Ship impact simulation on a rolling lock gate New Lock Terneuzen
Ship impact simulation on a rolling lock gate New Lock Terneuzen
Content • Ingenieursbureau Boorsma – History & general information
• Ship impact simulation – Project New Lock Terneuzen – Ship impact simulation • Workflow & boundary conditions • Analysis • Results – Conclusions on ANSYS Workbench & LS-DYNA ACT 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 3
History & general information • Ingenieursbureau Boorsma BV – In 1969 ir. K. Boorsma settles as an independent consulting engineer
• Present: – Current management: ir. J. Wessels – 50 employees – Offices in Drachten and Amersfoort
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 4
Workfield • Branches – Structural Design & Civil engineering – Environment & Geology
• Disciplines – – – – – –
Infrastructure & Hydraulic Engineering Building Engineering Construction management Timber-frame housing Environmental and Geology advice Building physics
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 5
Hydraulic Engineering & (railway) infrastructure Locks and weirs
Lock at Heumen 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 6
Hydraulic Engineering & (railway) infrastructure HSL-fly-over (Rotterdam)
Metro station Rotterdam Central Station - Randstadrail 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 7
Projectmanagement en Engineering Buildings
New building IKEA Zwolle Special feature: sustainability; solar panels on the roof
Rebuilding IKEA Utrecht Special feature: new sport accommodation for the surrounding city district
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 8
Ship impact simulation on a rolling lock gate New Lock Terneuzen
Blue Roads Europe
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 10
Blue Roads Europe Channel Gent-Terneuzen
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 11
Blue Roads Europe Channel Gent-Terneuzen
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 12
Projectorganisation
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 13
New Lock Terneuzen
Page 14
14-10-2016 | ANSYS ConvergencePagina 15
Assumptions • Shiptype – Mass – Length – Draft – Width – Velocity – Energy
Handysize bulkcarriers (single screw) 35.000 tons 230 m 12,5 m 32 m 2 knots (1,028 m/s)
Due to the water mass that moves along
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 16
Goals of the crash simulation Judgment of: •
Deformations – Can the gate roll back into the chamber after a crash? (The doorway in the concrete lockchamber has a 50 mm tolerance)
•
Force reactions – Will the supporting structures and watertight sealing around the door be damaged? (Damage to parts casted in concrete is not desirable)
•
Dimension of cracks – Will the size of the crack not be too large? (Rolling the gate through running water due to the leakage is limited)
•
Buoyancy tanks (stability & floating capacity) – Will the length of the buoyancy tank that gets damaged exceed the maximum of 9 m? (Minimum length to generate floating capacity enough to roll the gate) 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 17
The Workflow that is used for the finite element simulations
LS-PrePost
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 18
TEKLA Structures model
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 19
ANSYS SPACECLAIM is used for modeling the gate construction geometry
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 20
An STL file of a cargo ship is used for the ship’s bulb and bow geometry
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 21
The Workflow that is used in ANSYS Workbench Geometry
Steel quality defined in the Engineering Data
Mode shapes
Results of the implicit analysis used as a starting point for the explicit analysis
Crash Analysis in LSDYNA ACT Extension
Earth Gravity & Water pressures
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 22
The Finite Element Mesh of the gate and the ship’s bow Gate: elem size between 35 - 450 mm Ship’s bow: elem size between 60 - 1000 mm In Total: 307.148 nodes and 303.645 elements
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 23
Boundary Conditions used in the analysis
Upper roll carriage (UZ)
Horizontal and vertical supports at the gate (UX, ROTY, ROTZ)
Lower roll carriage (UZ) 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 24
Overview of the loads that were taken into account
Ship’s bow is rigid with an initial velocity of 1.03 m/s (2 knots)
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 25
The hydrostatic pressure loads acting on the gate’s damming side
Hydrostatic water pressures at the water retaining sheet
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 26
Three critical situations are analyzed A. Impact of the bulb right in the middle of the gate and the air box • This will result in the largest crack B. Impact of the bulb at an upper in- between baffle of the air box (out of the middle of the gate) • This will result in the largest forces acting on the supporting construction C. Impact of the ship’s bow out of the middle of the gate • This will result in the largest deformations 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 27
Results Postprocessing with LS-PrePost Kinetic Energy, Displacement, Velocity and Acceleration over time
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 28
Displacement Results in [mm]
Resulting displacements for t = 6 s
Resulting displacements for t = 0 s
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Pagina 29
Von Mises Stress Results in [MPa]
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 30
Von Mises Stress Results in [MPa]
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 31
Plastic Strain [-]
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 32
Results: Element Force vectors acting on the damming plate stiffeners
HEB 1000 stiffeners at the water damming plates of the lock gate Force vector plot created in LS-PrePost 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 33
Results: Impact loadcurves for the 3 simulations Impact loading vs Time 35,00
Force Loading [MN]
30,00 25,00 20,00 15,00 10,00
Simulation
A
Simulation
B
Simulation
C
5,00 0,00 0
1
2
3
4
5
6
7
8
Time of the impact [s]
Force-Deflection curve Force loading [MN]
35,00 30,00
25,00 20,00
Simulation
A
15,00
Simulation
B
10,00
Simulation C
5,00 0,00 0,00 0,25 0,50 0,75 1,00 1,25 1,50 1,75 2,00 2,25
Deflection [m] 14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 34
2,50
2,75 3,00 3,25 3,50
Animated Results Animated Results
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 35
Ship impact on a lock gate is not a hypothetical case‌
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 36
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 37
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 38
Some Concluding Remarks… • Workbench LS-DYNA ACT Extension is a great simulation tool for explicit dynamic analyses • Short learning curve for engineers who are already familiar with the Mechanical Interface • Result postprocessing works very easy and smoothly in LS-PrePost, especially the creation of graphs
14-10-2016 | ANSYS Convergence Conference | Ship impact simulation on a rolling lock gate
Page 39
Feel free to contact us for more information: Ir. Anne Jan Breimer Lead Engineer & Project Manager a.j.breimer@boorsma-consultants.nl linkedin.com/in/anne-jan-breimer
Ir. T. Hoekstra Structural Engineer & FEM Specialist t.hoekstra@boorsma-consultants.nl linkedin.com/in/tunishoekstra
A: T: F: E: W: :
Gerben Sondermanstraat 2 9203 PV Drachten +31(0)512 580 300 +31(0)512 525 296 drachten@boorsma-consultants.nl http://www.boorsma-consultants.nl @IB_Boorsma
B.V. Ingenieursbureau Ir. K. Boorsma KvK (Leeuwarden) 01042375