Vibroengineering Procedia

Vibroengineering Procedia, Vol. 61, 2026, p. 71-78.Marco Civera, Alessio Rubino, Umberto Garlando, Elena BelcoreTree failures, including branch breakage, trunk rupture, and uprooting, pose an ever-growing threat to public safety and the operability of transport infrastructure in both urban and rural environments. Ongoing trends, such as the increasing frequency and intensity of extreme meteorological events, combined with tree ageing and the spread of pathogens, are currently amplifying this risk. In this context, vibration-based inspection (VBI) is emerging as a promising quantitative approach for assessing tree stability and for supporting preventive risk management. This document presents an overview of the problem and briefly summarises dynamic testing and VBI monitoring strategies. Strengths, limitations, and open challenges are critically discussed, highlighting the need for continuous, objective, and scalable monitoring protocols.

Vibroengineering Procedia, Vol. 61, 2026, p. 1-10.Vitaliy Korendiy, Oleh Parashchyn, Oleksandr Kachur, Viktor Lozynskyi, Serhii Hrevtsov, Nataliya HembaraThe paper considers an oscillatory system that consists of an elastically supported working member equipped with a ring gear, a carrier, two planet gears, and an eccentric unbalanced mass. A kinematic model of the planetary mechanism is developed to describe the motion of the excitation point and to determine the conditions under which circular, elliptical, straight-line, and hypotrochoidal trajectories can be generated. On this basis, a dynamic model of the vibratory system is formulated in the form of coupled second-order differential equations for the translational motion of the working member. Particular attention is paid to the synthesis of the geometric and kinematic parameters of the exciter, including the gear ratio, eccentricity, carrier arm length, and initial phase angle. The governing equations are solved numerically for representative parameter sets, and the resulting steady-state trajectories of both the working member and the unbalanced mass are analyzed. The results substantiate the condition that represents a boundary case separating single-frequency trajectories from genuine hypotrochoidal motion. The specific parameters governing the transition from circular to elliptical and rectilinear trajectories and determining the number and shape of the lobes in the hypotrochoidal regime are theoretically justified.

Vibroengineering Procedia, Vol. 61, 2026, p. 151-157.Fengfeng Wang, Jinyu Zhou, Lei LiThis study investigates the mechanical properties and dynamic damage characteristics of CFRP laminates under coupled thermal and impact loads. Through thermal environment simulation, impact loading, and multidimensional data acquisition, experimental data on velocity, acceleration, stress-strain, and energy absorption were obtained. The results show that the heat-impact coupling effect significantly degrades the material’s mechanical performance. This study provides a research foundation for enhancing the structural performance of CFRP under thermal shock, and lays a scientific basis for its engineering application under complex service conditions.

Vibroengineering Procedia, Vol. 61, 2026, p. 172-177.Yongxiang Liu, Cheng Yin, Xiongfeng Gao, Hao PengThis paper studies a large-span low-pier continuous rigid frame bridge using Midas Civil to model a full-bridge simulation. It assesses two force-adjustment measures during construction: permanent counterweights at side-span cantilever ends and reverse thrusting at mid-span free ends. Monitoring data shows good agreement between measured pier forces/displacements and simulations, proving the feasibility of measures in improving the bridge’s force conditions.

Vibroengineering Procedia, Vol. 61, 2026, p. 51-57.Francesco Nigro, Domenico Santaniello, Angelo Lorusso, Francesco Colace, Enzo MartinelliTraditionally, Structural Health Monitoring (SHM) relied on periodic manual inspections and visual assessments, which are inherently limited and subjective in nature, labor-intensive, and unable to detect hidden internal damage. Recently, the integration of the Internet of Things (IoT) has transformed the SHM paradigm by enabling the transition from reactive maintenance to proactive, continuous, and predictive strategies. Indeed, modern IoT systems allow for the deployment of dense, wireless, and cost-effective sensor networks that can capture real-time structural responses and transmit data directly to processing centers. In this context, the present work presents a preliminary application of integrated IoT and SHM techniques for an existing RC structure located in the Campi Flegrei area (near the city of Naples in Italy) that has recently been subjected to several earthquake swarms.