69 results about "Applied mechanics" patented technology

The invention discloses a method for determining mechanical parameters of the stratum via the Rayleigh wave speed. According to the method, information from Rayleigh wave exploration is fully utilized, the mechanical parameters of the stratum in geotechnical engineering are inverted according to the Rayleigh wave speed, comparative verification is carried out by combining drilling data, shearing wave speed and indoor geotechnical test, the different mechanical parameters of the stratum are determined via the Rayleigh wave speed, and reference values of stratum mechanical indexes and stratigraphic division are provided for exploration in geotechnical engineering without drilling and pitting data. The method of the invention is efficient, economical and practical, a lot of drilling and pitting work can be reduced, the method is especially suitable for landform and geologic positions which a drilling machine can hardly reach, a result is reasonable and effectively, the working efficiency is greatly improved, the cost is reduced, and an effective solution is provided to determine the mechanical parameters in geotechnical engineering of the stratum.

The invention relates to a three-dimensional vibration analysis method for a composite laminated structure, and the method is applied to the fields of engineering mechanics and vibration engineering. The method comprises: extracting geometric, material and boundary condition parameters of the structure, and setting J non-uniformly distributed calculation planes in a thickness direction for each layer of the structure; configuring displacements of the structure on the calculation planes; performing in-plane component expansion on the displacement of the structure on each calculation plane, applying a boundary condition through a boundary feature function, and obtaining the displacement of the structure on the calculation plane; calculating in-plane directional strain of the structure on the jth calculation plane in an lth layer; calculating strain and stress of the structure in any position of the lth layer; establishing an energy equation of the structure; and calculating a feature equation of the structure. According to the method, the structure is decomposed into a plurality of calculation planes through spatial lamination plane setting; on one hand, the dimensionality of the structure is reduced, so that the calculation speed is increased and the calculation cost is reduced; and on the other hand, the structure is divided into parts, so that parallel calculation is facilitated and the calculation efficiency is improved.

Belonging to the technical field of petroleum and natural gas exploration, the invention relates to an engineering mechanical parameter related brittleness index prediction method. The method includes the steps of: 1) core sampling design and sampling; 2) core sample mineral component testing; 3) testing of core sample Young's modulus and Poisson's ratio; 4) establishment of a mathematical model between rock mineral components and engineering mechanical parameters, and determining the relationship between the mineral components and the rock mechanical parameters; 5) calculation of the engineering mechanical parameters of all samples; and 6) calculation of the rock brittleness index. The method acquires the relationship between the rock mechanical parameters and mineral components and the relationship between the mineral content and the rock brittleness index through mathematical models. The method has the advantages of short test period, simple sampling operation and cost saving, can guide the fracturability evaluation of the rock stratum more efficiently, and provides technical support for oil and gas exploration and development.

The invention relates to a foundation bearing capacity filling packing in-situ detector, belonging to the geotechnical engineering mechanics field. which comprises: a casing, a crossbeam, a load sensor, a transmission shaft, a sounding rod, a sounding head, a data acquisition processor, a control display panel, a communication interface and a power supply box; The invention is characterized in that: the transmission shaft, the sounding rod and the sounding head is connected with the bottom of the load sensor fixed in the inner cavity of the casing; when the sounding head is inserted into soil mass, the load sensor generates a changeable signal, the signal is sampled, amplified, calculated and displayed by the data acquisition processor, and sent to the upper machine through the communication interface for intelligentizing processing. The invention is distinguished from the penetration test apparatus, sand cone method and nucleon density apparatus used in current engineerings, can solves the following problems in existing technologies: 1, in-situ disturbing dehydration caused by drilling soil sampling, 2, radiation pollution of the nucleon density apparatus, 3, the time and labor consumed in digging pit and filling sand, 4, large error in spring force measuring element, 5, visual error in rule read value and impossibility for keeping data.

The invention discloses a steam dust-absorbing and cleaning dual-purpose machine with a parallel structure. The machine comprises a vertical rack, a ground brush connected with a lower end of the vertical rack, a dust cup fixed in front of the vertical rack and a water tank juxtaposed with the dust cup and fixed in front of the vertical rack. The dust cup and the water tank are juxtaposed in front of the vertical rack, so that the steam dust-absorbing and cleaning dual-purpose machine with the parallel structure is beautiful, graceful, good in visuality and simple in structure, meets human engineering mechanics and can increase capability of the water tank furthest, and a dust-absorbing passage and a water way do not interference each other.

The invention relates to a high slope engineering mechanical performance analysis and informationization construction method, which comprises the following steps: S1, investigating and analyzing the high slope engineering to be constructed to obtain basic information; S2, establishing numerical simulation analysis model for the whole construction stage of the high slope to carry out numerical simulation, and grasping the stress and deformation of the high slope in different construction stages; 3, analyzing and displaying each step and detail of that construction process of the high slope through the BIM, and feeding back the obtained data information to the numerical simulation analysis model of the high slope; S4, analyzing and judging the coincidence degree between the numerical simulation result and the actual situation through the linkage between the BIM and the numerical simulation data; S5, according to the numerical simulation analysis model and BIM model analysis results, performing high slope construction.

The invention relates to a modeling method for discretizing plate shell structure, which belongs to the field of engineering mechanics. The modeling method for discretizing the plate shell structure includes: utilizing limited discrete lumped mass matrixes with springs and dampers to simulate vibration response of the original plate shell structure; and determining relevant parameters of the massmatrixes and rigidity matrixes by combining finite element calculation or testing results and by solving non-linear equation. Accordingly, the modeling method for discretizing the plate shell structure is simple in calculation process, practical and high in model accuracy.

The invention discloses a mechanical loading mechanical experimental system and an application method. The system is composed of a carrying system, a movable loading system, a pressurizing system anda fixing system. The carrying system is composed of an upper bearing track, a lower carrying beam and a middle connecting rod; the movable loading system is composed of a carrying wagon box, a movablecontrol device and a counter weight; the pressurizing system is composed of a traction pull rod, a loading pressure head, a force sensor, a counterforce pressure bearing plate, an experimental carrying table, an experimental carrying table support column and a linking rod; and the fixing system is composed of a limiting pulley, a fixed support, a pin roll and a limiting blocking beam. In a usingprocess, by wirelessly operating the carrying wagon box on the carrying track, the whole truss structure can rotate along a fulcrum, so that the linking rod links the traction pull rod to provide a stair load or a long-term stable load to a test piece. By means of the lever principle, the truss structure which is unlikely to deform is adopted, so that the load stability is ensured; the limiting pulley is assembled, so that the pressurizing direction is ensured; the system is integrally mounted underground, so that the experimental safety is ensured; and the system is convenient to mount, simple to operate and suitable for the experimental field of engineering mechanics.

The invention relates to an action science method for determining hardness of engineering materials, and belongs to the fields of basic theory and application technology of engineering mechanics. The method mainly comprises an absolute hardness measuring method, relative hardness, a relative hardness measuring method, and calculation of hardness by determination of resistance. The method has the beneficial effects that based on a new theory of action science, the problems existed in prior engineering material hardness concept definition, accuracy of calculating formula and determination results, uniformity of metric, reliability and the like are solved; the method widens roads for developing and improving basic theory science, basic theory applied science, and engineering material property science, and the industry for manufacturing hardness measuring tools is improved and developed.

The invention discloses a method for calculating the internal force and the deformation of a member or a structure under the action of multiple complex loads. The method comprises the following steps: (1) respectively solving reaction forces RA, RB and RC on a support according to practical loads acting on the member; (2) directly applying seven loads including q1, q2, q3, M, RA, RB and RC to a cantilever beam with one fixed end; (3) respectively making action effects corresponding to seven loads according to the required internal force or deformation; and (4) directly superposing to obtain a result. According to the method disclosed by the invention, the frame or the structure is directly considered as the cantilever beam with one fixed end, and then the action effects of various loads are made and then are directly superposed; compared with the traditional superposition method, the method has the characteristics of convenience and accuracy in calculation and easiness mastering, and is of great significance on developing and perfecting the subject of engineering mechanics.

The invention belongs to the field of structural strain measurement of engineering mechanics and provides a strain measurement wire with two-dimensional code marks at both ends. One end of the strain measuring wire is connected to the strain gauge, and the strain gauge is on the test piece 1, and there is a two-dimensional code mark near the strain gauge, and the two-dimensional code mark has a corresponding relationship with the number of the strain measuring point; The other end is connected to the resistance strain gauge, and the end close to the resistance strain gauge has another two-dimensional code mark, and the two-dimensional code mark is corresponding to the measurement port of the resistance strain gauge. The present invention can improve the efficiency and accuracy of this type of strain measurement experiment, and make the strain gauge and the measurement port correspond efficiently and accurately in the large-scale structure strain measurement experiment of missile and heavy launch vehicle shell, thereby reducing the number of ports in the wiring process. Recorded workload.

The invention discloses a fatigue resistance experiment device for engineering mechanics, and relates to the field of engineering mechanics detection equipment. The device comprises a supporting plate, a fixing structure and a vibrating structure. The fixing structure is arranged on the top side face of the supporting plate. The vibration structure comprises a supporting frame, a guide rail, a vibration rod, a rod groove, a vibration motor, a rotating rod, a connecting rod, a positioning screw, a sliding buckle and a limiting ring. The supporting frame is of an inverted-L-shaped structure. Theguide rail is fixed to the top side of a cross beam of the supporting frame. The sliding buckle is buckled to the outer portion of the top side of the guide rail in a matched mode. When a fatigue resistance test is carried out on a workpiece, workpieces of various sizes need to be obtained. The workpieces of various sizes can be clamped and fixed by arranging the fixing structure and adapting tothe workpieces of any size. The workpieces of various sizes can be knocked in a multi-point mode by arranging the movable vibration structure, multi-point vibration of the workpieces can be achieved,and it is guaranteed that data collection is more comprehensive.

The present invention belongs to the strain measurement field in engineering mechanics and provides a coordinate measuring machine-strain joint measuring method for a large-scale component. The method includes the following steps that: corresponding relations between static strain gauge ports T and strain measurement values E, corresponding relationships between line end identification codes M and resistance strain gauge measuring ports T, corresponding relationships between strain measuring points A and the line end identification codes M, and corresponding relationships between measuring point coordinate measuring machine coordinates G and the strain measuring points A are obtained; the obtained corresponding relationships are merged, so that a measuring point comprehensive information database can be obtained; and stress and strain predictive value of an area to be tested is obtained through using the measuring point comprehensive information database. With the method of the invention adopted, real-time single-point calling and multi-point area interpolation can be realized. The method can be applied to experimental sites of large-scale components such as missiles and heavy carrier rockets. According to the method, the strain measuring point comprehensive information database is constructed, so that the change condition of a strain predictive value at a specific position of a structure can be mastered in real time, and therefore, interactive display and processing of data can be realized in a measurement site.

The invention provides a routine penetrometer which relates to geotechnical engineering mechanics. The routine penetrometer comprises a machine casing, a transverse beam, a load sensor, a transmission shaft, a touch probe rod, a touch probe, a data collection processor, a communication interface and a power supply box. The routine penetrometer is characterized in that the bottom of the load sensor fixed at an internal cavity of the machine casing is connected with the transmission shaft, the touch probe rod and the touch probe. When the touch probe is inserted into a soil body, the load sensor generates a signal change, the data collection processor carries out sampling, amplification and calculating display on the signal change, and the signal change is transmitted to an upper computer by the communication interface and is processed in an intellectualized way. Aiming at being distinguished from a penetrometer, a sand filling method and a nucleon density instrument which are used in engineering at present, the invention makes up the following defects of the prior art: (1) soil acquirement of drilling not only generates disturbance but also loses water; (2) nuclear radioactive rays generate contamination; (3) sand filling of pit digging consumes labor, time and force; (4) a spring used as a force measurement element has large error; and (5) the reading value of a scale has large visual error and also can not retain data.

The invention discloses a fatigue resistance experimental device of engineering mechanics, which comprises a workbench and legs fixed on the bottom thereof, a motor is arranged on the workbench, a first support plate and two symmetrically arranged The second support plate, the first support plate is threadedly connected with a screw rod, a slide bar is arranged between the two second support plates, and both ends of the slide bar pass through the second support plate, and the opposite ends of the slide bar and the screw rod are A pull ring is provided, and the end of the slide bar away from the pull ring is connected with a circular ring. The invention has a simple structure, and is used to simulate the expansion and contraction of the spring in actual use through the mutual cooperation of the motor, the cam, the ring, the slide rod and the screw rod. At the same time, using the progressive relationship between the first gear, the first sheave and the second sheave, the number of stretching times of the spring can be counted, and can be read directly through the digital label to visually display the fatigue strength of the spring.

The invention relates to a numerical analysis method for influence of a random shrinkage defect on the mechanical property of a casting. The method improves the conventional random lattice models, establishes an algorithm for generating any one random shrinkage unit, and allows the algorithm to describe unique character of combination of random cloud aggregated distribution and random scattered distribution of shrinkage. The method can generate a group of numerical value samples (the number of the samples is designated by a user) of any two-dimensional random shrinkage defect, the generated samples can achieve the area, the shape and the location of shrinkage and are random; and the random samples can be further used for statistic analysis of the influence of the random shrinkage defect on effective mechanical behaviors (such as elasticity modulus and stress concentration factors) of the casing, and then the quantitative influence of the random shrinkage defect on the effective mechanical property of the casting. The invention relates to professional fields of finite element analysis, casting defect assessment and engineering mechanics.

The invention provides a method for correcting and predicting the static mechanical parameters of rock under an oil reservoir confining pressure condition. The method comprises: 1, dividing the typesof rock phases in a target area according to the lithology data of a cored well; 2, establishing the confining pressure correction charts of the rock static mechanical parameters of different rock phases; 3, establishing rock static mechanical parameter prediction charts under different rock phase confining pressure conditions; 4, establishing the relationship chart between an oil reservoir confining pressure and a burying depth; and 5, correcting and predicting the rock static mechanical parameter confining pressure. According to the present invention, with the method, the mechanical parameters of rock are corrected into the oil reservoir confining pressure condition under the atmospheric pressure condition, and the mechanical parameters under the new area geological body confining pressure condition can be accurately predicted, such that the great application prospects can be provided for the selection of the mechanical parameters in oil reservoir well boring, geomechanical problemsand engineering mechanics problems.

The invention provides a self-drilling type lateral pressure simulation test device and method for a stratum containing a natural gas hydrate, and belongs to the technical field of rock and soil mechanics. The device comprises a reaction kettle, a cutting tool, a mud conveying mechanism and a lateral pressure testing device, wherein the reaction kettle is used for being filled with natural gas hydrate-containing stratum simulation substances to be tested, the cutting tool is arranged in the reaction kettle and can move up and down relative to the reaction kettle, one end of the mud conveying mechanism is communicated with the reaction kettle, themud conveying mechanism is used for outputting mud cut by the cutting tool from the reaction kettle; the lateral pressure testing device can move to a set depth along with the cutting tool to complete a lateral pressure testing experiment. The method is realized based on the device. The in-situ testing method can be used for directly testing the engineering mechanical parameters of the stratum containing the natural gas hydrate, and meanwhile, the in-situ testing method has important significance on stratum stability of natural gas hydrate development and prevention and control of engineering disasters.

The invention provides a fatigue experiment device based on engineering mechanics. The fatigue experiment device includes a disc body. A cam is arranged in the middle of the disc body. The cam is connected with a motor shaft. A T-type chute is arranged in the ridge of the cam. Multiple sliders are connected in a sliding manner to the T-type chute. Each slider is connected with a spring fatigue experiment connecting mechanism. Each spring fatigue experiment connecting mechanism includes a movable connecting body and an adjustable-length fixed connecting body. A tested spring is connected between each fixed connecting body and the corresponding movable connecting body. Each movable connecting body is connected with the corresponding slider. The middle of each fixed connecting body is correspondingly connected with a tension and pressure sensor. The tension and pressure sensors are in signal connection with an industrial personal computer through a microprocessor. Fatigue experiment can be carried out on a plurality of springs or springs of a variety of specifications simultaneously, and the test efficiency of spring fatigue experiment is greatly improved. Moreover, the force condition of a detected spring in experiment can be fed back in real time, and automatic operation of the whole test process can be realized.

The invention relates to a trace self-adapting torque gearing mechanism and applied mechanics field. It is applied in the process that the torque moment transferring does not vary following the location movement. It could automatically adapt the location movement of the transferring mechanism but need not change the torque value. It is made up of mechanism two arms with rotating degree of freedom, two driving units, wheels, end tooth coupling, universal joints and balance weight device. The driving units and the wheels are separately located in the carapaces of the mechanism arms. The wheels and the rotating shafts of the mechanism arms are connected together. The universal joints are connected to the shaft of the second mechanism arm by end tooth coupling. The balance weight is fixed on the back end of the first mechanism arm. Two mechanism arms would freely rotate around the centre shaft of the wheel to form two degrees of freedom. With the two degrees of freedom of the universal joints, the mechanism could vibrate flexibly and automatically adapt the variation of the location.

The invention belongs to the technical field of engineering applied mechanics, and particularly relates to a device and a method for measuring lateral stress and strain during movement of loose particles. The device for measuring the lateral stress and strain during movement of the loose particles comprises a support, a circulation chute, a rigid stop plate, a fixing device and earth pressure sensors; the circulation chute comprises two side surfaces and a bottom surface, the circulation chute is mounted on the support, and an included angle is arranged between the circulation chute and the horizontal plane; the rigid strop plate comprises a vertical plate and a bottom plate, and the vertical plate is vertically disposed in the middle of the bottom plate; the rigid stop plate is placed onthe bottom surface of the circulation chute, and the fixing device is used for positioning the rigid stop plate on the circulation chute; the earth pressure sensors are arranged on the side surfaces of the circulation chute and the vertical plate of the rigid stop plate. The device and the method are used for simulating the movement process of the loose particles and measuring the lateral stress and strain during movement of the loose particles.

The invention, which belongs to the technical field of engineering applied mechanics, particularly relates to a device and method for determining the acting force of an impact blocking belt during themovement process of loose particles. The device comprises an oblique circulating slot, an adjustable height bracket, a gate, a gate clamping piece, buffering blocking belts, a buffering blocking beltstorage box, a blocking belt height adjusting device, thin plates and fixed earth pressure sensors. The oblique circulating slot is formed in the adjustable height bracket; and an included angle is formed between the adjustable height bracket and the horizontal plane. The gate is arranged on the bottom surface of the oblique circulating slot; the buffering blocking belt storage box is installed at the lower part of the oblique circulating slot; the multiple buffering blocking belts can be arranged in the buffering blocking belt storage box; the thin plates are laid on the buffering blocking belts and the bottom surface of the oblique circulating slot. The fixed earth pressure sensors are arranged at the sides of the buffering blocking belts and the oblique circulating slot. According to the invention, the movement process of loose particles can be simulated and the impact force through the multiple buffering blocking belts and the changing process of the loose particles in the movement process are measured.

The invention relates to an experimental method for scientific prediction of the action science, and belongs to the research field of natural science basic theory, material science and predication science. The experimental method mainly includes the following steps: A, measuring active action in an experiment; B, according to the relationship between deformation and force in traditional theories of material mechanics, engineering mechanics and rock and soil mechanics, measuring and recording deformation of a material under measured action conditions at any time; C, creating a relation equation between the action and the deformation; D, calculating virtuality and solidity parameter values of the material; E, calculating change rates of virtuality and solidity; F, predicting service life of the material. The experimental method has the advantages that experimental data completely identical to the reality and the engineering application method are provided, and scientific experiments are truly scientific, systematical, theorized and practical; the parameters and the method both needed by practical problem solutions can be provided, and the type and the number of natural science parameters are greatly reduced.