Pipeline vibration reduction design method based on viscous damping and particle damping coupling

Abstract

The invention discloses a viscous damping and particle damping coupling-based pipeline vibration reduction design method, which comprises the following steps of: carrying out vibration test on a to-be-optimized pipeline, extracting vibration frequency characteristics, establishing a discrete element-finite element coupling analysis model, and calculating the vibration of the to-be-optimized pipeline; vibration damping frequency bands corresponding to the viscous damping vibration damper and the particle damping vibration damper are matched, and various configuration parameters of the vibration damping vibration damper are determined; and performing static analysis mode calculation on the optimized new pipeline to obtain a new pipeline model and a stress distribution diagram of the new pipeline model, and comparing a stress maximum value in the stress distribution diagram with a fatigue limit value of the pipeline to enable the stress maximum value of the new pipeline model to be smaller than the fatigue limit value of the pipeline. According to the method, the vibration reduction characteristics of the viscous damping vibration absorber and the particle damping vibration absorber are utilized, the viscous damping vibration absorber and the particle damping vibration absorber are matched with the discrete element-finite element coupling analysis model of the to-be-optimized pipeline, vibration reduction and noise reduction can be conducted on all vibration frequency bands of the pipeline in a targeted mode, vibration control over the whole frequency band of the pipeline is achieved, and the vibration reduction and noise reduction effect is good.

Description

technical field [0001] The invention relates to the technical field of pipeline vibration reduction, in particular to a pipeline vibration reduction design method based on the coupling of viscous damping and particle damping. Background technique [0002] Pipeline vibration is a common phenomenon in the petrochemical industry. Various reasons such as the opening and closing of valves in the pipeline, the transportation of fluid in the pipeline, and the vibration transmission of machinery will cause pipeline vibration. There are many hazards in pipeline vibration. Severe vibration can even cause fatigue failure of pipeline structure, lead to structural damage of pipeline, cause pipeline rupture, and cause serious safety accidents such as container rupture and explosion. Therefore, the problem of pipeline vibration reduction has attracted much attention. [0003] The vibration of the pipeline is a relatively complex systematic problem. The pipeline is equipped with special str...

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Problems solved by technology

[0003] The vibration of the pipeline is a relatively complex systematic problem. The pipeline is equipped with special structures such as valves, tees, and elbows. The vibration characteristics and causes of vibration are different at different positions on the pipeline, and its frequency components are relatively complicated. All pipeline dampers have limitations in their damping frequency bands

For example, the viscous damping damper is a velocity-type damper, which has a good damping effect on low-frequency vibrations, but has a poor damping effect on high-frequency vibrations. For example, a particle damping damper is an acceleration-type damper. The vibration reduction effect of low frequency vibration below 100Hz is not obvious, but the vibration reduction effect of high frequency above 100Hz is very obvious

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