Multi-objective Structural Optimization Design of Loader Cab Based on Acoustic-structural Coupling#br#

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (7) : 46-50.

The models of a loader cab and its acoustic cavity were built to compose an acoustic-structural coupling model which was verified by SIMO mode test, and the excited force of the suspension points was measured, then the frequency response analysis and the prediction of the cab interior noise were proceeded. The critical optimization frequencies were determined according to the coupling mode and the sound pressure level curve, and the static analysis was made under the typical condition of the cab working. The combination of the compromise programming approach and the average frequency method was applied to the multi-objective topography optimization of the cab by merging the static stiffness and several critical dynamic frequencies as Euclidean distance’s multi-objective function. The result shows that the application of the method in the cab optimization can improve the static stiffness and the critical frequencies synthetically, avoiding the frequency of oscillation phenomenon and getting the Pareto solution of the optimal objectives, and the overall sound pressure level is dropped by 3.03dB.

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Abstract

The models of a loader cab and its acoustic cavity were built to compose an acoustic-structural coupling model which was verified by SIMO mode test, and the excited force of the suspension points was measured, then the frequency response analysis and the prediction of the cab interior noise were proceeded. The critical optimization frequencies were determined according to the coupling mode and the sound pressure level curve, and the static analysis was made under the typical condition of the cab working. The combination of the compromise programming approach and the average frequency method was applied to the multi-objective topography optimization of the cab by merging the static stiffness and several critical dynamic frequencies as Euclidean distance’s multi-objective function. The result shows that the application of the method in the cab optimization can improve the static stiffness and the critical frequencies synthetically, avoiding the frequency of oscillation phenomenon and getting the Pareto solution of the optimal objectives, and the overall sound pressure level is dropped by 3.03dB.

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acoustic-structural coupling / compromise programming approach / average frequency method / multi-objective topography optimization / low noise

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ZHANG Jun-hong, LI Zhong-peng, BI Feng-rong, WANG Jian, ZHU Chuan-feng. Multi-objective Structural Optimization Design of Loader Cab Based on Acoustic-structural Coupling#br#[J]. Journal of Vibration and Shock, 2015, 34(7): 46-50

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