The Structural Stability Analysis of a Container Crane According to the Boom Shape Using Wind Tunnel Test

2007 ◽  
pp. 365-372
Author(s):  
Seong Wook Lee ◽  
Tae Won Ahn ◽  
Dong Seop Han ◽  
Tae Hyung Kim ◽  
Geun Jo Han
Keyword(s):  
Stability Analysis ◽  
Wind Tunnel ◽  
Structural Stability ◽  
Wind Tunnel Test ◽  
Container Crane

The Structural Stability Analysis of a Container Crane According to the Boom Shape Using Wind Tunnel Test

2007 ◽  
Vol 347 ◽  
pp. 365-372 ◽  
Author(s):  
Seong Wook Lee ◽  
Tae Won Ahn ◽  
Dong Seop Han ◽  
Tae Hyung Kim ◽  
Geun Jo Han
Keyword(s):  
Wind Tunnel ◽  
Structural Stability ◽  
Wind Velocity ◽  
Wind Tunnel Test ◽  
Wind Load ◽  
Wind Resistance ◽  
Container Crane ◽  
Cross Section Area ◽  
Section Area ◽  
Overturning Moment

In this study we carried out to analyze the effect of wind load on the structural stability of a container crane according to the change of the boom shape using wind tunnel test and provided a container crane designer with data which can be used in a wind resistance design of a container crane assuming that a wind load at 75m/s wind velocity is applied on a container crane. Data acquisition conditions for this experiment were established in accordance with the similarity. The scale of a container crane dimension, wind velocity and time were chosen as 1/200, 1/13.3 and 1/15. And this experiment was implemented in an Eiffel type atmospheric boundary-layer wind tunnel with 11.52m2 cross-section area. Each directional drag and overturning moment coefficients were investigated.

scholarly journals The Effect of Rigging Angle on Longitudinal Direction Motion of Parafoil-Type Vehicle: Basic Stability Analysis and Wind Tunnel Test

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Takahiro Moriyoshi ◽  
Kazuhiko Yamada ◽  
Hiroyuki Nishida
Keyword(s):  
Stability Analysis ◽  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Leading Edge ◽  
Longitudinal Direction ◽  
Aerodynamic Characteristics ◽  
Vehicle Stability ◽  
Flexible Wings ◽  
Allowable Range ◽  
Analytical Approaches

The paraglider, a flexible flying vehicle, consists of a parafoil with flexible wings, suspension lines, and a suspended payload. At this time, the suspension lines have several parameters to be designed. Above all, a parameter called Rigging Angle (RA) is sensitive to the aerodynamic characteristics of a paraglider during flight. In this study, the effect of RA is clarified using the two-dimensional stability analysis and a wind tunnel test. The mechanisms about the parafoil-type vehicle stability are clarified through the experimental and analytical approaches as follows. The RA has an allowable range for a stable flight. When the RA is set out of the range, the parafoil cannot fly stably. Furthermore, the behavior of the parafoil wing in the case of lower RA than the allowable range is different from the case of higher RA. The parafoil collapses from the leading edge of the canopy and cannot glide in the case of lower RA.

The Structural Stability Analysis of an Articulation Type Container Crane Using Wind Tunnel Test

2006 ◽  
Vol 326-328 ◽  
pp. 1197-1200 ◽  
Author(s):  
Seong Wook Lee ◽  
Dong Seop Han ◽  
Geun Jo Han
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Wind Load ◽  
Wind Tunnel Testing ◽  
Velocity Data ◽  
Cross Sectional ◽  
Container Crane ◽  
Overturning Moment ◽  
The Stability ◽  
Uplift Forces

This study was carried out to analyze the effect of wind load on the stability of an articulation type container crane using wind tunnel testing. This was done in order to furnish designers with data that can be used in the design of an articulation type container crane that is wind resistant, assuming an applied wind load of 75m/s velocity. Data acquisition conditions for this experiment were established in accordance with similarity. The scale of the articulation type container crane model, wind speed and time were chosen as 1/200, 1/13.3 and 1/15 respectively and this experiment was conducted using an Eiffel type atmospheric boundary-layer wind tunnel with 11.52m2 cross-sectional area. All directional drag and overturning moment coefficients were investigated and uplift forces due to wind load at each supporting point were analyzed.

Reference data on uplift forces for an alarm system to prevent an accident of a container crane due to windblast

2011 ◽  
Vol 225 (6) ◽  
pp. 1373-1380 ◽  
Author(s):  
D S Han ◽  
G J Han
Keyword(s):  
Wind Tunnel ◽  
Wind Direction ◽  
Reference Data ◽  
Interaction Analysis ◽  
Wind Tunnel Test ◽  
Container Terminals ◽  
Alarm System ◽  
Container Crane ◽  
The Stability ◽  
Uplift Forces

This study is conducted to provide the reference data for an alarm system to prevent an overturning of a container crane under wind loads. Two methods, namely FSI (fluid–structure interaction) analysis and wind tunnel test, are adopted in this investigation. In order to evaluate the effect of wind load on the stability of the crane, a 50-ton class container crane, widely used in container terminals, is adopted for an analytic model, and 19 values are considered for wind direction as a design parameter. First, the wind tunnel test for the reduced-scale container crane model is performed according to the wind direction using an Eiffel-type atmospheric boundary-layer wind tunnel. Next, FSI analysis for a full-scale container crane is conducted using ANSYS and CFX. Then, the uplift force obtained from FSI analysis is compared with that yielded by the wind tunnel test. Finally, the reference data on the uplift forces for an alarm system are suggested to prevent an accident of a container crane due to windblast.

Compensation of FSI Analysis to Develop an Alarm System for a Container Crane

2010 ◽  
Vol 452-453 ◽  
pp. 561-564
Author(s):  
Dong Seop Han ◽  
Hyo Pil Jang ◽  
Geun Jo Han
Keyword(s):  
Wind Tunnel ◽  
Wind Direction ◽  
Interaction Analysis ◽  
Wind Tunnel Test ◽  
Container Terminals ◽  
Alarm System ◽  
Container Crane ◽  
The Difference ◽  
The Stability ◽  
Reduced Scale

This study is conducted to provide a compensation formula to design the stowing devices - a tie-down rod and a stowage pin - and an alarm system to prevent an overturning of a container crane under wind loads. Two method, namely FSI(fluid-structure interaction) analysis and wind tunnel test, are adopted in this investigation. In order to evaluate the effect of wind load on the stability of the crane, 50-ton class container crane widely used in container terminals is adopted for analytic model and 19-values are considered for wind direction as design parameter. First, the wind tunnel test for the reduced scale container crane model is performed according to the wind direction using an Eiffel type atmospheric boundary-layer wind tunnel. Next, FSI analysis for a full-scale container crane is conducted using ANSYS and CFX. Then, the uplift force obtained from FSI analysis is compared with that yielded by the wind tunnel test. Finally, a formula is suggested to compensate the difference between the FSI analysis and the wind tunnel test.

scholarly journals Geometrically Nonlinear Aeroelastic Stability Analysis and Wind Tunnel Test Validation of a Very Flexible Wing

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Changchuan Xie ◽  
Yi Liu ◽  
Chao Yang ◽  
J. E. Cooper
Keyword(s):  
Stability Analysis ◽  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Geometrically Nonlinear ◽  
Analysis Model ◽  
Aeroelastic Stability ◽  
Lattice Method ◽  
Flexible Wings ◽  
Structural Dynamic ◽  
Flutter Boundary

VFAs (very flexible aircraft) have begun to attract significant attention because of their good flight performances and significant application potentials; however, they also bring some challenges to researchers due to their unusual lightweight designs and large elastic deformations. A framework for the geometrically nonlinear aeroelastic stability analysis of very flexible wings is constructed in this paper to illustrate the unique aeroelastic characteristics and convenient use of these designs in engineering analysis. The nonlinear aeroelastic analysis model includes the geometrically nonlinear structure finite elements and steady and unsteady nonplanar aerodynamic computations (i.e., the nonplanar vortex lattice method and nonplanar doublet-lattice method). Fully nonlinear methods are used to analyse static aeroelastic features, and linearized structural dynamic equations are established at the structural nonlinear equilibrium state to estimate the stability of the system through the quasimode of the stressed and deformed structure. The exact flutter boundary is searched via an iterative procedure. A wind tunnel test is conducted to validate this theoretical analysis framework, and reasonable agreement is obtained. Both the analysis and test results indicate that the geometric nonlinearity of very flexible wings presents significantly different aeroelastic characteristics under different load cases with large deformations.

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