Effects of the Vertical and Horizontal Acceleration on the Seismic Response of Piping Networks

Evaluation of viscous damper on the vibration transmission to the piping system and the support structure exposed to sinusoidal vibration in vertical, horizontal, and lateral directions.

“…The component of the pipe was connected using weld neck flanges in accordance to ASME B16. 5 Standard [11]. The piping system was designed to represent actual configurations of piping system available at the operating plant.…”

“…Whereas external piping vibration phenomenon can occur when the natural frequency of any applied external force is the same or within 20% of to the operating frequency of any equipment connected to the pipe or the natural frequency of the piping system itself [2,4] The task determining the root cause of piping vibrations is typically challenging due to piping system in industrial facilities such as power plant and chemical facilities are complex in configurations and have been connected to multiple routing that can lead to various excitations and loads on the piping system. This includes dynamic loads such as reciprocating equipment and fluid behaviours which plays an important role in affecting piping vibration [1,5] An example of piping vibration occurring due to normal operation in industrial facilities can be seen in the case of the Loviisa power plant, the first nuclear power plant in Finland [6]. Excessive vibration in the piping system was observed when the electric power production was increased by 10%.…”