Abstract
In this work, an appropriate rail pad is proposed to reduce the vibration induced by moving cranes near the source location in high‐tech buildings. Using a simple two‐degrees‐of‐freedom model and laboratory experiments, we found that a low‐cost rubber pad is effective to reduce crane‐induced vibration. A number of finite element analyses with the full model are then performed for a high‐tech factory and a moving crane. The results show that a decrease in the stiffness of the rail pad can decrease crane‐induced vibration, and it is obvious that the proposed low‐stiffness rubber rail pad with significant damping is an appropriate material to reduce crane‐induced vibration by as much as five dB. In addition, the displacement field using the rubber pad is still much smaller than 2 mm, which is the working requirement for moving cranes.
Highlights
Moving crane-induced vibration is the major source causing harm to the production in high-tech buildings, where the rail pad that connects the rail and building floor may affect the magnitude of vibrations transmitting from the crane to the floor. us, it is important to understand the vibration behavior related to the stiffness and damping effects of such rail pads
(2) When the rail pad is very sti, as shown in Figure 9, the slab vibration is almost independent of the rail pad damping. is condition can be observed in Figure 1, as obtained from the simple two-degreesof-freedom formulation
A simple two-degrees-of-freedom system is used to model the factory slab and the crane rail system, and the result shows that when the sti ness of the rail pad is reduced, an increase in the damping value can e ectively decrease the slab vibration
Summary
Moving crane-induced vibration is the major source causing harm to the production in high-tech buildings, where the rail pad that connects the rail and building floor may affect the magnitude of vibrations transmitting from the crane to the floor. us, it is important to understand the vibration behavior related to the stiffness and damping effects of such rail pads. Wu and ompson used the theoretical models that describe the high-frequency dynamic behavior of railway track to study the effects of the presence of multiple wheels on the rail, and the results showed that the track noise would be overpredicted for the track with soft pads [6]. High-tech buildings often move products using rail-track systems because such systems are efficient and automatic, but vibration induced by moving vehicles will cause problems. There have been many investigations of railway systems to decrease the vibrations induced by moving vehicles, there are rare researches directed toward high-tech buildings. Is study investigates the reduction of moving crane-induced vibration in a high-tech building using an appropriate rail pad. Simple equations and laboratory experiments were performed initially to select a suitable pad material, and complicated finite element models were analyzed to complete the parametric study
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