2results about How to "Fully reflected" patented technology

This invention belongs to the field of oil and gas production enhancement and stimulation technology. It provides a FDEM simulation method and system for mineral-scale shale hydration-induced fracturing. The method includes the following steps: obtaining target reservoir stress, rock porosity, and permeability; preparing rock samples from the target stratigraphic layer and obtaining the mineral composition and content through X-ray diffraction experiments; constructing a polycrystalline geometric model of the minerals using random Voronoi mosaic technology; conducting core immersion hydration experiments to obtain the relationship between core water content and time; setting initial and boundary conditions for the model and establishing a numerical model of clay mineral hydration expansion-induced fracturing based on the finite discrete element method; and conducting numerical experiments on shale hydration-induced fracturing to obtain the micro-fracture propagation morphology induced by clay mineral hydration expansion. This invention considers the non-uniform mosaic distribution of multiple minerals in the reservoir rock, simulates the non-uniform stress distribution induced by clay mineral water absorption and expansion, and realizes numerical simulation of the mineral-scale shale hydration-induced fracturing process.

A new energy vehicle permanent magnet synchronous motor stator and rotor collaborative optimization method, comprising: establishing a parameterized finite element model of a permanent magnet synchronous motor, and determining the parameter range of the stator slot structure parameters and the rotor local magnetic circuit structure parameters to be optimized; extracting electromagnetic torque time domain data, phase flux time domain data and air gap magnetic flux space-time distribution data under different parameter combinations respectively; calculating composite torque fluctuation index, weighted counter electromotive force harmonic distortion index, air gap magnetic flux harmonic index and radial electromagnetic force fluctuation index; constructing a multi-source electromagnetic noise proxy objective function; using an improved octopus optimization algorithm oriented to finite element closed-loop simulation, outputting the structure parameter combination that minimizes the multi-source electromagnetic noise proxy objective function and meets the output performance constraints. The present application can solve the problems of single optimization variable, incomplete noise evaluation index and insufficient stability of finite element closed-loop optimization in the prior art.