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Random vibration analysis of vehicle systems with uncertain parameters under the action of road roughness
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Chenyang MAO1, 2, Yan ZHAO1, 2, 3, Fan LIU2, 4, 5
Journal of Vibration Engineering | 2025, 38(9) : 1967 - 1976
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Journal of Vibration Engineering | 2025, 38(9): 1967-1976
Random vibration analysis of vehicle systems with uncertain parameters under the action of road roughness
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Chenyang MAO1, 2, Yan ZHAO1, 2, 3, Fan LIU2, 4, 5
Affiliations
  • 1.School of Mechanics and Aerospace Engineering, Dalian University of Technology, Dalian 116023, China
  • 2.State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Dalian 116023, China
  • 3.Ningbo Research Institute, Dalian University of Technology, Ningbo 315016, China
  • 4.School of Civil Engineering, Central South University of Forestry and Technology, Changsha 410004, China
  • 5.Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha 410004, China
Published: 2025-09-10 doi: 10.16385/j.cnki.issn.1004-4523.202307022
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A polynomial dimensional decomposition pseudo-excitation method (PDD-PEM) was established in the frequency domain to quantify the uncertainty of random vibration power spectrum density for vehicles with uncertain parameters under random road excitation. Transforming stationary random vibration analysis into harmonic load analysis through pseudo-excitation method, and transforming double random problems into single random problems; At the same time, the polynomial dimensional decomposition method is used to construct a random Surrogate model, and the explicit function of the power spectrum density response expressed by the polynomial basis is given, which effectively realizes the probabilistic evaluation of the structural response in the uncertain parameter space. In numerical examples, the method established in this paper was used to analyze the random vibration of vehicle systems with uncertain parameters under road roughness. Compared with the Monte Carlo method, the correctness and effectiveness of the established method were verified, and the influence of uncertain parameters on the structural response statistical characteristics was further discussed. These works laid a certain foundation for considering the optimization and control problems of vehicle system parameters with uncertainty.

uncertainty quantification  /  vehicle dynamics  /  random vibration  /  polynomial dimension decomposition  /  pseudo-excitation method
Chenyang MAO, Yan ZHAO, Fan LIU. Random vibration analysis of vehicle systems with uncertain parameters under the action of road roughness[J]. Journal of Vibration Engineering, 2025 , 38 (9) : 1967 -1976 . DOI: 10.16385/j.cnki.issn.1004-4523.202307022
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doi: 10.16385/j.cnki.issn.1004-4523.202307022
  • Receive Date：2023-07-07
  • Online Date：2026-02-09
  • Published：2025-09-10
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  • Received：2023-07-07
  • Revised：2023-10-02
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Affiliations
    1.School of Mechanics and Aerospace Engineering, Dalian University of Technology, Dalian 116023, China
    2.State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Dalian 116023, China
    3.Ningbo Research Institute, Dalian University of Technology, Ningbo 315016, China
    4.School of Civil Engineering, Central South University of Forestry and Technology, Changsha 410004, China
    5.Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha 410004, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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