6 results about "Equivalent temperature" patented technology

This invention provides a method for simulating buckling of subsea pipelines based on the pipeline element method, addressing the problems of low computational efficiency, complex modeling, and low accuracy in existing methods. Based on Euler-Bernoulli beam theory, this invention models the pipeline as a series of efficient pipeline elements. Internal pressure is converted into equivalent temperature rise, and the effective thermal expansion force generated by the effective temperature rise is applied to both ends of the pipeline element to construct the total potential energy equation. The second derivative of the total potential energy equation is performed to obtain the tangent stiffness matrix of the pipeline element. An updated Lagrange method is used for coordinate transformation. The secant relationship is used to calculate the pipeline element and soil resistance. A Newton-Raphson incremental-iterative numerical program is established to perform nonlinear analysis of the pipeline, progressively solving for the deformation and stress of the pipeline under complex loads. This invention significantly reduces the number of elements, improves computational efficiency, and accurately simulates nonlinear pipe-soil interactions. It is applicable to various pipelines, including short pipes, long pipes, and corroded pipes, as well as complex working conditions such as high temperature and high pressure.

This invention relates to the field of environmental control technology, and discloses an AI-based predictive adaptive environmental regulation method and system for prefabricated cabins. The method includes calculating the equivalent temperature and humidity within the prefabricated cabin; acquiring predicted temperature and humidity sequences over a time range t; determining the start-up and shutdown timing of the equipment based on a comparison of the predicted temperature and humidity sequences with environmental parameter limits; and continuing to acquire predicted data after the equipment completes the start-up and shutdown commands. This invention avoids conflicting operation and ineffective start-up and shutdown by constructing a dynamic control mechanism for the equipment; simultaneously, it achieves predictive proactive control to prevent environmental parameters within the prefabricated cabin from exceeding safety thresholds. Combined with dual operating modes, it flexibly switches control strategies according to the type of equipment within the prefabricated cabin, effectively reducing environmental fluctuations and suppressing condensation within the cabin, thereby reducing the equipment failure rate.

This invention discloses a structural thermo-mechanical coupling method and apparatus considering isogeometric analysis, belonging to the field of thermodynamics. The method includes: S1. Establishing an isogeometric NURBS model: providing the basis for expressing geometric and physical fields for thermo-mechanical coupling analysis, achieving seamless integration of CAD and CAE; S2. Calculating the transient temperature field based on the central difference method: obtaining the temperature distribution of the structure at different times, providing temperature input for subsequent thermo-mechanical coupling; S3. Transforming the temperature field into equivalent temperature loads: converting the thermal effects caused by temperature changes into equivalent loads identifiable by structural mechanics analysis; S4. Solving the stiffness equation of the structure under the combined action of external forces and temperature: obtaining the displacement matrix of the structural control points; S5. Solving the structural coupling field based on the displacement matrix: obtaining all key physical quantities in the thermo-mechanical coupling field, completing the coupling analysis. This invention can verify the feasibility of applying isogeometric analysis in coupled fields.

This application provides a temperature control method and system for a dual-zone substrate heater. The temperature control method includes acquiring a first equivalent temperature and a first target temperature of the inner zone heating element, and a second equivalent temperature and a second target temperature of the outer zone heating element; in response to receiving an operating condition switching command, obtaining a first compensation power based on the target operating condition and the first target temperature, and obtaining a second compensation power based on the target operating condition and the second target temperature; determining a first base power based on the first equivalent temperature and the first target temperature, and determining a second base power based on the second equivalent temperature and the second target temperature; within the same control cycle after receiving the operating condition switching command, obtaining a first target power of the inner zone heating element based on the first base power and the first compensation power, and obtaining a second target power of the outer zone heating element based on the second base power and the second compensation power. The temperature control method of this application can cope with instantaneous disturbances caused by sudden changes in operating conditions and adapt to various operating conditions and temperature changes.

A thermal displacement estimating method includes: detecting each temperature of a predetermined heat generating portion and a predetermined main body structure portion by a temperature measurement device; and estimating a thermal displacement of the heat generating portion by an estimation model based on a detected temperature. The estimating of the thermal displacement includes: obtaining a conversion coefficient equivalent temperature change amount equivalent to a change amount of a conversion coefficient before and after a cooling capacity change from a relationship between a predetermined cooling heat amount of a cooling device and the conversion coefficient between the temperature and the displacement for estimating the thermal displacement from the detected temperature and / or a cooling heat amount equivalent temperature change amount equivalent to a changed heat amount before and after the cooling capacity change from a relationship between the predetermined cooling heat amount and a temperature equivalent to the cooling heat amount.

The present application belongs to the technical field of fan rotating speed adjustment, and particularly relates to a heat dissipation fan rotating speed adjustment circuit and a control method thereof, aiming to solve the problems of independent power supply, single parameter, inaccurate adjustment and insufficient protection of the prior art. The method reuses the power supply circuit of the fan and LED series lamp beads, collects double parameters through a negative temperature coefficient thermistor and a humidity sensor, and calculates an equivalent temperature value through humidity compensation. According to the comparison result of the equivalent temperature value and a preset threshold value, the on-off state and duty cycle of a switch unit are controlled to realize multi-stage adaptive rotating speed adjustment. The actual rotating speed is obtained by detecting the current of the fan power supply circuit, and the deviation is fine-tuned by adjusting the on-off frequency. When the equivalent temperature value is greater than or equal to the limit protection temperature, the alarm, power consumption reduction and maximum rotating speed protection are triggered until the temperature drops below the high temperature threshold. The method does not require independent power supply, is accurate in adjustment, optimizes energy consumption, and is suitable for high-power LED lamp efficient heat dissipation.