13 results about "Thermo elastic" patented technology

The utility model discloses an axial floating type high-pressure ejector pin device, relates to the technical field of high-pressure ejector pin devices, and aims to solve the essential contradiction of rigid topology that a dynamic multi-physical field problem is simplified into a static mechanical model, and a synergistic effect mechanism of stress wave propagation, thermoelastic deformation and turbulence dissipation in a high-pressure system is ignored. According to the key points of the technical scheme, the ejector pin comprises a mounting pin sleeve, an ejector pin body is detachably connected to the interior of the mounting pin sleeve, an ejector pin head is fixedly connected to the upper end of the ejector pin body, a compression spring is fixedly connected to the interior of an insertion groove, and the compression spring is fixedly connected to the interior of the insertion groove. A pressing block is movably connected to the face, away from the inserting groove, of the pressing spring, a positioning pressing block is fixedly connected to the interior of the inserting groove, and a pressing ball and a clamping positioning block are clamped between the positioning pressing block and the ejector pin body. A local stress peak value is reduced to a material safety threshold value through elastic deformation, and fatigue crack initiation is effectively inhibited.

The invention provides an elastic multi-layer structure composite fabric and a preparation method thereof. The elastic multi-layer structure composite fabric comprises a multifunctional integration layer, an elastic supporting layer and a close-fitting cool feeling layer which are sequentially stacked and connected in a composite mode. Wherein the close-fitting cool-feeling layer is one surface in contact with the skin; the multifunctional integrated layer comprises a heat and energy storage layer and a multifunctional composite layer; and the multifunctional composite layer is adhered to the surface of the heat and energy storage layer. According to the scheme, a multi-layer structure fabric compounding mode is adopted, so that the fabric has the functions of cool feeling, antibiosis, ultraviolet prevention, heat storage, elasticity, moisture absorption, breathability, water resistance and self-cleaning, and the compounding performance is stable.

The invention relates to a thermoelastic energy converter system (10) comprising a thermoelastic energy converter (11) with a thermoelastic element (12) as a first component and a chamber wall (15) at least partially enclosing the at least one thermoelastic element (12), wherein the chamber wall (15) defines a chamber (14) as a second component in which the thermoelastic element (12) is arranged.The invention provides that the at least one thermoelastic element (12) is designed as a fluidically tight hollow structure (13) relative to the chamber (14), and that the hollow structure (13) is arranged to penetrate the chamber wall (15) at at least one point, wherein the hollow structure (13) is fluidically tightly enclosed by the chamber wall (15) at this respective point, and one of the two components has two fluidically permeable openings (16) and is thus fluidically permeable, and the other component has at least one opening (17) through which it is coupled to a pressurization device by means of which it can be pressurized with a fluid pressure to deform the thermoelastic element (12). Furthermore, the invention relates to a thermoelastic energy converter (12) for a thermoelastic energy converter system (10).

A thermal elastic topology optimization method for thermal structure under thermal stress singular problem belongs to the technical field of thermal elastic topology optimization of thermal structure. First, the finite element modeling of the thermal structure is carried out and topology optimization is carried out, and a clear configuration is realized; then, a thermal elastic topology optimization model is established, and a "super spring unit" is used to connect the nodes on the original fixed boundary to provide weak stiffness constraint; the final thermal deformation response is obtained by superimposing the mechanical displacement component and the thermal displacement component obtained by the mechanical load equation and the thermal load equation respectively; sensitivity analysis is carried out according to the thermal deformation response; finally, the design variables are updated and iterated based on the sensitivity information and the gradient optimization algorithm, and the maximum iteration step and the convergence criterion are set; the units below the threshold value after optimization are deleted, and the units above the threshold value are retained, and the innovative topology structure of the optimized thermal structure is obtained. The present application can avoid the hinge phenomenon, the gray problem and the material effect of the design using the fixed boundary condition, which will be a beneficial supplement to the existing thermal elastic topology optimization method.

The invention belongs to the technical field of deep ground environment mechanical testing, and discloses a device and method for simulating a deep ground high temperature-three-dimensional ground stress coupling environment through a prestressed steel strand. The device comprises a test piece main body system, a prestress applying system, a positioning reinforcing system and a monitoring feedback system. The core of the method is that based on a thermal stress formula under three-dimensional complete constraint in thermoelastic mechanics, additional thermal stress caused by ground temperature rise is calculated, and the additional thermal stress and target three-dimensional ground stress are superposed; and through a post-tensioning pre-stress technology, the superposed total stress is accurately and stably applied to an internal test piece for a long time by utilizing a retard-bonded pre-stress steel strand system and a high-strength concrete transfer medium, so that a deep high-ground-temperature and high-ground-stress coupled mechanical environment is constructed. The problems that a traditional coupling test device is high in cost, difficult to control and difficult to stabilize for a long time are solved, and accurate simulation of the deep ground high temperature-three-dimensional stress coupling environment is achieved.

The invention belongs to the technical field of oil reservoir well testing analysis, and discloses a formation pressure and temperature simulation method based on thermoelastic stress sensibility and application. According to the method, a porosity model and a permeability model are established based on the thermoelastic stress sensibility, and meanwhile the temperature and pressure influence is taken as the precondition; an unstable seepage equation and a heat transfer equation are established, a seepage-heat transfer coupling model is obtained and solved by combining the above equations, and real-time simulation of formation pressure and temperature is achieved. The method is applied to inversion, and seepage parameters or thermodynamic parameters of the reservoir can be obtained. According to the method, the thermoelastic stress sensitivity is fully considered into the seepage flow-heat transfer coupling model, accurate simulation of the pressure distribution condition and the temperature distribution condition of the stratum is achieved, the real-time change rule of the porosity and the permeability of the stratum is reflected, and the method is suitable for forward modeling or inversion analysis of reservoir information.

The application provides an elastic multilayer structure composite fabric and a preparation method thereof. The composite fabric comprises a multifunctional integrated layer, an elastic support layer and a close-to-body cool layer which are sequentially and compositely connected. The close-to-body cool layer is the skin-contacting side. The multifunctional integrated layer comprises a heat storage and energy storage layer and a multifunctional composite layer. The multifunctional composite layer is bonded to the surface of the heat storage and energy storage layer. The scheme adopts a multilayer structure fabric composite mode, so that the fabric has the functions of cool feeling, antibiosis, ultraviolet resistance, heat storage, elasticity, moisture absorption and air permeation, waterproof and self-cleaning, and the composite performance is stable.

The invention discloses a multi-material thermoelastic structure topological optimization method and system containing material allowable temperature constraint, and belongs to the technical field of structure topological optimization. Comprising the following steps: 1) acquiring transient heat conduction and transient thermoelasticity static analysis finite element control equations, and performing finite element analysis on a design model; 2) based on a multi-material SIMP method interpolation model and a material domain identification strategy, establishing a material region time domain maximum temperature constraint function and a structure optimization objective function by using a condensation integral function; 3) establishing a multi-material thermoelastic structure topological optimization model containing material allowable temperature constraint; and 4) carrying out iterative updating on the design variables in the topological optimization model by adopting an MMA algorithm to complete the optimization design of the multi-material thermoelastic structure of the design target. According to the method provided by the invention, the maximum temperature of different material areas can be reflected in real time, and the maximum temperature of each material can be controlled within an allowable range in the topological optimization of the multi-material thermoelastic structure under the transient thermal load.

The invention relates to a thermoelastic energy converter system (10) comprising at least one thermoelastic energy converter (11) with at least one thermoelastic element (12) and with at least two fluidically permeable chambers (14) separated from each other by a respective floor (13) and directly adjacent to each other, in which the at least one thermoelastic element (12) is at least partially arranged and at least partially enclosed by its respective chamber wall (15), wherein each chamber wall (15) has at least two fluidically permeable openings (21).The invention provides that at least one opening (16) of each chamber is connected to at least one opening (16) of a chamber (14) directly adjacent to this chamber (14) via a fluidic connection (17) arranged outside the chambers (14), wherein the at least one thermoelastic element (12) is arranged to penetrate the floor (13) and is fluidically enclosed by it. Furthermore, the invention relates to a thermoelastic energy converter (11) for such an energy converter system (10).

A kind of method for measuring the heat of rod by S type tension and compression force sensor, prepare a fixed support (1), the left end of fixed support (1) is fixed with left baffle (2), the middle part of left baffle (2) is fixedly connected with the left end of S type tension and compression force sensor (3), S type tension and compression force sensor (3) is arranged along the left-right horizontal direction, clamp (4) is installed on fixed support (1) and located at the left side of S type tension and compression force sensor (3), clamp (4) can clamp and fix a thermal elastic rod (5) along the left-right horizontal direction, thermal elastic rod (5) is cylindrical rod;Prepare the thermal elastic rod (5) that needs to measure the heat value, record the length, diameter, the kind of material of the thermal elastic rod (5).Its purpose is to provide a kind of method for measuring the heat of rod by S type tension and compression force sensor, which can deepen the understanding of thermal motion, deepen the understanding of thermal force work, and then improve the utilization efficiency of various heat engines to external work.

The present invention discloses an analysis method and system for the thermoelastic instability characteristics of friction pairs of heavy vehicle automatic transmissions, which are applied to the technical field of automatic transmissions. The method includes the following steps: Based on the theory of thermoelasticity, considering the thickness of the center plate and friction material constituting the friction plate as well as the thickness of the mating steel plate, a structural thermoelastic coupling model is established; the boundary conditions of heat flux density, temperature field and stress field during the sliding friction process of the friction pair are set; based on the symmetric and anti-symmetric thermoelastic deformation modes, system matrices under four modes are constructed; the critical speeds corresponding to each mode are solved, and the main mode of the system is determined by comparison; the influence of the structural parameters and material properties of the friction pair on thermoelastic stability is analyzed. The present invention comprehensively considers the thickness of multi-layer material friction plates and various thermoelastic deformation modes, and for the friction pairs of heavy vehicle automatic transmissions, a thermoelastic instability system matrix under four deformation modes is established to determine the main mode and critical conditions of the system.

The invention discloses a metal plate aerodynamic thermoelastic multi-physical field coupling instability calculation method considering corrosion defects. The method comprises the following steps that 1, corrosion is equivalent to change distribution of material elasticity modulus and density characteristics in the thickness direction; 2, deducing kinetic equations of thermal buckling and thermal flutter of the metal corrosion plate by adopting a Lagrange equation; 3, the flutter speed and the thermal buckling temperature are solved according to the kinetic equation; and 4, comparing and evaluating the flutter speed and the thermal buckling temperature which are obtained by solving with standard values. According to the method, stability parameters such as the thermal buckling critical temperature and the flutter critical speed can be solved synchronously, and the influence rule of the multi-field coupling effect is quantified.

The invention discloses a grain homogenization regulation and control method for a non-oriented silicon steel efficient annealing process, which comprises the following steps: constructing a temperature field-gas field-stress field coupling model, and dynamically controlling the annealing process through a Fourier heat conduction equation and a thermoelastic stress equation sigma = E epsilon + beta delta T; the temperature of a preheating section is 700-750 DEG C, the temperature of a soaking section is dynamically adjusted to be Tp, and the jet cooling rate of a cooling section is 60-150 DEG C / s; gradient protective atmosphere is introduced, and the H concentration of the roll head / roll tail area is 5% higher than that of the middle area; the unit tension is 0.15-0.5 * yield strength, and the furnace roller speed gradient and the strip steel thermal expansion rate are matched. By constructing a multi-field coupling model and adopting a partition temperature control strategy, a gradient protective atmosphere, stress field regulation and control and other means, the dual requirements of grain size uniformity and texture optimization are met, and the method has the advantages that the grain size uniformity is improved, the texture proportion is optimized, and the magnetic performance of the material is stabilized.