moving harmonic load

2021 ◽  
Vol 138 ◽  
pp. 104358
Author(s):  
Zi Ye ◽  
Zhi Yong Ai
Keyword(s):  
Harmonic Load ◽  
Unsaturated Media ◽  
Moving Harmonic Load

scholarly journals Study on dynamic response of track structures under a variable speed moving harmonic load

2017 ◽  
Vol 14 ◽  
pp. 214-219
Author(s):  
Yan Qi Liu ◽  
Yan Zhang ◽  
Chun Fang Song ◽  
Long Long Xu
Keyword(s):  
Dynamic Response ◽  
Harmonic Load ◽  
Variable Speed ◽  
Moving Harmonic Load

scholarly journals Dynamic analysis of prestressed Bernoulli beams resting on two-parameter foundation under moving harmonic load

2006 ◽  
Vol 28 (3) ◽  
pp. 176-188 ◽  
Author(s):  
Nguyen Dinh Kien ◽  
Bui Thanh Hai
Keyword(s):  
Dynamic Analysis ◽  
Moving Load ◽  
Excitation Frequency ◽  
Harmonic Load ◽  
Left Hand ◽  
Moving Harmonic Load ◽  
Load Vector ◽  
Hermitian Polynomials ◽  
Current Loading ◽  
Two Parameter

This paper describes the dynamic analysis of prestressed Bernoulli beams resting on a two-parameter elastic foundation under a moving harmonic load by the finite element method. Using the cubic Hermitian polynomials as interpolation functions for the deflection, the stiffness of the Bernoulli beam element augmented by that of the foundation support and prestress is formulated. The nodal load vector is derived using the polynomials with the abscissa measured from the left-hand node of the current loading element to the position of the moving load. Using the formulated element, the dynamic response of the beams is computed with the aid of the direct integration Newmark method. The effects of the foundation support, prestress as well as excitation frequency, velocity and acceleration on the dynamic characteristics of the beams are investigated in detail and highlighted.

scholarly journals VIBRATION OF 2D-FGSW TIMOSHENKO BEAMS UNDER A MOVING HARMONIC LOAD

2020 ◽  
Vol 58 (6) ◽  
pp. 760
Author(s):  
Kien Dinh Nguyen
Keyword(s):  
Moving Load ◽  
Excitation Frequency ◽  
Vibration Characteristics ◽  
Functionally Graded ◽  
Element Formulation ◽  
Harmonic Load ◽  
Timoshenko Beams ◽  
Power Functions ◽  
Material Inhomogeneity ◽  
Moving Harmonic Load

Vibration of two-directional functionally graded sandwich (2D-FGSW) Timoshenko beams under a moving harmonic load is investigated. The beams consist of three layers, a homogeneous core and two functionally graded skin layers with the material properties continuously varying in both the thickness and length directions by power functions. A finite element formulation is derived and employed to compute the vibration characteristics of the beams. The obtained numerical result reveals that the material inhomogeneity and the layer thickness ratio play an important role on the natural frequencies and dynamic response of the beams. A parametric study is carried out to highlight the effects of the power-law indexes, the moving load speed and excitation frequency on the vibration characteristics of the beams.  The influence of the beam aspect ratio on the vibration of the beams is also examined and discussed. 

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