How is the non-uniform pulse force calculated and set?
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I would like to use CaesarII software to analyze the vibration issues in the outlet pipeline of a screw pump. During normal operation, uneven pulsating forces exist in the pump outlet pipeline (bubbles are present in the pump’s suction line, and uneven pulsating forces occur in the outlet pipeline after it passes through the pump). Fixed clamps have now been installed in the outlet pipeline to reduce pipeline vibration. The purpose of using software analysis is to determine whether the pipeline stress exceeds limits and whether the pipeline layout can be optimized. But at present, I don’t know how to set the forces in the pipeline; I’d appreciate your advice! Thank you so much!
Two approaches: 1: First, perform a Fourier transform on the force curve for each point. Then, they are entered into the software separately (since the software can only calculate one frequency, several models need to be copied). Then the results are manually merged. 2: Perform time-history analysis on the curve of each force. In this way, there is no issue with performing calculations in stages.
Time-history analysis should be used, but can you obtain accurate data for non-uniform pulse forces? If the deviation in the data is too large, time-history analysis is meaningless.