6 results about "Elastic anisotropy" patented technology

The application discloses a kind of terrestrial shale oil cross-scale dynamic stress-strain elastic simulation method and system, the elastic simulation method includes: constructing multiple lamination type digital rock physics model;Simulate dynamic stress-strain value;Characterize the elastic anisotropic response characteristics;Based on the lamination type identification of well logging, seismic data.More accurately simulate the elastic behavior of rock under different scales, and provide an important tool and perspective for cross-scale rock physics research.

The present application belongs to the technical field of material calculation and high-throughput screening, and particularly relates to a kind of ABN2 type silicon nitride sintering aid thermal conductivity prediction screening method. Wherein, the prediction method comprises: obtaining ABN2 type nitride data, screening stable structure according to formation energy threshold value;Adopt "labeled training-unlabeled prediction" phased strategy, utilize graph neural network to fill in the missing B and G;Introduce the improved Slack model based on elastic anisotropy structure correction factor fs Calculation of lattice thermal conductivity κ. The screening method is based on the predicted κ value, and the thermal performance of silicon nitride ceramic is sorted according to the regulation and control requirements of output. The present application designs the correction factor for the strong anisotropic structure characteristics of ABN2 type nitride, significantly improves the prediction accuracy of thermal conductivity, and greatly improves the data coverage by machine learning to fill in the parameters, forming a complete high-throughput screening scheme from parameter filling, thermal conductivity calculation to sintering aid application output.

The invention discloses a material elastic constant array ultrasonic in-situ detection method, and belongs to the technical field of ultrasonic nondestructive testing and material characterization. The method comprises the following steps: carrying out primary orthogonal coding data acquisition on a detected material, determining a refraction point under a preset elastic anisotropy constant C of the detected material based on the Fermat theorem, and carrying out delayed superposition imaging on a reflector in a target area of the detected material by adopting a synthetic aperture focusing or full-focusing algorithm, and calculating the ratio F (C) of the maximum amplitude value of the synthetic image to the entropy value of the image as an evaluation objective function, and obtaining an optimal elastic constant corresponding to the global maximum value of the F (C) by adopting optimization tools such as a genetic algorithm, namely the elastic constant of the detected material. The array ultrasonic device is used for one-time orthogonal coding data acquisition, the detected material and the ultrasonic probe do not need to be moved or rotated for many times, the detection efficiency is improved, the method is not affected by the parallelism and thickness uniformity of the surface interface of the detected material, and in-situ, lossless and rapid detection of the elastic constant of the complex component in a service environment can be achieved.

The invention relates to the field of seismic data processing, in particular to an elastic anisotropic wave field separation method based on a vector pure qP wave equation. In order to solve the problem of qP / qSV wave crosstalk caused by polarization mismatch or scalar approximation under the condition of strong anisotropy in the prior art, the invention provides a novel vector wave field separation method, which specifically comprises the following steps of: performing synchronous forward modeling on a complete elastic wave field and a vector pure qP wave field, and performing vector comparison and elimination processing on the complete elastic wave field and the vector pure qP wave field to obtain a vector wave field; therefore, a high-fidelity and crosstalk-free pure qP wave component and a corresponding residual wave field are obtained. According to the method, high-fidelity longitudinal and transverse wave decoupling with clear physical significance and no pseudo transverse wave interference can be realized without depending on polarization direction estimation.

A connection structure (1) includes: a first structure (10); and a second structure (20) that is detachably connected to the first structure (10), the first structure (10) has a first insertion portion, the second structure (20) has a second insertion portion that is detachably fitted to the first insertion portion, at least one of the first insertion portion and the second insertion portion is a periodic structure having an elastic anisotropy that is different in different directions, when a direction in which the first insertion portion and the second insertion portion are fitted to each other is defined as a first direction and a direction orthogonal to the first direction is defined as a second direction, the elasticity in the second direction of the anisotropic elastic structure is greater than the elasticity in the first direction of the anisotropic elastic structure.

This invention discloses a forward modeling method for seismic elastic waves based on a generalized viscoelastic wave equation. The method includes: determining viscoelastic parameters; establishing a generalized viscoelastic wave constitutive equation containing the viscoelastic parameters, wherein the constitutive equation describes the relationship between stress and strain over time; introducing an Earth medium attenuation factor to transform the constitutive equation into a constitutive relation describing the relationship between the elements of the stress tensor and strain tensor, wherein the coefficients in the constitutive relation contain P-wave and S-wave operators; correcting the P-wave and S-wave operators in the constitutive relation using a correction factor; simultaneously solving the geometric equation describing the geometric relationship of an object during deformation, the equation of motion describing the motion of an object under stress, and the corrected constitutive relation to obtain the wave equation in a viscoelastic anisotropic medium; and obtaining the forward modeling results of seismic elastic waves by solving the wave equation.