一种粘弹性参数反演方法及相关设备
By combining the time-of-flight method and two-dimensional fast Fourier transform, and utilizing the phase velocity anchor point under the zero-frequency limit condition and the phase velocity dispersion curve in the mid-to-high frequency band, the problem of insufficient rheological model constraints in the viscoelastic parameter inversion of existing technologies is solved, and high stability and high accuracy inversion of viscoelastic parameters are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XI AN JIAOTONG UNIV
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-17
AI Technical Summary
In existing viscoelastic parameter inversion methods, the lack of low-frequency information leads to insufficient constraints on the rheological model by the phase velocity dispersion curve in the mid-to-high frequency range, resulting in severe parameter coupling, insufficient inversion stability, and low accuracy of viscoelastic parameter inversion.
The time-of-flight method was used to extract the shear wave group velocity and it was equivalent to the phase velocity anchor point under the zero-frequency limit condition. The two-dimensional fast Fourier transform was combined to extract the phase velocity dispersion curve in the mid-to-high frequency band. The rheological model was constrained based on the static shear modulus, and the viscosity coefficient was fitted by a single parameter.
By introducing constraint information from low-frequency responses, the degree of parameter coupling is reduced, and the stability and accuracy of viscoelastic parameter inversion are improved, thus solving the problem of insufficient constraints in rheological models.
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Figure CN122115451B_ABST