Abstract
By Michael Victor Caldwell, Mr., GCI (respectallamericans@gmail.com)
Abstract Hybrid Vortex-Resonant Seismic Isolation Module is a structural isolation device that integrates non-linear fluid viscous damping (FVD, F=Cv^α with α≈0.3–0.5), inerter-based tuned mass damping (TMDI), and gyroscopic stabilization within a single module. Arachne-patterned micro-channels (proprietary flow geometry) stabilize high-viscosity MR fluid into controlled vortex paths, converting lateral seismic shear into rotational momentum while preventing cavitation.
Key features: - Dual counter-rotating masses (CRM) provide 10–50x inertia amplification and broadband tuning (0.5–5 Hz). - Self-centering via gravity and viscous overflow; optional low-power piezo reset. - Housing uses high-strength alloys suitable for 121°C autoclaving.
Performance targets (aligned with ASCE 7/Eurocode spectra): - Floor acceleration reduction: 50–75% (vs. 30–50% conventional BIS+TMD). - Base displacement control: 60–80% (vs. 40–60%). - Damping efficiency: 90–95% per cycle (non-linear FVD).
This module extends base-isolated structure (BIS) performance via TMDI principles while reducing maintenance via closed mechanical design. Numerical validation proposed using 2-DOF models; shake-table testing roadmap provided.
GCI ecosystem integration: - Arachne substrate (#11/#23): Cavitation-free fluid paths. - Sanitized Block alloys (#5/#7): Durable housing. - Resonant tuning (#24): Frequency matching.
License: CERN-OHL-P v2.0 (permissive open hardware). Open-concept declaration: Part of online-only GCI series by Michael Victor Caldwell—no commercial intent asserted. Prior-art for seismic engineering research and development.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Caldwell, Michael Victor Mr., "Hybrid Vortex-Resonant Seismic Isolation Module", Technical Disclosure Commons, (March 02, 2026)
https://www.tdcommons.org/dpubs_series/9435