30results about How to "Method concept is clear" patented technology

The invention relates to a lower-bound limit analysis method of bearing capacity considering rock translation and rotation effects at the same time, and belongs to the technical field of rock slope stability analysis. According to the method, a rigid block unit is scattered as a geometry system of a rigid rock and a structural plane, the normal force, shearing force and bending moment of the structural plane are used as unknown quantities, a static permission stress field satisfying an equilibrium equation considering the translation and rotation effects of the rigid block unit, structural plane shear yield conditions, structural plane tensile yield conditions, structural plane rotational yield conditions and static boundary conditions is constructed, an overload coefficient is used as a target function, and a lower-bound linear mathematic programming model is built; the linear mathematic programming model is solved by means of an interior point algorithm, a strength reserve coefficient is solved by means of an iterative method at the same time, and the lower-bound solution and corresponding yield area of the overload coefficient or the strength reserve coefficient of the jointed rock slope are acquired. The method has the advantages that the concept is clear and the computational accuracy is high, and the method can be applicable to bearing capacity analysis of translational or rotational failure of the jointed rock slope.

The invention relates to a calculation method for ultimate bearing capacities of rock slopes with rock bridges, and belongs to the field of rock slope stability analysis. The method comprises the following steps of: dispersing a rock slope with rock bridges by adoption of a composite element method on the basis of a theory of the plastic ultimate analysis lower limit method; establishing a nonlinear mathematic programming model for stability analysis of rock slopes with rock bridges by taking an ultimate load and a strength reserve coefficient of the rock slope as target functions; and solving maximum values of the ultimate load and the strength reserve coefficient by using a mathematic programming optimization algorithm. According to the method provided by the invention, the plastic ultimate analysis lower limit method, a composite element method dispersion technology and a mathematic programming measure are combined to establish a rock slope ultimate bearing capacity solution method which not only can simulate the continuous media characteristics of the rock bridges, but also can simulate the non-continuous media characteristics of rock blocks. The method provided by the invention has the characteristics of being clear in concept and high in calculation precision, and can be applied to the analysis of bearing capacities of the rock bridges in rock slopes.

The invention relates to an upper-bound limit analysis method of ultimate bearing capacity of rock slope considering rock translation and rotation effects at the same time, and belongs to the technical field of rock slope bearing capacity analysis. According to the method, based on a plastic upper-bound limit analysis theory, by means of multiple freedom degree rigid block unit discrete jointed rock slope, the translational speed and rotational speed of the rigid block unit centroid are used as unknown quantities, the translation and rotation mechanical effects of rocks are considered at the same time, the overload coefficient of the slope is used as a target function, and plastic flowing conditions satisfying shear failure, tensile failure and rotational failure of a structural plane are constructed; then combined with a virtual work principle and speed boundary conditions, a linear mathematic programming model for working out the ultimate bearing capacity of the jointed rock slope is built, the linear mathematic programming model is solved by means of a simplex method, a strength reserve coefficient is solved by means of an iterative method at the same time, and finally the upper-bound solution and corresponding failure mechanism of the ultimate bearing capacity of the jointed rock slope are acquired. The method has the advantages that the concept is clear and the computational accuracy is high.

The invention discloses a method for computing an optimal anchoring angle of a rock slope wedge, and belongs to the technical field of analyzing the stability of a rock slope and strengthening the rock slope. A security coefficient of the wedge-shaped slope serves as an objective function, the angle and the direction of anchoring force serve as optimization variables, constraint conditions such as the balance equation of the wedge, the yield condition of a structural surface and the boundary condition are combined, and the method which is used for computing the optimal anchoring angle of the wedge and can maximize the security coefficient is provided. The computing method can compute and obtain the optimal anchoring angle of the wedge accurately, easily and conveniently, has the advantages of being clear in concept, high in computing accuracy and the like, and brings convenience for engineering technicians to carry out optimal design for strengthening the wedge so as to achieve the purpose of being safe and economical.

The invention discloses a plastic limit analysis upper-bound method for ultimate bearing capacity of a masonry retaining wall, relates to a plastic limit analysis method for solving ultimate bearing capacity of masonry retaining, and belongs to the technical field of side-slope protection projects. The method comprises the steps of taking the masonry retaining wall as a research object; simulating mechanical properties of masonry by adopting a rigid block element based on a theory of the plastic limit analysis upper-bound method; establishing external force overload conditions by taking a displacement rate of the centroid of the block element as an unknown variable and introducing a Rankine earth pressure theory; establishing a kinematically admissible velocity field meeting rigid block unit and mortar layer surface deformation compatibility conditions, plastic flow constraint conditions, internal and external power equality conditions and velocity boundary conditions; building a nonlinear mathematic planning model for solving the ultimate bearing capacity of the masonry retaining; and solving a minimum value of an ultimate load by using an optimization algorithm. The method has the characteristics of definite concept, high calculation precision and the like, and can be applied to the analysis of the bearing capacity of the masonry retaining wall.

The invention discloses an action imitation fitting degree evaluation method, which is characterized by describing the human body postures by the unit vectors of the limbs of the human body; carryingout fitting calculation on a demonstrator key frame and a plurality of simulator comparison frames in a set range; obtaining the posture, closest to the demonstrator, of the simulator, so that the comparison errors caused by action time delay of the simulator and the demonstrator are avoided, the method is closer to the actual situation that the simulator learns along with the demonstrator in action interaction training, and the processing effect is superior to that of a DTW algorithm. By introducing a time difference index attenuation function, the time difference between the posture of the demonstrator and the posture of the simulator is considered, and the fitting degree calculation error possibly caused by comparison of multiple postures of the simulator is made up. The method can be used for the fitting degree evaluation of long-time continuous actions, can evaluate and display the fitting degree in real time, and can guide a simulator to improve the training effect in a targetedmanner through the comparison of a fitting degree curve and a demonstrator key frame.

The invention discloses a network transaction method based on privacy protection trust evaluation. The method is safe under a half-honest network environment and a malicious network environment, and the safety of privacy protection can be effectively implemented; the computing process of the method is simple and efficient so that the result can be rapidly computed; and the method can be effectively applied to various network environments and has strong practicability. The method can be widely applied to various real-world applications, such as electronic commerce, P2P (peer-to-peer) networks, wire1ess sensor networks, cloud computing and the like.

The invention discloses a calculation method for heterogeneous anisotropic hardened particle peripheral interface volume fractions. The calculation method comprises the following steps that 1, the sizes of heterogeneous anisotropic particles are defined, and particle size distribution of the multi-particle-diameter heterogeneous anisotropic particles is calculated; 2, volume fractions of a base body are calculated; 3, the average volume and the average surface area of the heterogeneous anisotropic particles are calculated; 4, the number density of the heterogeneous anisotropic particles is calculated; 5, the heterogeneous anisotropic hardened particle peripheral interface volume fractions are calculated. The calculation method shakes off the restraint of the original research technology which can only be used for the simplest spherical particles, and the calculation method for interface volume fractions has higher universality and representativeness.

The invention relates to the technical field of wedge body stability analysis, and particularly a slope monitoring method based on a fissure water pressure distribution law of a wedge body. The methodcomprises the following steps: 1) identifying a potential unstable wedge body W; 2) performing stress analyzing on the unstable wedge body W; 3) performing analyzing on the fissure water pressure distribution law of the wedge body W; 4) solving a safety coefficient of the wedge body under the water pressure distribution condition of the wedge body; 5) solving a maximum shearing displacement of the wedge body W based on weight parameters; 6) deriving a critical safety displacement; and 7) calculating a displacement of a structure plane crossing line L of the slope, comparing the displacement with the critical safety displacement, and taking corresponding measures according to a comparison result. According to the slope monitoring method based on the fissure water pressure distribution lawof the wedge body, the traditional fissure water pressure distribution law is improved according to stress characteristics of the wedge body, the maximum shearing displacements of the wedge body underthe action of different water pressure distribution are solved, and the inaccuracy for solving the displacement of the wedge body in the traditional method is avoided.

The invention discloses an elastic support cylinder galloping analysis method under a tailstream by taking motion aerodynamic force into consideration. The method is clear in concept, correction considering fluid-solid coupling motion is carried out on the basis of obtaining aerodynamic force load models at different fixed positions, the solving method is simple and clear, and wake flow vibrationof a downstream cylinder relative to an upstream cylinder can be effectively solved. The method comprises the steps of S1, simulating a working condition by a three-component force coefficient; S2, carrying out fitting analysis on a lift resistance coefficient; And S3, establishing and solving a wake flow galloping motion differential equation.

The invention discloses a method for measuring the position of a neutral axis of an engineering structure through modal strain. In a strain mode, the distribution of modal strain of the same cross section accords with a plane cross-section assumption, so the method can calculate the position of the neutral axis through measuring the modal strain of two different positions on the cross section. The method comprises five steps: dynamic strain response collection, strain modal analysis, modal strain extraction, neutral axis position coefficient extraction, and neutral axis height calculation. The method is clear in concept, is simple in flow, is suitable for traffic loading, environment excitation and artificial excitation, achieves the high-precision measurement of the position of the neutral axis of the engineering structure under the a non-static force, is high in market competiveness, and provides technological support for guaranteeing safe and effective operation of the engineering structure.