Technology Category
- Analytics & Modeling - Digital Twin / Simulation
- Networks & Connectivity - RFID
Applicable Industries
- Packaging
- Transportation
Applicable Functions
- Logistics & Transportation
- Product Research & Development
Use Cases
- Intelligent Packaging
- Manufacturing Process Simulation
Services
- System Integration
- Testing & Certification
About The Customer
The Tokyo National Museum (TNM) is the oldest and largest museum in Japan. Founded in 1872, it preserves a range of archaeological objects and artworks from Japan and the surrounding Asian regions. The museum holds over 113,000 assets consisting of multiple pieces; assets include paintings, calligraphy, sculptures, architecture, metalwork, ceramics, and swords, among others. These artifacts often need to be transported between locations, such as the TNM and temples. The museum places great importance on evaluating its shipping process and packaging systems to ensure the safety and preservation of these priceless and irreplaceable items.
The Challenge
The Tokyo National Museum (TNM), founded in 1872, holds over 113,000 cultural assets including paintings, sculptures, ceramics, and more. These priceless artifacts often need to be transported between locations, making their packaging and transportation a serious business. The TNM discovered an unexpected and unacceptable vibration loading to these precious artifacts during transportation. The museum had little control over the vehicle dynamics of the shipping trucks, making it clear that the packaging system design needed to be re-evaluated. The TNM had been using coil spring type “vibration isolators” for shipments of cultural assets. These isolators were positioned at the bottom of a shipping box, which contained the art objects. However, the results from both a random lab test and a trial truck shipment indicated a resonance frequency between 10 Hz to 20 Hz, which was within the truck’s frequency range of excitation (10 Hz to 20 Hz), leading to potential damage to the artifacts.
The Solution
The TNM collaborated with Altair® and consulting firm eXcearch LLC to pinpoint the root cause of the undesired vibration. The team mapped out a simulation-driven investigative approach incorporating both computer-aided engineering (CAE) and physical testing. They created a dummy packaging box with four isolators placed at 0-degree and 45-degree angles and tested two weights, 176 kg and 88 kg. The team mounted tri-axial accelerometers on the bottom of the dummy box and used a “shaker table” in the lab to measure the response of the system for controlled frequency excitations. Based on their physical tests, the team discovered that resonance frequency shifts to a lower range as the input acceleration increases. The team then moved into simulation mode using the results of the physical test. They applied MBD technology commercially developed by Altair. Using MotionSolve® software for mechanical systems simulation, MotionView® for model assembly and HyperView® /HyperGraph® for results visualization, they created a virtual model of the dummy box.
Operational Impact
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