33 results about "Kinematic wave" patented technology

The invention discloses an underground velocity model building method, and belongs to the technical field of oil and gas exploration and development. The process of pre-stack seismic event artificial / semi-automatic pick-up is avoided, and the building process of an underground velocity model is speeded up. The underground velocity model building method comprises the following steps: acquiring a common reflection surface stacking operator; acquiring the kinematic wave field attribute parameters of seismic wave according to the common reflection surface stacking operator; and building an underground velocity model based on a built regularization chromatography equation, the kinematic wave field attribute parameters and a built initial underground velocity model.

The invention discloses a sub-basin confluence simulation method based on a slope channel riverway three-level structure, and relates to the technical field of distributed hydrological model confluence simulation. The method comprises the following steps: extracting a river channel and a channel based on DEM data, and dividing drainage basin grids into slope grids, channel grids and river channelgrids according to categories; calculating the length of a confluence path from each grid to a basin outlet, and counting the number of channels and the average length of the channels according to thetypes of the channel grids; setting the confluence attribute of each grid in the drainage basin according to the riverway or channel grid into which each grid finally converges; and according to thegrid confluence attribute, determining equal-height zone slope, channel and river channel runoff distribution coefficients respectively, and adopting a motion wave equation as a basic simulation formula of slope, channel and river channel confluence to perform confluence simulation on the sub-basins and the equal-height zones. According to the method, the influence of the channel confluence process on water circulation can be considered, and the confluence process simulation effect is improved.

The invention discloses a six-degree-of-freedom water tank navigator suitable for submerged ice-breaking research. The navigator mainly includes three parts: a guide rod movement mechanism, a cam movement mechanism and a waveform monitoring mechanism, wherein the guide rod movement mechanism and the cam movement mechanism The cooperation between the two mechanisms enables the submersible to produce a six-degree-of-freedom combined motion of surge, sway, heave, roll, pitch and yaw. The waveform monitoring mechanism is used to record the bending deformation response of the ice layer excited when the submerged body moves with different combined degrees of freedom. The ice water pool test instrument provided by the present invention can flexibly adjust the motion state of the submersible in the pool according to the experimental research requirements, and then explore the ice-breaking efficiency of the submersible under different motion states, and provide data support for the submersible to break ice and discharge water.

The invention discloses a method for estimating slope surface roughness and sediment erosion rate under rainfall conditions, comprising: first establishing an infiltration model under rainfall conditions to obtain cumulative infiltration during the rainfall process; and then establishing a motion wave equation , combined with the cumulative infiltration, kinetic wave equation and water balance relationship to obtain the slope surface roughness and slope water depth; then establish the sediment transport equation, and determine the sediment erosion rate according to the measured rainfall data and slope water depth. Under a rainfall time, measure the flow rate and sediment volume per unit time at the outlet, and combine the relationship between flow velocity and water depth, as well as the relationship between rain intensity, water depth and sediment yield, to obtain the slope surface roughness and sediment yield. The erosion rate simplifies the parameter acquisition method of the infiltration process and improves the general applicability of the estimation results.

An USRAMS-based optimization design method of a rainwater pipe network belongs to the crossing field of drainage pipe line design and hydraulic models. Aiming at the imperfection of the rational formula method and the requirements of the new version Outdoor Drainage Specifications, the invention is based on rainwater pipe network design data to establish a USRAMS rainwater pipe network hydraulic model; kinematic wave is adopted for simulating calculation; pipe section overload is used as the verification standard according to the model results; the design scheme is optimized according to the model results so that the reliability of rainwater pipe network design is increased. The number of required parameters is less and the parameters are easy to obtain; the runoff coefficient and the water catchment time can be directly obtained; the process of establishing models is simple and quick; the model results are reliable; the applicability of the method is guaranteed; the method has operability; complicated programming is not required; steps can be finished by means of present software; the operation is simple and easy; the feasibility of the invention is guaranteed.

The invention discloses a sub-basin confluence simulation method considering the influence of a silt dam, and relates to the technical field of distributed hydrological model sub-basin confluence simulation. The method includes: adopting a sub-basin contour zone sleeving mode as a model basic calculation unit; dividing the sub-basins into equal-height zones with different numbers according to theelevation based on DEM; and counting relevant parameters, extracting channel grids, setting channel length thresholds, elimiating dummy channels, carrying out generalization on the silt dam in the equal-height zone and carrying out statistics on related parameters of the silt dam; carrying out slope confluence process simulation on each equal-height zone and caryring out confluence process simulation on sub-basin channels by adopting a kinematic wave equation, carrying out regulation and storage correction on channel confluence amount by adopting a silt dam water balance principle, and simulating a riverway confluence process by adopting the kinematic wave equation. According to the method provided by the invention, the influence of silt dam construction in the calculation unit on the confluence process can be simulated.

The invention discloses a method for estimating the surface roughness and soil moisture absorption rate of a slope under rainfall conditions. The movement process of water flow on a slope is described with the help of a kinematic wave equation, the kinematic wave equation is approximately solved by an analytical method to obtain the relation between changes in water flow and depth in different positions of the slope with time, and the surface roughness and soil moisture absorption rate are determined based on the change relation and observed data of rainfall. The method for estimating the surface roughness and soil moisture absorption rate of a slope under rainfall conditions is different from previous measurement methods which cause large error and have limitations. By using the method of the invention, as long as there is data of one rainfall, the volume of runoff at the exit is measured and a water balance equation is established based on a relational expression of changes in water flow and depth in different positions of the slope with time, the surface roughness and soil moisture absorption rate can be determined.

The invention relates to a mixed containing cavity heat dissipation gas wave refrigerating machine, belonging to the field of gas expansion refrigeration low temperature technology, a pressure gas is jetted to a receiving pipe to generate kinematic waves to dissipate energy, thereby realizing refrigeration, the rotating speed is low and the operation is simple. The mixed containing cavity heat dissipation gas wave refrigerating machine is mainly composed of a machine body, a rotating jet flow distributor, a short receiving pipe, a receiving pipe cylinder, a mixed containing cavity and a heat exchanging unit and is characterized in that the end of the short receiving pipe is opened and is communicated with the mixed containing cavity, the heat exchanging unit is arranged in the mixed containing cavity, and the energy of a compression wave or a shock wave, which is transmitted to the mixed containing cavity from the short receiving pipe, is adsorbed by the heat exchanging unit. The heatdissipation and buffer structure that the mixed containing cavity is spliced by the short receiving pipe is adopted in the invention, therefore, the complete machine volume is small, the pipe can notbe broken by vibration, the refrigeration efficiency is high, the changing fluctuation is little, the exhaust of refrigeration gas condensate is very convenient, and the transformed energy is easy tobe recycled. The mixed containing cavity heat dissipation gas wave refrigerating machine can be widely used in the field of condensation separation of mixed gas, light dydrocarbon recycle in petroleum gas, low temperature dehydration of natural gas, low-temperature gas source supply and the like.