33results about How to "Long test cycle" patented technology

The invention discloses a testing method for a design allowable value of a composite material opening pore comprehensive strength. The testing method for the design allowable value of the composite material opening pore comprehensive strength comprises the steps of 1, obtaining basic values of impact factors of technology batch, hygrothermal environment, thickness, diameter of opening pore, ratio of breadth to diameter, pore countersunk head and the opening pore compressive strength of the composite material through a cordwood system testing component and testing stage; 2, obtaining the design allowable value of the composite material opening pore comprehensive strength through a formula and the obtained data in the step 1. The adoption of the testing method for the design allowable value of the composite material opening pore comprehensive strength can solve problems in engineering practices that the obtained design allowable value of the composite material opening pore comprehensive strength through a traditional testing method has a large deviation, the quantity of testing articles is large, the cycle of testing is long, and the testing result is influenced greatly by constraint conditions such as size effect, boundary conditions and load distribution.

The invention provides a method for optimizing the test cycle of a nuclear power plant containment vessel. The method comprises the following steps: S1. judging whether the history situation of CTT cycle of the test of the nuclear power plant containment vessel is qualified, if so, entering S2, otherwise, judging that the CTT cycle is not suitable for being prolonged; S2. judging whether the nuclear power plant containment vessel is checked to be qualified or not, if so, entering S3., otherwise, correcting; and S3. evaluating the risk after prolonging the CTT cycle of the power plant, judgingwhether the risk evaluation is passed, if so, determining to prolong the CTT cycle, otherwise, judging that the CTT cycle is not suitable fo being prolonged. By utilizing the method, the CTT test cycle can be prolonged, the CTT frequency can be reduced, the CTT risk can be efficiently reduced, overhaul of critical paths can be saved within the service life of a nuclear power unit, at least 120,000,000 degrees power can be generated by thousands and millions of units; at least ten days of overhaul critical path can be saved after the service life of the nuclear power plant is prolonged, 240,000,000 degrees power can be generated by thousands and millions of units, and the economic benefits can be obviously increased.

The invention discloses a manual icing testing system based on natural condition. The manual icing testing system comprises a measuring system, wherein the measuring system comprises a testing field, a wire rod system and a spraying system; the wire rod system is erected on the testing field; the wire rod system comprises concrete rods arranged in parallel; two layers of leads in parallel are erected up and down are erected on each row of concrete rods; two leads are arranged at each layer; the leads and the concrete rods are connected through insulators; the spraying system comprises a spraying pipeline; the spraying pipeline is parallel to the leads at the upper layer; and the spraying pipeline is provided with nozzles facing downwards. With the adoption of the manual icing testing system based on natural condition, related by the invention, the natural environment condition can be utilized well; the advantages of the natural condition and the natural environment condition can be combined; the defect that testing is carried out only depending on the natural condition is made up; the manual interference is carried out pointedly; the testing time (period) is prolonged; and ideal parameters of the testing environment can be obtained.

The present invention provides a method and a device for compressing non-constant amplitude domain data. The method determines whether a small load event is in an ascending load event or a descending load event in the rain flow counting statistics. If the small load event is a small load event in the ascending load event and the small load event is smaller than a minimum stress range, a half cycle of the period in which the small load event is counted in the rain flow counting statistics is removed. If the small load event is a light load event in the descending load event and the product of the small load event and the empirical parameter is less than the minimum stress range, a half cycle of the period in which the small load event is counted in the rain flow counting statistics is removed. The non-constant amplitude data compression of different load events is realized. Under the premise of fatigue damage equivalence, the compression efficiency is improved and the test period is shortened.

The invention discloses a device for measuring actual triaxial creep of a geotechnical engineering test specimen. The device comprises a support structure, and also comprises four confining pressure plates, an upper compression plate and a lower compression plate so as to form a closed cavity for wrapping a test specimen, wherein the confining pressure plates comprise two long confining pressure plates and two short confining pressure plats, the upper compression plate and the lower compression plate are a rectangular top steel plate and a rectangular bottom steel plate, the two outwards-bent L-shaped long confining pressure plates are overlapped on two adjacent side surfaces of the bottom steel plate, the two outwards-bent L-shaped short confining pressure plates are overlapped on the other two side surfaces of the bottom steel plate, the bottom ends of the short of the bottom steel plate plates are arranged on the bottom steel plate, the top steel plate is overlapped at the top ends of the long confining pressure plates, the top steel plate is clung to the inner side surfaces of the two short confining pressure plates, pressure sensors corresponding to the four confining pressure plates and the upper compression plate and the lower compression plate are vertically arranged inside the support structure, and grating rulers are arranged on the pressure sensors. The invention also provides a method for measuring the actual triaxial creep of the geotechnical engineering test specimen by using the device.

The invention provides a method for testing the surface pollution pressure resistance of an insulator coated with an anti-pollution flashover coating. The nozzle is used for uniformly and dispersedlyspraying solid powdery dirt into the dirt accumulation environment box by utilizing negative pressure generated by compressed air; solid powdery dirt is adsorbed to the outer surface of the anti-pollution flashover coating by utilizing the adsorption effect of high-voltage direct current; in order to ensure that the dirt amount on the outer surface of the anti-pollution flashover coating is uniform, the polarity of the high-voltage direct current is changed once on the high-voltage side at certain intervals, the polarity is frequently changed, and the problems that the surface of the hydrophobic and super-hydrophobic anti-pollution flashover coating with low surface energy is difficult to contaminate and even cannot be contaminated are solved; solid powdery dirt is prepared by adopting a method of firstly wet-mixing uniformly and then dehydrating and drying, so that the dirt is finer and smoother, and the dirt can be conveniently sprayed out in a mist form; the solid powdery dirt is prefabricated and formed by drying and dewatering in advance, so that the time required for drying the dirt liquid in the traditional test method is avoided; and the pretreatment step of coating the diatomite in the traditional method is abandoned.

The present invention relates to a kind of dynamic monitoring method of aircraft structure fatigue test measurement data, it is characterized in that, comprises the following steps: Step 1, carry out static strain displacement measurement; Step 2, establish static strain displacement measurement basic data template; Step 3, Carry out fatigue strain displacement measurement; step 4, establish a basic data template for fatigue strain displacement measurement; step 5, conduct a formal fatigue test and perform static error calculation and judgment; step 6, conduct a formal fatigue test and perform fatigue error calculation and judgment. The theoretical basis used in the invention is correct, the implementation steps are clear and simple, the computer is easy to control and implement, and the engineering concept is clear. The proposal of the invention solves the problem that it is difficult to determine whether the test runs normally in the aircraft structure fatigue test.

The present invention provides a method and a device for compressing non-constant amplitude domain data. The method determines whether a small load event is in an ascending load event or a descending load event in the rain flow counting statistics. If the small load event is a small load event in the ascending load event and the small load event is smaller than a minimum stress range, a half cycle of the period in which the small load event is counted in the rain flow counting statistics is removed. If the small load event is a light load event in the descending load event and the product of the small load event and the empirical parameter is less than the minimum stress range, a half cycle of the period in which the small load event is counted in the rain flow counting statistics is removed. The non-constant amplitude data compression of different load events is realized. Under the premise of fatigue damage equivalence, the compression efficiency is improved and the test period is shortened.

The invention provides a method for optimizing the test cycle of a nuclear power plant containment vessel. The method comprises the following steps: S1. judging whether the history situation of CTT cycle of the test of the nuclear power plant containment vessel is qualified, if so, entering S2, otherwise, judging that the CTT cycle is not suitable for being prolonged; S2. judging whether the nuclear power plant containment vessel is checked to be qualified or not, if so, entering S3., otherwise, correcting; and S3. evaluating the risk after prolonging the CTT cycle of the power plant, judgingwhether the risk evaluation is passed, if so, determining to prolong the CTT cycle, otherwise, judging that the CTT cycle is not suitable fo being prolonged. By utilizing the method, the CTT test cycle can be prolonged, the CTT frequency can be reduced, the CTT risk can be efficiently reduced, overhaul of critical paths can be saved within the service life of a nuclear power unit, at least 120,000,000 degrees power can be generated by thousands and millions of units; at least ten days of overhaul critical path can be saved after the service life of the nuclear power plant is prolonged, 240,000,000 degrees power can be generated by thousands and millions of units, and the economic benefits can be obviously increased.

A method for determining the loading frequency of an aircraft structure fatigue test is characterized in that it comprises the following steps: Step 1, performing static strain measurement under each peak and trough load; Step 2, calculating the static measurement strain average value; Step 3 , Carry out the fatigue spectrum strain measurement; Step 4, calculate the relative error η between the fatigue spectrum strain measurement value and the static measurement strain average value k , judging η k Whether the theoretical basis used in the present invention is correct, the implementation steps are clear and simple, and the engineering concept is clear. The invention solves the problem that the fatigue loading frequency is not easy to determine in the aircraft structure fatigue test.

The invention belongs to the technical field of deep water environment explosion simulation tests. The invention particularly relates to an explosive shock wave pressure testing device for simulating a deepwater free field environment. The invention designs a pressure testing device for simulating explosion shock waves in a deepwater free field environment. A piston type closed tank is pressurized by utilizing repulsive force between magnets. The device is composed of a piston type closed tank, a pressurization system, a shock wave pressure testing system and a water injection and drainage system. According to the technical scheme, the positions and the number of sensors are selected according to the test purpose, water is injected through a water injection and drainage system, a pressurization system is energized to give magnetic force for pressurization, waste water is discharged after the test is completed, and test data are exported. The electromagnetic effect is used for pressurization, compared with a traditional deepwater explosion testing device, the device has the advantages of being environmentally friendly, efficient, short in experimental period, simple in system design and low in device cost, and a new thought can be provided for follow-up research.

The invention discloses a method for measuring a derivative of aircraft longitudinal moment on pitching angular velocity. The method comprises the following steps: firstly constructing a testing wind tunnel, wherein the testing wind tunnel comprises a wind tunnel inlet, a wind tunnel pipeline and a rectifying blade; then horizontally and fixedly arranging an aircraft model in the wind tunnel pipeline through a supporting frame and arranging a data measuring instrument at the connection portion of the aircraft model and the supporting fame; secondly, rotating the testing wind tunnel at a constant speed at the angular velocity q1, measuring the longitudinal moment (img file='DDA0000593412430000011.TIF' wi='96' he='53' / ) of the aircraft model at the moment; successively, rotating the testing wind tunnel at a constant speed at the angular velocity q2 and measuring the longitudinal moment (img file='DDA0000593412430000012.TIF' wi='93' he='52' / ) of the aircraft model at the moment; finally, calculating the derivative of the aircraft longitudinal moment on the pitching angular velocity according to the q1 and the q2 as well as (img file='DDA0000593412430000013.TIF' wi='204' he='55' / ). The method has the benefit that the derivative of aircraft dynamic torque on pitching angular velocity can be directly measured through the wind tunnel test, so that the test period, the test expense and the test complexity are effectively reduced.

The present invention relates to a system for evaluating the environmental stress cracking resistance of a polyethylene resin, wherein the system comprises the aqueous solution of a nonionic surfactant and an anionic surfactant, and further has the following advantages that 1) the electrostatic stability of the mixed surfactant is improved to make the active agent molecular chain easily form micelles so as to provide a synergistic effect and substantially improve the efficiency of the surfactant; and 2) the surfactant component cannot release nonylphenol and other components toxic and harmful for human body during the use process, such that the advantages of safety and environmental protection are provided.

The invention discloses a multi-physics coupling field calculation method of a reflector antenna, relates to the technical field of reflector antenna analysis, and aims to provide a calculation method with high precision, no conversion error and strong practicability. The present invention mainly includes the following processes: establish models and assign values ​​in the fluid field and temperature field respectively, enter the solid field analysis after format conversion, obtain surface precision under different working conditions, and then perform surface precision synthesis; deformed reflective surface and The results of the feed vector are superimposed, imported into the high-frequency electromagnetic EDA software, and the boundary of the reflective surface is determined, and the data points of the reflective surface are interpolated to form a continuous reflective surface, and the calculation parameters are set. After calculation, the final electromagnetic result. The invention effectively integrates multi-field coupling analysis, and is especially suitable for the design, index budget and strength check of various reflector antennas.

The invention discloses a mildew-proof identification swab as well as a preparation method, a use method and application thereof, and belongs to the technical field of efficacy evaluation. The mildewproof identification swab is prepared by taking milk rich in animal protein or soymilk rich in plant protein as a bacterial carrier and a bacterial carrier supporting material polypropylene non-woven fabric, uniformly mixing the bacterial carrier raw material and water at 40-60 DEG C according to a mass ratio of 1: (6-8) in a clean environment at room temperature, cooling to room temperature, and packaging to obtain the mildewproof identification swab. And uniformly spraying the mixture which is 1.25 times of the weight of the bacterial carrier supporting material on the surface of the bacterial carrier supporting material until the mixture is completely absorbed. After a sample to be detected is in full contact with the mildew-proof identification swab, the sample is subjected to sealed contact culture for 72 hours under the conditions of constant temperature, constant humidity and illumination, and the mildew-proof effect of the sample to be detected is subjected to sensory evaluation. Compared with a traditional mildew-proof test, the mildew-proof identification swab for evaluating the mildew-proof effect has the advantages of being short in period, high in timeliness, visual in result, wide in application, easy to operate and low in cost.

The invention belongs to the technical field of electronic parking of passenger cars, and specifically relates to a simulation and testing method of a functional mode of an electronic parking system. This method uses a rapid prototyping system to replace the ECU, using a real EPB sample and a virtual electronic parking switch. The control method is as follows: the upper computer sends control signals (including EPB switch mode signals, etc.) The forward and reverse signals are sent to the driving end of the rapid prototyping system, and the driving end of the rapid prototyping system sends the EPB motor circuit current signal to the signal acquisition module, and the current digital signal is sent back to the mode control module by the signal acquisition module, forming a closed-loop control, driven by the rapid prototyping system The terminal drives the EPB to work to realize the emulation of the EPB function mode. The measurement of the EPB functional mode is realized by the clamp release time measurement module.

The invention discloses a simulation testing machine for evaluating cooling uniformity of an internal combustion engine. The simulation testing machine comprises: an internal combustion engine body, a water pump, a high-temperature oil pump, a first motor, a second motor, a flowmeter of cooling water, a cooling fan, a radiator, a first throttle valve, a second throttle valve, a sensor of outlet temperature of cooling water, a sensor of outlet pressure of cooling water, a boiler of heat transfer oil, a high-temperature flowmeter, a simulated piston, a measuring plate, and the like. According to the invention, the boiler of heat transfer oil is used to heat silicone oil as well as make the heated silicone oil circulated and pass a cylinder of the internal combustion engine so as to simulatethe actual heating of the internal combustion engine; besides, cyclic cooling liquid is used for cooling the simulation testing machine. According to the testing apparatus, the measuring plate is arranged between a cylinder cover of an engine and the body, so that relevant sensors van be arranged to measure internal parameters of a cooling water jacket of the internal combustion engine. Compared with an actual internal combustion engine, the simulation testing machine has advantages of simple structure and short test period; in addition, a function of high-efficient measurement of cooling uniformity of the internal combustion engine can be realized with low cost.

The invention discloses a device and a method for testing the corrosion of electrically accelerated concrete under a high hydraulic gradient. The device comprises a test chamber, an external pressuremachine, an external power supply and test electrodes, wherein the test chamber is internally provided with at least one pressure test cabinet, a test piece fixing groove is formed in the middle partof the pressure test cabinet, and a concrete test piece is used for partitioning the pressure test cabinet into a positive electrode test area and a negative electrode test area; the test electrodes comprise a test positive electrode and a test negative electrode, the test positive electrode is arranged inside the positive electrode test area, the test negative electrode is arranged inside the negative electrode test area, and each of the positive electrode test area and the negative electrode test area is filled with a conductive corrosion solution; the external pressure machine is connectedwith a pressure pipeline, and the other end of the pressure pipe stretches into the conductive corrosion solution in the positive electrode test area; and drainage sampling pipes are arranged at the bottom of the positive electrode test area and the bottom of the negative electrode test area respectively. The influence of permeating corrosion for concrete performance can be tested under long-termconstant high hydraulic gradient effect, related test data can be measured, and concrete corrosion test research is carried out.