MODEL CORRELATION PROCEDURES FOR AIR-CONDITIONING COPPER DISCHARGE TUBE

Investigations to perform complete Finite Element (FE) model correlation processes on Copper-Phosphorus multi-bent tubes in outdoor air-conditioning units were studied. This initiative is part of PAPARADMY 1’s development plan in validating its FE models for more advanced CAE analysis to predict transient and random vibration response analysis. The Siemens PLM software’s NX software was used to study the modelling, pre-test planning and correlation processes. Modal test data on the other hand was obtained from impact hammer tests using Bruel Kjaer’s Pulse. Several industrial metrics to evaluate results from each process were also presented to aid in correlation analysis. Both analytical and experimental natural frequencies showed good correlation with percentage error less than 5% for all mode pairs. Results from the Modal Assurance Criterion (MAC) showed reasonable correlation between experimental and numerical mode shapes with the maximum off-diagonal value being 0.3 and 7 highly correlated mode pairs were obtained. The complete workflows developed from this study is showcased in Appendices A, B and C.