Analysis of response vibration properties and quality changes of 'Huangguan' pears under non-Gaussian vibration

• Published in: Food packaging and shelf life Vol. 50; p. 101560
• Main Authors: Wang, Li-Jun, Xie, Zechen, Gao, Jinguo, Wu, Yumeng, Wang, Zhiwei, Song, Haiyan
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2025
• Subjects: Excitation spectrum; Kurtosis; Non-Gaussian vibration; Quality changes; Response vibration; Non-Gaussian vibration; Excitation spectrum; Kurtosis; Response vibration; Quality changes
• ISSN: 2214-2894; 2214-2894
• DOI: 10.1016/j.fpsl.2025.101560

The ‘Huangguan’ pear (Pyrus bretschneideri Rehd. ‘Huangguan’) is highly susceptible to mechanical damage during postharvest transport. Postharvest transport vibrations typically exhibit non-Gaussian characteristics. This study aimed to investigate the response vibration properties and quality changes of pears subject to white noise and ASTM excitations with varying kurtosis levels (3, 4, 5, and 6). The vibration level and duration were set at 0.7 g and 4 h. Results revealed that excitation kurtosis and spectrum type significantly influenced the pears’ response and subsequent quality changes. Compared to Gaussian vibration, non-Gaussian excitation induced higher response vibration intensity (Grms) and more severe fruit damage. The response Grms and kurtosis of the pears increased as excitation kurtosis increased, which led to more serious damage. Furthermore, the ASTM spectrum generated higher Grms, kurtosis, and fruit damage compared to white noise. Under non-Gaussian (kurtosis = 6), the pear samples exhibited a 50.00 % increase in Grms for ASTM and a 30.11 % increase for white noise compared to Gaussian vibration. In addition, the bottom-layer pears under ASTM excitation showed an 8.78 % higher response kurtosis than those under white noise at the kurtosis 6. Weight loss, respiration intensity, and damage area increased with higher excitation kurtosis, while flesh firmness declined. Soluble solid content (SSC) exhibited variations across different kurtosis levels. These findings highlight the significant influence of excitation kurtosis and spectrum on the response vibration and quality changes of ‘Huangguan’ pears. This study provides valuable references for quality evaluation in laboratory-simulated tests and offers insights into fruit postharvest loss reduction. •Non-gaussian vibration caused more serious pear damage than gaussian vibration.•Response Grms and kurtosis of the pears increased as excitation kurtosis increasing.•Vibration damage of the pears increased as excitation kurtosis increased.•Excitation spectrums had significant effects on the vibration damage of the pears.