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Time-frequency domain hybrid dimension-reduction simulation for fully non-stationary stochastic ground motion field
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Yunmu JIANG1, 2, 5, Zhangjun LIU1, 3, Zixin LIU4, Xinxin RUAN3
Journal of Vibration Engineering | 2025, 38(9) : 1986 - 1994
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Journal of Vibration Engineering | 2025, 38(9): 1986-1994
Time-frequency domain hybrid dimension-reduction simulation for fully non-stationary stochastic ground motion field
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Yunmu JIANG1, 2, 5, Zhangjun LIU1, 3, Zixin LIU4, Xinxin RUAN3
Affiliations
  • 1.State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, China
  • 2.Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, China
  • 3.School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
  • 4.Key Laboratory of Building Collapse Mechanism and Disaster Prevention, Institute of Disaster Prevention, China Earthquake Administration, Sanhe 065201, China
  • 5.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Published: 2025-09-10 doi: 10.16385/j.cnki.issn.1004-4523.202307083
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This study extends the filtered white noise model by proposing a time-frequency hybrid dimensionality reduction model for fully nonstationary seismic ground motion random fields, thereby overcoming the limitation of simulating only ground motion processes without capturing spatially distributed ground motion fields. Specifically, to address the difficulty in directly representing the spatial coherence of seismic random fields within the impulse response function of the filtered white noise model, a proper orthogonal decomposition (POD)-based dimensionality reduction simulation method is introduced. This approach enables a frequency-domain representation of spatially coherent white noise random vector processes. By applying the impulse response functions and modulation functions corresponding to different locations within the seismic random field to filter and modulate the respective white noise components, an efficient time–frequency hybrid dimensionality reduction representation of fully nonstationary seismic random fields is achieved. Numerical examples validate the accuracy and engineering applicability of the proposed model by comparing mean values, standard deviations, auto-/cross-correlation functions, as well as response spectra and coherence functions.

stochastic ground motion field  /  filtering white noise  /  proper orthogonal decomposition  /  time-frequency domain expression  /  dimension-reduction simulation
Yunmu JIANG, Zhangjun LIU, Zixin LIU, Xinxin RUAN. Time-frequency domain hybrid dimension-reduction simulation for fully non-stationary stochastic ground motion field[J]. Journal of Vibration Engineering, 2025 , 38 (9) : 1986 -1994 . DOI: 10.16385/j.cnki.issn.1004-4523.202307083
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.202307083
  • Receive Date：2023-07-31
  • Online Date：2026-02-09
  • Published：2025-09-10
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History
  • Received：2023-07-31
  • Revised：2024-01-03
Funding
Affiliations
    1.State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, China
    2.Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, China
    3.School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
    4.Key Laboratory of Building Collapse Mechanism and Disaster Prevention, Institute of Disaster Prevention, China Earthquake Administration, Sanhe 065201, China
    5.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
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表12种不同金属材料的力学参数
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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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