Seismic Pallet Rack Stability - FEA Simulation
Budget: €30 – €250 EUR
Important: "Please read the project specifications carefully before submitting an offer. Once you bid on the project, your quoted price is considered final, and no requests for a price increase will be accepted."
If you have any questions before submitting an offer, please contact me!
Project specifications
• Analysis Focus: The analysis must focus exclusively on the global stability of the stacked racks (checking for overturning, sliding, or separation between levels).
• Structural Verification: Component-level structural verification (stress/strain analysis of the rack members) is out of scope.
• Rack Simplification: Since the rack is entirely welded, it can be simulated as a single, rigid steel body. You may simplify the 3D geometry if necessary to optimize mesh and computational time.
• Roll Simulation: Each roll weighs 280 kg and can be modeled as a single rigid body. The roll is simply supported on a steel bar and mechanically locked only in the axial direction (please refer to the attached 3D model). Its geometry can also be simplified.
• Stack Configuration: A typical storage stack consists of 5 racks stacked vertically.
• Rack-to-Rack Interface: As shown in the 3D drawing, the racks are simply resting on top of each other without any mechanical fasteners or interlocking welds.
• Rack-to-Ground Interface: The base rack sits directly on an industrial concrete floor. The friction coefficient between the rack's steel feet and the concrete floor must be assumed based on standard literature and clearly highlighted as a design input in your report.
• Location Coordinates: will be furnished
• Soil Category: Class B (let us know if you require any further geotechnical parameters).
• Analysis Method: The seismic action must be applied via time-history analysis using accelerograms. This is because standard freeware versions of PrePoMax or Mecway do not natively support response spectrum analysis. Note: If you know a reliable workaround to run a response spectrum analysis within these software packages, feel free to use it.
• Accelerogram Selection: In compliance with the Italian Building Code (NTC 2018), you must select and combine a set of 7 spectrum-compatible accelerograms.
• Data Source: You can download the regional spectrum-compatible accelerograms from the ITACA database: https://itaca.mi.ingv.it/ItacaNet_40/#/home
• Tip: If you need a refresher on the exact spectrum-matching and scaling procedure required by NTC 2018, you can use AI tools (like Gemini) to quickly verify the regulatory steps.
• In addition to the summary report, you must deliver the native PrePoMax (.pmx) or Mecway (.liml) file. This is a strict requirement, as we need to retain the ability to autonomously modify or swap the accelerograms in the future if project parameters change.
Following files will be provided:
• Native 3D Models or step models Provided: You will find attached the native 3D CAD models for:
• The individual rack
• The individual roll
• The single-rack assembly (rack + roll)
• The complete stack assembly (the full 5-level stack)
• Main Assembly File: Please note that both layout configurations are built within the same assembly file using assembly configurations:
• Single-Rack Configuration (1 rack + 1 roll)
• Stacked Configuration (the complete 5-level stack)
If you have any questions before submitting an offer, please contact me!
Project specifications
• Analysis Focus: The analysis must focus exclusively on the global stability of the stacked racks (checking for overturning, sliding, or separation between levels).
• Structural Verification: Component-level structural verification (stress/strain analysis of the rack members) is out of scope.
• Rack Simplification: Since the rack is entirely welded, it can be simulated as a single, rigid steel body. You may simplify the 3D geometry if necessary to optimize mesh and computational time.
• Roll Simulation: Each roll weighs 280 kg and can be modeled as a single rigid body. The roll is simply supported on a steel bar and mechanically locked only in the axial direction (please refer to the attached 3D model). Its geometry can also be simplified.
• Stack Configuration: A typical storage stack consists of 5 racks stacked vertically.
• Rack-to-Rack Interface: As shown in the 3D drawing, the racks are simply resting on top of each other without any mechanical fasteners or interlocking welds.
• Rack-to-Ground Interface: The base rack sits directly on an industrial concrete floor. The friction coefficient between the rack's steel feet and the concrete floor must be assumed based on standard literature and clearly highlighted as a design input in your report.
• Location Coordinates: will be furnished
• Soil Category: Class B (let us know if you require any further geotechnical parameters).
• Analysis Method: The seismic action must be applied via time-history analysis using accelerograms. This is because standard freeware versions of PrePoMax or Mecway do not natively support response spectrum analysis. Note: If you know a reliable workaround to run a response spectrum analysis within these software packages, feel free to use it.
• Accelerogram Selection: In compliance with the Italian Building Code (NTC 2018), you must select and combine a set of 7 spectrum-compatible accelerograms.
• Data Source: You can download the regional spectrum-compatible accelerograms from the ITACA database: https://itaca.mi.ingv.it/ItacaNet_40/#/home
• Tip: If you need a refresher on the exact spectrum-matching and scaling procedure required by NTC 2018, you can use AI tools (like Gemini) to quickly verify the regulatory steps.
• In addition to the summary report, you must deliver the native PrePoMax (.pmx) or Mecway (.liml) file. This is a strict requirement, as we need to retain the ability to autonomously modify or swap the accelerograms in the future if project parameters change.
Following files will be provided:
• Native 3D Models or step models Provided: You will find attached the native 3D CAD models for:
• The individual rack
• The individual roll
• The single-rack assembly (rack + roll)
• The complete stack assembly (the full 5-level stack)
• Main Assembly File: Please note that both layout configurations are built within the same assembly file using assembly configurations:
• Single-Rack Configuration (1 rack + 1 roll)
• Stacked Configuration (the complete 5-level stack)