9results about How to "The calculation process is clear" patented technology

The application discloses a kind of based on fissure expansion's rock slope excavation unloading failure path analysis method, belong to slope stability analysis technical field, including the following steps: S1, fissure equivalent simulation;S2, stress intensity factor calculation and expansion type judgment;S3, fissure cracking judgment;S4, fissure expansion calculation;S5, fissure expansion section generation.The fissure expansion's rock slope excavation unloading failure path analysis method in the application, by the originally complex fissure expansion environment is divided into multiple sub fissure dynamic expansion model, then single sub fissure expansion model is analyzed one by one, then the fissure expansion situation of single sub fissure expansion model is combined with other sub fissure expansion model and is analyzed, such as step by step calculation, obtain the fissure expansion situation of rock slope under overall complex environment, overall calculation logic is clear, avoid complex redundant calculation, improve fissure expansion situation analysis efficiency.

The application discloses a kind of double box girder flow field dynamics modal and flow stability analysis method and system, belong to bridge engineering field.This method first establishes double box girder flow field model by computational fluid dynamics, solves the momentum equation and continuity equation of two-dimensional incompressible flow;Dynamic modal decomposition is carried out again, and eigenvalue, characteristic mode and other information are obtained;Finally, based on linear stability theory, the flow field component is expressed as the sum of steady-state solution and disturbance term, and the global linear flow stability equation is obtained by substituting into the equation, and the flow stability is analyzed by discrete.This method can accurately extract the modal characteristics of each order, providing a scientific basis for wind-induced vibration analysis of double box girder, and has important application value.The method of the application occupies less computing resources, has high numerical accuracy, and can be further expanded to higher precision calculation model according to computing resources, and is suitable for application in actual bridge engineering.

The application provides a tunnel composite stratum excavation induced frictional inclined pile bearing capacity loss calculation method, comprising obtaining tunnel parameters of a shield tunnel, structure parameters of an existing pile foundation and physical and mechanical parameters of a soil body; equivalent conversion of elastic modulus of a multilayer composite soil body into homogeneous single stratum elastic modulus, analysis of a soil body plastic zone and elastic zone range and boundary radius induced by tunnel excavation, establishment of a soil body arbitrary position radial stress and hoop stress distribution model; discrete treatment of an inclined pile along a pile length, discrimination of a stress region according to distances of pile body points to a tunnel center and calculation of corresponding soil body principal stresses, solving of pile soil contact surface normal stress changes through a pile shaft and stress principal direction angle conversion; calculation of pile body point side friction resistance changes according to normal stress changes, integral obtaining of total bearing capacity losses along the pile length and calculation of frictional pile foundation bearing capacity loss factors. The calculation method has high operability, simple calculation and wide application prospects.

The present disclosure provides a calculation method based on the maximum height of catalyst diffusion when the optimal number concentration of ice nuclei in the cloud, comprising establishing a diffusion calculation coordinate system; constructing a wind field model describing the distribution of horizontal wind speed and vertical airflow with height, deriving the lifting trajectory of the center line of the smoke plume with the downwind distance; establishing a concentration distribution analytical model describing the three-dimensional space of the catalyst in the coordinate system; simplifying the concentration distribution analytical model, and solving to obtain the predicted height based on the concentration dilution criterion; based on the vertical airflow velocity distribution model in the wind field model and the preset vertical airflow decay threshold, the critical height based on the limit of dynamic lifting ability is solved; taking the minimum value of the predicted height and the critical height as the maximum height of the catalyst diffusion, the method can comprehensively consider the vertical airflow lifting effect, and the calculation is simple and fast, solving the problems of large prediction deviation caused by ignoring the vertical airflow in the existing model and poor practicability caused by complex calculation.

The present application relates to the technical field of composite materials, and discloses a fabric composite material stiffness matrix calculation method, device, equipment and medium. The method comprises the following steps: obtaining a standard sample of a fabric composite material; determining the in-plane weaving angle alpha and the out-of-plane fluctuation angle beta of the fabric based on the standard sample; obtaining the corresponding basic mechanical parameters of the fabric composite material and the fabric layup parameters of a target component; and constructing a cross-scale numerical calculation model based on the in-plane weaving angle alpha, the out-of-plane fluctuation angle beta, the basic mechanical parameters and the fabric layup parameters, and calculating the complete stiffness matrix of the fabric composite material. The present application is suitable for various single glass fiber or carbon fiber reinforced fabric composite materials, can adjust the structure characteristic measurement points and model parameters according to different fabric types, and has good universality and expandability.

The application belongs to the field of dryland agricultural water-saving technology, and provides a dryland agricultural water-saving equivalent calculation method, which comprises the following steps WP ave S1, calculating the average water productivity of a research area under the condition of the same type of soil and traditional management Y a S2, obtaining the actual crop yield of the research area after the target water-saving technology is used ET a S3, calculating the theoretical evapotranspiration of the crop yield according to the average water productivity and the actual crop yield WP ave S4, calculating the dryland agricultural water-saving equivalent after the water-saving technology is used by subtracting the actual crop evapotranspiration from the theoretical evapotranspiration and performing unit conversion Y a Y a ET Theo ET Theo ET ET a W sav The dryland agricultural water-saving equivalent calculation method provided by the application breaks the technical deficiency that the dryland rain-fed agriculture cannot calculate the physical water-saving amount for the first time, so that the water-saving technology can be converted into an intuitive and physical water-saving equivalent. The application fills the long-term blank of lacking direct water amount index in the field.​​​​​

The application discloses a Monte Carlo-based fuzzy data expansion reliability evaluation method and belongs to the technical field of reliability analysis.The method comprises the following steps: constructing an event failure probability model;establishing an event cumulative distribution function;generating potential event failure trigger time samples of the event through a Monte Carlo random sampling mode based on the event cumulative distribution function, so as to realize simulation of event failure time uncertainty;putting the randomly generated trigger time samples into the corresponding event cumulative distribution function, judging whether the event fails according to a probability hit rule, and thus obtaining failure results of each event in the simulation samples;adopting an earliest trigger principle to determine a primary failure event of the system and system failure time according to the sequence of the event failure time;modeling and analyzing the system failure process according to the distribution characteristics of the system failure time in the simulation process, so as to depict the law of system failure evolution with time;and performing reliability statistical analysis.

The invention discloses a concrete carbon emission calculation and optimization system and method based on a multi-dimensional carbon emission factor database, and relates to the technical field of building material carbon emission calculation and management. Working condition data in the whole concrete production and transportation process are obtained, the carbon emission per unit volume of the concrete is calculated according to a preset calculation process, a result is output, main carbon emission driving factors are identified according to the calculation result, and on the premise that set production constraint conditions are met, the carbon emission driving efficiency is improved. Different parameter combination schemes are generated according to main emission driving factors, and carbon emission corresponding to each scheme is recalculated to obtain an executable scheme with an emission reduction effect, so that a concrete carbon emission management closed loop of data acquisition, emission calculation, contribution degree analysis, parameter recombination and result feedback is constructed. Accurate calculation, dynamic updating and effective management of carbon emission results under different concrete production working conditions are realized.

The application discloses a river network hydrodynamic process simulation method based on branch point water quantity conservation, and specifically comprises the following steps: collecting basic data of each river section and each branch point of a river network; establishing a topological relationship between the branch point and adjacent river sections; discretizing one-dimensional Saint-Venant equations by using a finite volume method, and carrying out grid division on the river network; determining a time step and limiting by using a Runge-Kutta method; calculating an interface flux, and solving water surface slope source terms and friction source terms of each grid unit of an independent river section; calculating water quantity and water level at the branch point based on a water quantity conservation equation according to flux values of adjacent river sections of the branch point; updating the river network calculation grid, and outputting simulation results after simulation time reaches a set total time. The method can simulate complex river network hydrodynamic processes, can accurately simulate complex water flow movement processes of complex river sections, and has a simple and efficient branch point calculation method without iterative calculation.