Development of hollow ball joints for 3-dimensional space trusses-full scale tests and calibration for numerical analysis

1998 ◽  
Vol 46 (1-3) ◽  
pp. 490-491
Author(s):  
Y Horizono ◽  
Y Yoshikawa ◽  
M Tsuji ◽  
Y Makino ◽  
M Honda ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Dimensional Space ◽  
Full Scale ◽  
3 Dimensional ◽  
Full Scale Tests ◽  
Ball Joints ◽  
Space Trusses ◽  
Hollow Ball

scholarly journals Experimental and numerical analysis of composite steel and concrete trusses

2021 ◽  
Vol 14 (2) ◽  
Author(s):  
Joel Donizete Martins ◽  
Sineval Esteves Pereira Junior ◽  
Ellen Martins Xavier ◽  
Luiz Henrique de Almeida Neiva ◽  
Arlene Maria Cunha Sarmanho
Keyword(s):  
Numerical Analysis ◽  
Experimental Analysis ◽  
Concrete Slab ◽  
Full Scale ◽  
Local Effects ◽  
Analytical Formulation ◽  
Shear Connectors ◽  
Shear Connection ◽  
Full Scale Tests ◽  
Good Agreement

Abstract In the present work, two composite trusses formed by tubular shapes supporting a concrete slab were evaluated. Based on analytical formulation related to the problem, according to recommendations of standards, numerical analyses were performed, with models created using the software Ansys, and an experimental analysis with full-scale tests. Good agreement between the three analysis types was observed. A possible shear connection failure in one truss was observed. With a change in the second truss's connector length, an increase in the structure's strength and rigidity was achieved. In this study, because the shear connectors were directly welded on the upper chord wall, local effects with localized plastifications were evidenced.

Full-Scale Tests and Numerical Analysis of Low-Rise CLT Structures under Lateral Loading

2016 ◽  
Vol 142 (4) ◽  
Author(s):  
Motoi Yasumura ◽  
Kenji Kobayashi ◽  
Minoru Okabe ◽  
Tatsuya Miyake ◽  
Kazuyuki Matsumoto
Keyword(s):  
Numerical Analysis ◽  
Full Scale ◽  
Lateral Loading ◽  
Full Scale Tests

FUNDAMENTAL STUDY ON THE STRENGTH OF BALL JOINTS IN SPACE TRUSSES

1993 ◽  
Vol 452 (0) ◽  
pp. 129-138
Author(s):  
Tsuyoshi TANAKA ◽  
Hiroshi KANATANI ◽  
Mototsugu TABUCHI
Keyword(s):  
Fundamental Study ◽  
Ball Joints ◽  
Space Trusses

Triharmonic Riemannian submersions from 3-dimensional space forms

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tomoya Miura ◽  
Shun Maeta
Keyword(s):  
Existence Theorem ◽  
Space Form ◽  
Dimensional Space ◽  
Riemannian Submersion ◽  
Partial Answer ◽  
Riemannian Submersions ◽  
Space Forms ◽  
3 Dimensional

Abstract We show that any triharmonic Riemannian submersion from a 3-dimensional space form into a surface is harmonic. This is an affirmative partial answer to the submersion version of the generalized Chen conjecture. Moreover, a non-existence theorem for f -biharmonic Riemannian submersions is also presented.

Investigation of planing craft maneuverability using full-scale tests

2021 ◽  
pp. 147509022110303
Author(s):  
Kazem Sadati ◽  
Hamid Zeraatgar ◽  
Aliasghar Moghaddas
Keyword(s):  
Full Scale ◽  
Performance Characteristics ◽  
Forward Speed ◽  
Speed Reduction ◽  
Planing Craft ◽  
Full Scale Tests ◽  
Turning Maneuver

Maneuverability of planing craft is a complicated hydrodynamic subject that needs more studies to comprehend its characteristics. Planing craft drivers follow a common practice for maneuver of the craft that is fundamentally different from ship’s standards. In situ full-scale tests are normally necessary to understand the maneuverability characteristics of planing craft. In this paper, a study has been conducted to illustrate maneuverability characteristics of planing craft by full-scale tests. Accelerating and turning maneuver tests are conducted on two cases at different forward speeds and rudder angles. In each test, dynamic trim, trajectory, speed, roll of the craft are recorded. The tests are performed in planing mode, semi-planing mode, and transition between planing mode to semi-planing mode to study the effects of the craft forward speed and consequently running attitude on the maneuverability. Analysis of the data reveals that the Steady Turning Diameter (STD) of the planing craft may be as large as 40 L, while it rarely goes beyond 5 L for ships. Results also show that a turning maneuver starting at planing mode might end in semi-planing mode. This transition can remarkably improve the performance characteristics of the planing craft’s maneuverability. Therefore, an alternative practice is proposed instead of the classic turning maneuver. In this practice, the craft traveling in the planing mode is transitioned to the semi-planing mode by forward speed reduction first, and then the turning maneuver is executed.

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