Results 61 to 70 of about 692 (138)

Investigation on Principal Stress Rotation and Instability Mechanism of Coal Pillar Induced by Key Strata Bending Deformation Near Goaf

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
Coal mining will lead to rock strata bending deformation and the redistribution of stress field. The change of principal stress magnitude and direction will influence the failure zone distribution of the coal pillar, which determines the stability and safety of roadway near goaf. In this paper, a theoretical model is established to analyze the rotation
Yunjiang Sun, Daohan Li, Yuhao Feng, Jianan Wang, Shuai Guo, Luyu Wang   +5 more
wiley   +1 more source

On‐Orbit Global Mode Calculation and Characteristic Analysis of Four‐Wing Flexible Satellite

International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.
For a flexible satellite with four solar arrays symmetrically arranged on both sides (referred to as the four‐wing flexible satellite), a solar array dynamic equation is established by incorporating the stiffness matrix of the solar array drive assembly (SADA).
Guowei Jiang, Xiaofan Xu, Rui Zhang, Qi Shi, Yuxin Fang, Zhiguang Song   +5 more
wiley   +1 more source

A Unified Spectro-Geometric-Ritz Method for Vibration Analysis of Open and Closed Shells with Arbitrary Boundary Conditions

Shock and Vibration, 2016
This paper presents free vibration analysis of open and closed shells with arbitrary boundary conditions using a spectro-geometric-Ritz method. In this method, regardless of the boundary conditions, each of the displacement components of open and closed ...
Dongyan Shi, Yunke Zhao, Qingshan Wang, Xiaoyan Teng, Fuzhen Pang   +4 more
doaj   +1 more source

Vibration Analysis of a Pipeline System Based on Model Truncation

Shock and Vibration, Volume 2025, Issue 1, 2025.
Designing a complex pipeline for a floating production storage and offloading (FPSO), particularly over long distances, presents significant challenges in vibration analysis. Traditional modeling methods, which often assume finite lengths and simple configurations, fall short as they do not account for the integrality and locality of long spans and the
Huawei Han, Qiang Fu, Changhui Wang, Yuhai Sun, Changfei Li, Cong Gao   +5 more
wiley   +1 more source

Quasicomparison Functions and Substructure Synthesis for Framed Structures Stability Analysis

Latin American Journal of Solids and Structures
The Rayleigh-Ritz-Meirovitch substructure synthesis method (RRMSSM) is extended to buckling analysis in framed structures. The objective is a computational procedure capable of yielding very accurate critical loads through solution of very-low-order ...
J. I. Colombo, C. A. Morales
doaj   +1 more source

Bending and Deformation of Sandwich Panels Due to Localized Pressure

ITB Journal of Engineering Science, 2005
Bending and deformation of sandwich panels due to localized pressure were analyzed using both Rayleigh-Ritz and finite element methods. The faces were made of laminated composite plates, while the core was a honeycomb material.
Bambang K. Hadi, A. Fajar
doaj  

Free and Forced Vibration Analysis of Airtight Cylindrical Vessels with Doubly Curved Shells of Revolution by Using Jacobi-Ritz Method

Shock and Vibration, 2017
This paper presents free and forced vibration analysis of airtight cylindrical vessels consisting of elliptical, paraboloidal, and cylindrical shells by using Jacobi-Ritz Method.
Fuzhen Pang, Haichao Li, Kwangnam Choe, Dongyan Shi, Kwanghun Kim   +4 more
doaj   +1 more source

An Analysis of Nonlinear Axisymmetric Structural Vibrations of Circular Plates with the Extended Rayleigh–Ritz Method

Mathematics
The nonlinear deformation and vibrations of elastic plates represent a fundamental problem in structural vibration analysis, frequently encountered in engineering applications and classical mathematical studies.
Jie Han, Xianglin Gong, Chencheng Lian, Huimin Jing, Bin Huang, Yangyang Zhang, Ji Wang   +6 more
doaj   +1 more source

AXISYMMETRIC FREE VIBRATION OF THIN PROLATE SPHEROIDAL SHELLS

Journal of Engineering, 2006
In this paper a detailed study of the theory of free axisymmetric vibration of thin isotropic prolate spheroidal shells is presented. The analysis is performed according to Rayleigh – Ritz method. This method as well as an approximate modeling technique
Ahmed A. Hassan, Ala M. Hussein, Mohammed J. Obaid   +2 more
doaj   +1 more source

INFLUENCE OF THE LENGHTS RATIO TO THE STATIC ANSWER IN THE MOVEMENT OF A ROAD DECK [PDF]

Fiabilitate şi Durabilitate, 2017
The article presents a method to obtaining the static response bridge-vehicle system in displacements,and the influence of the lengths ratio of the deck bridge on this response.
Ovidiu GAVRIŞ
doaj