Study on influencing factors of the natural frequency of accumulator structures
HU Kongsheng
ZHANG Jun
YANG Song
WANG Haijun
MAO Kaizhi
Abstract：To address the noise issue caused by resonance excitation of the natural frequency in accumulator structures,investigates the influencing factors of natural frequency in accumulator structures.Based on single-degree-of-freedom system theoretical analysis,the natural frequency is primarily determined by the structural"stiffness"and"mass".A finite element numerical simulation model was established with less than 5％error between theoretical calculations and experimental measurements.Characteristic dimension sensitivity analysis reveals that bracket feature dimensions primarily affect the upper natural frequency:increasing bracket thickness,width and height enhances bracket stiffness and raises the upper natural frequency,with sensitivity ranking:bracket thickness＞bracket width＞bracket height.Bend and cylinder wall thickness dimensions mainly influence the lower natural frequency:increasing bend wall thickness,reducing bend length and thinning cylinder wall thickness improve bend stiffness and reduce cylinder mass,thereby increasing the lower natural frequency,with sensitivity ranking:bend wall thickness＞bend length＞cylinder wall thickness.In a practical case study with largely finalized product structure,thickening the bend wall thickness—a minimal structural modification—effectively adjusted the natural frequency and resolved the accumulator noise issue.
Keywords：AccumulatorNatural frequencyMassStiffnessFinite element method
Publication Date：2025-12-09
Online Publishing Date：2026-01-06(First online date of this platform, not the publication date of the document)
Pages：4( 55-58 )