Form finding analysis of air cushion of underwater shaking tables

2021 ◽  
Vol 242 ◽  
pp. 110120
Author(s):  
Qinghua Han ◽  
Xiaodong Wen ◽  
Mingjie Liu ◽  
Hao Wu ◽  
Xiangkun Ding
Keyword(s):  
Form Finding ◽  
Air Cushion ◽  
Form Finding Analysis

scholarly journals Form-Finding Analysis of a Class 2 Tensegrity Robot

2019 ◽  
Vol 9 (15) ◽  
pp. 2948
Author(s):  
Carlos G. Manríquez-Padilla ◽  
Oscar A. Zavala-Pérez ◽  
Gerardo I. Pérez-Soto ◽  
Juvenal Rodríguez-Reséndiz ◽  
Karla A. Camarillo-Gómez
Keyword(s):  
Static Analysis ◽  
Analysis Software ◽  
Form Finding ◽  
Element Analysis ◽  
Analysis Methodology ◽  
Geometric Configurations ◽  
The Finite Element Analysis ◽  
Kinematic Position ◽  
New Form ◽  
Form Finding Analysis

In this paper, a new form-finding analysis methodology for a class 2 tensegrity robot is proposed. The methodology consists of two steps: first, the analysis of the possible geometric configurations of the robot is carried out through the results of the kinematic position analysis; and, second, from the static analysis, the equilibrium positions of the robot are found, which represents its workspace. Both kinematics and static analysis are resolved in a closed-form using basic tools of linear algebra instead of the strategies used in literature. Four numerical experiments are presented using the finite element analysis software ANSYS©. Additionally, a comparison between the results of the form-finding analysis methodology proposed and the ANSYS© results is presented.

Form-Finding Analysis of Tensioned Fabric Structures Using Nonlinear Analysis Method

2011 ◽  
Vol 243-249 ◽  
pp. 1429-1434 ◽  
Author(s):  
Hooi Min Yee ◽  
Jae Yeol Kim ◽  
Ong Chong Yong
Keyword(s):  
Nonlinear Analysis ◽  
Minimal Surfaces ◽  
Stress Pattern ◽  
Classical Solutions ◽  
Analysis Method ◽  
Form Finding ◽  
Numerical Examples ◽  
Fabric Structure ◽  
Fabric Structures ◽  
Form Finding Analysis

Nonlinear analysis method is one of the earliest methods proposed for form-finding analysis of tensioned fabric structures. However due to some inherent weaknesses, the method has not been fully developed. In this paper, computational strategies for form-finding analysis of tensioned fabric structure using the nonlinear analysis method has been proposed. For the purpose of verification, form-finding analysis on numerical examples of tensioned fabric structures in the form of minimal surfaces Catenoid, Helicoid, Scherk and Enneper have been carried out. Both the obtained shape and pre-stress pattern have been checked with classical solutions for the above minimal surfaces for verification of the effectiveness of the proposed computational strategies.

Form-finding analysis for a new type of cable–strut tensile structures generated by semi-regular tensegrity

2016 ◽  
Vol 20 (5) ◽  
pp. 772-783 ◽  
Author(s):  
JinYu Lu ◽  
Xiao Dong ◽  
XiLei Zhao ◽  
XiaoLong Wu ◽  
GanPing Shu
Keyword(s):  
Design Method ◽  
Geometric Transformation ◽  
Structural System ◽  
Form Finding ◽  
Practical Applications ◽  
New Type ◽  
Equilibrium Matrix ◽  
Cable Dome ◽  
Value Decomposition ◽  
Form Finding Analysis

A tensegrity structure is a type of self-balancing tensile structure, which consists of tension cables surrounding compression struts. Based on the geometry and topology of the classic half-octahedron tensegrity, this article presents a form-finding analysis of semi-regular tensegrity units using singular value decomposition of the equilibrium matrix. We propose the design formulas for the unit geometric transformation, obtain its internal self-stress modes and inextensional mechanism modes, and verify its geometric stability. Then, we devise a design method and compute the overall feasible self-stress of a tensegrity torus. A novel cable–strut tensile structural system is generated through combining a tensegrity torus and a Levy-type cable dome. Finally, a physical model is constructed to verify the feasibility of this structural system. This work enriches existing forms of tensegrity structures and contributes to further practical applications of tensegrity systems.

Numerical Simulation of Non-Contoured Aerial Cable Tension

2014 ◽  
Vol 919-921 ◽  
pp. 1312-1316
Author(s):  
Zha Wang ◽  
Ji Yao ◽  
Sun Peng
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Nonlinear Finite Element ◽  
Form Finding ◽  
Cable Tension ◽  
Initial Form ◽  
Cable Structure ◽  
Aerial Cable ◽  
Element Theory ◽  
Form Finding Analysis

Since the cable structure has the characteristics that its initial form and initial prestressing are interacted unknown values, the FEM software ANSYS was used in this paper, based on the nonlinear finite element theory, the form-finding analysis steps for aerial cable was established. Then based on these steps, the form-finding analysis for non-contoured aerial cable was carried out, and the safety of the form-finding model under icing conditions was evaluated.

Tensioned Fabric Structures in Oval Form

2013 ◽  
Vol 405-408 ◽  
pp. 1008-1011 ◽  
Author(s):  
Hooi Min Yee ◽  
Jae Yeol Kim ◽  
Mohd Syazwan Mohd Noor
Keyword(s):  
Nonlinear Analysis ◽  
Surface Shape ◽  
Analysis Method ◽  
Form Finding ◽  
Fabric Structure ◽  
Oval Form ◽  
Internal Forces ◽  
Fabric Surface ◽  
Fabric Structures ◽  
Form Finding Analysis

Form-finding of fabric surface bordered by Oval has been investigated. In this study, the possibility of adopting the form of Oval as surface shape for tensioned fabric structure has been studied. The combination of shape and internal forces for the purpose of stiffness and strength is an important feature of fabric surface. For this purpose, form-finding needs to be carried out. Nonlinear analysis method has been used for form-finding analysis of the fabric in the form of Oval.

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