Dynamic Substructuring & Transfer Path Analysis, Volume 4: Proceedings of the 43rd IMAC, A Conference and Exposition on Structural Dynamics, 2025, the fourth volume of twelve from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of the dynamics of coupled structures, including papers on: Linear Joints, Nonlinear Joints and Coupling Modal and Frequency Based Substructuring Round Robin Test Bed on Dynamic Substructuring Transfer Path Analysis and Force Estimation Interface Dynamics

Table of Contents:
1 Modal Vibration Testing of a Frame and Wing Structure Joshua E. Blackham and Matthew S. Allen 2 Toward 3D Experimental Impulse-Based Substructuring Using the Virtual Point Transformation Oliver M. Zobel, Francesco Trainotti, and Daniel J. Rixen 3 A Look at Overfitting in Source Estimation Problems Steven Carter 4 A Numerical Decoupling of a Wing Together with Two Nonlinear Radius-pylons, from the Technical Division’s Substructuring Four-unit Frame Structure A. Linderholt, B. Moldenhauer and D. Roettgen 5 Finite Element Modeling and Substructuring to Simulate Shock Plate Testing Harrison C. Denning, Scott Tuley, Matthew S. Allen, Jeffrey R. Hill, and Daniel R. Roettgen 6 Condition Monitoring for the Mounts of a Simple Supported Beam Using Transfer Path Analysis Michael Kreutz and Daniel J. Rixen 7 Frequency Response Function Expansion using a Symmetry Preserving Gysin Expansion Technique Christopher Page and Peter Avitabile 8 Cutting Force Estimation in Sensor-Equipped Metal Cutting Tools Using Strain-Force Transfer Function Wu Peng, Anders Liljerehn, Martin Magnevall, and Dan O¨ stling 9 Enhanced Mode Selection in Modal Domain Substructuring on the Round Robin Structure Jure Korbar, Miha Pogacˇr, and Gregor Cˇepon 10 Investigation of the Use of Commercial Robotic Arms for Real-Time Hybrid Substructuring Arian Kist, David Stadler, Rok Belˇak, Vasja Plesec, Timi Karner, Gregor Harih and Daniel Rixen 11 Model Initialization in Real Time Hybrid Testing for Experimental Detection of Isolated Branches A. Mario Puhwein and Markus J. Hochrainer 12 Extrapolating Dynamic Transfer Functions from Multi-Input Multi-Output Vibration Testing and Simulation E. J. Perez, E. E. Regula, C. J. Wynn, J. D. Blessinger, J. L. Davis, E. P. Dawson, and S. J. Zimmerman 13 Revisiting the Dual Admittance-Based Quasi-Static Formulation for the Identification of Linear Joint Dynamics with Dynamic Substructuring Francesco Trainotti, M. Brons, S. Klaassen, D. J. Rixen 14 On the Use of Frequency-Dependent Modal Basis for Interface Modeling in Frequency-Based Substructuring Domen Ocepek, Miha Pogacˇr, Jure Korbar, and Gregor Cˇepon 15 Assessing the Importance of Contact Joints Relative to Other Sources of Uncertainty in Dynamic Substructuring Samuel Choi, Manuel Vega, Tyler Alvis, and Teresa Portone 16 High-frequency Dynamic Characterization of Rubber Mounts through an Enhanced Virtual Point Transformation Bart Forrier, Fabio Bianciardi, and Karl Janssens