A method for calculating the initial temperature field of a large-size casting chamber with layered and striped structures.

Abstract

This invention belongs to the field of concrete dam construction technology and relates to a method for calculating the initial temperature field of a large-size concrete pouring silo with layered and striped sections. The method includes the following steps: 1) Establishing a refined simulation model of the concrete pouring silo by dividing it into layers according to the actual pouring progress; 2) Drawing a pouring information table for the silo; 3) Using the pouring information table obtained in step 2), performing simulation on the refined simulation model of the concrete pouring silo obtained in step 1) to obtain the initial temperature field of the silo. This invention provides a method for calculating the initial temperature field of a large-size concrete pouring silo with layered and striped sections, which can perform refined simulation of the initial temperature field of the concrete pouring silo and provide an important reference for formulating scientific and reasonable dynamic temperature control measures.

Description

Technical Field

[0001] This invention belongs to the field of concrete dam construction technology, and relates to a method for calculating the initial temperature field of a pouring chamber, and more particularly to a method for calculating the initial temperature field of a large-size pouring chamber with layered and striped sections. Background Technology

[0002] Temperature field simulation of concrete dams is a key technical aspect of hydraulic engineering design and construction, and a core technology spanning design, construction, and operation and maintenance. Its value lies not only in crack prevention but also in promoting the refinement and intelligence of hydraulic engineering through multidisciplinary collaboration. Theory and practice show that accurately understanding the true temperature distribution and its variation patterns within the dam body is fundamental to formulating scientifically sound temperature control measures and analyzing the process of temperature crack formation in concrete. While various simulation methods exist for the temperature field of concrete dams, refined simulation methods for the initial temperature field of the concrete pouring section are still lacking. Refined simulation of the initial temperature field of the concrete pouring section, and the corresponding development of a reasonable and reliable refined temperature control scheme, will further enhance the refinement and intelligence of concrete construction process management, ensuring the quality of concrete construction. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems in the background art, the present invention provides a method for calculating the initial temperature field of a large-size concrete pouring silo with layered and striped sections, which can perform refined simulation of the initial temperature field of the concrete pouring silo and provide an important reference for formulating scientific and reasonable dynamic temperature control measures.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for calculating the initial temperature field of a large-size casting silo with layered and striped sections, characterized in that the method includes the following steps:

[0006] 1) Establish a refined simulation model of the concrete pouring chamber by dividing it into layers according to the actual pouring progress of the concrete pouring chamber;

[0007] 2) Draw up the pouring information table for the pouring sump;

[0008] 3) Using the pouring information table of the pouring silo obtained in step 2), the initial temperature field of the pouring silo is obtained by simulation in the refined simulation model of the concrete pouring silo obtained in step 1).

[0009] Preferably, step 1) is implemented as follows:

[0010] 1.1) Obtain the basic information of the casting silo, which includes the silo surface design, the overall dimensions of the casting silo model, the layout and spatial location of the cooling water pipes inside the casting silo, the casting construction process of the casting silo, and the division of the casting silo blank layers.

[0011] 1.2) Based on the basic information of the pouring silo obtained in step 1.1), construct a concrete pouring silo model and import the concrete pouring silo model into ANSYS;

[0012] 1.3) Mesh all the layers of the concrete pouring silo model in ANSYS to obtain a refined simulation model of the concrete pouring silo.

[0013] Preferably, the pouring information table in step 2) includes at least the concrete pouring temperature T. i-j Ambient temperature T during the pouring process e And the actual pouring time t required for each layer. i-j Where i is the number of the billet layer; j is the number of the strip in the i-th billet layer; and t is the actual casting time t required for each billet layer. i-j It is the difference between the completion time of each layer's pouring and the start time of each layer's pouring.

[0014] Preferably, step 3) is implemented as follows:

[0015] 3.1) Using the pouring information table of the pouring silo obtained in step 2), the first layer of the refined simulation model of the concrete pouring silo obtained in step 1) is simulated to obtain the transient temperature field of the first layer.

[0016] 3.2) Based on the transient temperature field of the first billet layer, the second billet layer of the refined simulation model of the concrete pouring silo obtained in step 1) is simulated using the pouring information table of the pouring silo obtained in step 2) to obtain the transient temperature field of the second billet layer.

[0017] 3.3) Based on the transient temperature field of the second billet layer, repeat step 3.2) until all billet layers in the casting chamber are cast, and obtain the initial temperature field of the casting chamber when the entire casting chamber is completed.

[0018] Preferably, step 3.1) is implemented as follows:

[0019] 3.1.1) The pouring temperature T of the first strip of the first layer in the pouring information table of the pouring chamber in step 2) is... 1-1 Importing the refined simulation model of the concrete pouring sump into the first layer, the initial steady-state temperature field A of the first strip of the first layer is set. 1-1 In ANSY, set the model boundary of the first strip of the first layer of the casting chamber;

[0020] 3.1.2) The completion time t of casting the first strip of the first billet layer 1-1 The simulation step size is set as the first strip of the first billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the first strip of the first billet layer. 1-1 ;

[0021] 3.1.3) The pouring temperature T of the second strip of the first billet layer in the pouring information table of step 2) is... 1-2 Importing the refined simulation model of the concrete pouring sump into the first layer, the initial steady-state temperature field A of the second strip of the first layer is set. 1-2 In ANSY, set the model boundary of the second strip of the first layer of the casting chamber;

[0022] 3.1.4) The completion time t of casting the second strip of the first billet layer 1-1 The simulation step size is set as the second steady-state temperature field of the first billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the second strip of the first billet layer. 1-2 ;

[0023] 3.1.5) The transient temperature field B of the first strip of the first billet layer obtained in step 3.1.2) 1-1 The transient temperature field B of the second strip of the first billet layer obtained in step 3.1.4) 1-2 The elements are merged to form the transient temperature field C1 of the first blank layer.

[0024] Preferably, the specific implementation of setting the model boundary of the first strip of the first layer of the casting chamber in ANSY in step 3.1.1) is as follows: the bottom of the first layer is set as a fixed temperature boundary condition, and the fixed temperature is the stable temperature T0 of the previous casting chamber; the upstream and downstream surfaces and the left and right bank surfaces of the first strip of the first layer are set as convective heat transfer conditions according to the actual concrete dam casting situation.

[0025] Preferably, the method of setting the model boundary of the second strip of the first billet layer in ANSY in step 3.1.3) is exactly the same as the method of setting the model boundary of the first strip of the first billet layer in ANSY.

[0026] Preferably, step 3.2) is implemented as follows:

[0027] 3.2.1) The pouring temperature T of the first strip of the second layer in the pouring information table of the pouring bin in step 2) is... 2-1 The transient temperature field C1 of the first billet layer obtained in step 3.1) is imported into the second billet layer of the refined simulation model of the concrete pouring sump to form the initial temperature field A of the first strip of the second billet layer. 2-1In ANSY, set the boundary of the first strip model of the second layer of the casting chamber;

[0028] 3.2.2) The completion time t of casting the first strip of the second billet layer 2-1 The simulation step size is set as the first strip of the second billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the first strip of the second billet layer. 2-1 ;

[0029] 3.2.3) The pouring temperature T of the second strip of the second layer in the pouring information table of the pouring hopper in step 2) is... 2-2 The transient temperature field C1 of the first billet layer obtained in step 3.1) is imported into the second billet layer of the refined simulation model of the concrete pouring sump, forming the initial temperature field A of the second strip of the second billet layer. 2-2 In ANSY, set the boundary of the second strip model of the second layer of the casting chamber;

[0030] 3.2.4) The completion time t of casting the second strip of the second billet layer 2-2 The simulation step size is set as the second steady-state temperature field of the second strip of the second billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the second strip of the second billet layer. 2-2 ;

[0031] 3.2.5) The transient temperature field B of the second strip of the second billet layer obtained in step 3.2.2) 2-1 The transient temperature field B of the second strip of the second billet layer obtained in step 3.2.4) 2-2 The two layers are merged to form the transient temperature field C2 of the second blank layer.

[0032] Preferably, the specific implementation of setting the boundary of the first strip model of the second layer of the casting chamber in ANSY in step 3.2.1) is as follows: the bottom of the second layer is the transient temperature field C1 of the first layer, and the upstream and downstream surfaces and left and right bank surfaces of the first strip of the second layer are set according to the actual concrete dam casting situation to determine the convective heat transfer conditions.

[0033] Preferably, the method of setting the boundary of the second strip model of the second billet layer in ANSY in step 3.2.3) is exactly the same as the method of setting the boundary of the first strip model of the second billet layer in ANSY.

[0034] The advantages of this invention are:

[0035] This invention provides a method for calculating the initial temperature field of a large-size concrete pouring silo with layered and striped sections, comprising: 1) establishing a refined simulation model of the concrete pouring silo by dividing it into layers according to the actual pouring progress; 2) drawing a pouring information table for the silo; 3) using the pouring information table obtained in step 2) to perform simulation in the refined simulation model of the concrete pouring silo obtained in step 1) to obtain the initial temperature field of the silo. This invention, by proposing a logically sound and highly operable method for simulating and calculating the temperature field of a concrete pouring silo, calculates the distribution of the initial temperature field, thus providing an important reference for formulating scientific and reasonable dynamic temperature control measures. This invention can solve the current problem of refined calculation of the initial temperature field of concrete pouring silos. Through a refined simulation calculation method synchronized with the pouring process, it simulates the temperature distribution changes of the silo during the pouring process, thus providing an important reference for formulating scientific and reasonable dynamic temperature control measures. Attached Figure Description

[0036] Figure 1 It is a physical model of the casting hopper that needs to be poured.

[0037] Figure 2 It uses ANSYS to Figure 1 The model obtained after meshing the casting chamber shown;

[0038] Figure 3 The method for calculating the initial temperature field of the casting silo provided by this invention is applicable to... Figure 1 Information table showing the pouring process in the pouring hopper;

[0039] Figure 4 The transient temperature field of the first billet layer is obtained based on the initial temperature field calculation method of the large-size casting chamber with layered strips provided by this invention.

[0040] Figure 5 The transient temperature field of the second billet layer is obtained based on the initial temperature field calculation method of the large-size casting chamber with layered strips provided by this invention.

[0041] Figure 6 This is a diagram showing the distribution of the initial temperature field of a large-size casting silo, obtained based on the method for calculating the initial temperature field of a layered and striped casting silo provided by this invention. Detailed Implementation

[0042] This invention provides a method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections. The method includes the following steps:

[0043] 1) Establish a detailed simulation model of the concrete pouring silo by dividing it into layers according to the actual pouring progress of the concrete pouring silo. Specifically:

[0044] Step 11: Obtain the design of the required casting silo surface, determine the overall dimensions of the casting silo model, and the layout and spatial location of the cooling water pipes within the casting silo; obtain the casting construction sequence and the division of the casting silo layers. The selected casting silo size is 22m × 23m × 3m, with a total of 6 layers. The casting silo plan is shown below. Figure 1 As shown, where, Figure 1 1-1 is a cross-sectional view of the pouring silo along the river. Figure 1 Figure 2-2 is a cross-sectional view of the casting silo in the direction of the river.

[0045] Step 12: Construct a concrete pouring silo model according to the silo dimensions and layer division, and import the model into ANSYS. The imported ANSYS graphic is shown below. Figure 2 As shown.

[0046] Step 13: Based on the computational requirements, mesh the geometric model. Each blank layer is treated as a separate entity, and each blank layer is meshed. The meshed model is as follows: Figure 2 As shown.

[0047] 2) Draw the pouring information table for the pouring sump, specifically:

[0048] Step 21: Record the opening time of the concrete pouring sump and track the concrete temperature when each layer is poured, recording it as the concrete pouring temperature T. i-j For example, the casting temperature of the first strip of the first billet layer is denoted as T. 1-1 The casting temperature of the second strip of the first billet layer is denoted as T. 1-2 Record the completion time of each layer of concrete pouring until the pouring chamber is completed, and record the completion time of the pouring chamber, as well as the ambient temperature information during the pouring process, denoted as T. e .

[0049] Step 22: Based on the pouring temperature, start time, and completion time of each layer, draw a layer pouring process information table and calculate the actual pouring time t required for each layer. i-j For example, the completion time of the first strip of the first blank layer is denoted as t. 1-1 The completion time of the second strip of the first blank layer is denoted as t. 1-2 And so on. All pouring information is compiled into a pouring information table for the pouring slab, such as... Figure 3 As shown.

[0050] 3) Using the pouring information table obtained in step 2), perform simulation in the refined simulation model of the concrete pouring silo obtained in step 1) to obtain the initial temperature field of the pouring silo. The specific steps are as follows:

[0051] Step 31: Set the casting temperature T of the first strip of the first billet layer.1-1 Importing it into the first billet layer model, we set it as the initial steady-state temperature field of the first strip of the first billet layer, denoted as A. 1-1 In the ANSY framework, the boundary of the first strip of the first layer of the casting chamber is set. The bottom of the first layer is set as a fixed temperature boundary condition, with the fixed temperature being the stable temperature of the previous casting chamber, denoted as T0. The upstream and downstream faces and left and right banks of the first strip of the first layer are set with convective heat transfer conditions based on the actual concrete dam casting situation. Since other layers above the first layer have not been cast, the top of the first layer is set as convective heat transfer. At this time, the concrete outside the first layer has not been cast, so temperature information is not imported for other layers besides the first layer. For example, if the left and right banks of the first strip of the first layer have not been cast, the boundary temperature is set to the ambient temperature T. e If the left and right banks of the first strip of the first billet layer have already been poured, set the stable temperature of the adjacent pouring chamber on the left bank to T. left Set the stable temperature of the adjacent pouring chamber on the right bank to T. right Then the fixed temperature boundary condition on the left bank of the first billet layer is T. left The fixed temperature boundary condition on the right bank of the first billet layer is T. right Among them, T left And T right The concrete temperature can be obtained from actual concrete temperature measurements. During the actual dam pouring process, the concrete temperature can be monitored using point thermometers.

[0052] Step 32: The casting completion time t of the first strip of the first billet layer. 1-1 The simulation step size is set as the steady-state temperature field of the first strip of the first billet layer. ANSYS is used to solve for the temperature distribution. The calculated temperature field is called the transient temperature field of the first strip of the first billet layer, denoted as B. 1-1 .

[0053] Step 33: Set the casting temperature T of the second strip of the first billet layer. 1-2 Importing it into the first billet layer model, we set it as the initial steady-state temperature field of the second strip of the first billet layer, denoted as A. 1-2 Set the second strip model boundary of the first layer of the casting chamber. At this time, the bottom of the first layer is a fixed temperature boundary condition, and the four sides are set with convective heat transfer conditions according to the actual concrete dam casting situation. Since other layers on the first layer have not been cast, the top of the first layer is set to convective heat transfer. At this time, the concrete outside the first layer has not been cast, so the temperature information of other layers besides the first layer is not imported.

[0054] Step 34: The casting completion time t of the second strip of the first billet layer. 1-2The simulation step size is set as the steady-state temperature field of the second strip of the first billet layer, and the temperature distribution is solved. The calculated temperature field is called the transient temperature field of the second strip of the first billet layer, denoted as B. 1-2 The transient temperature field B of the first strip of the first billet layer 1-1 Combined with the transient temperature field of the second strip of the first billet layer B 1-2 This forms the transient temperature field of the first billet layer, denoted as C1. For example... Figure 4 As shown.

[0055] Step 35: Import the casting temperature of the first strip of the second billet layer into the model of the second billet layer strip, and simultaneously import the transient temperature field C1 of the first billet layer. The temperature field formed by the two is denoted as the initial temperature field of the first strip of the second billet layer, and is denoted as A. 2-1 Set the boundary of the first strip of the second layer of the casting chamber. At this time, the bottom of the second layer is the transient temperature field C1 of the first layer. The convective heat transfer conditions are set on the four sides according to the actual concrete dam casting situation. Since other layers on the second layer have not been cast, the top of the second layer is set to convective heat transfer.

[0056] Step 36: The casting completion time t of the first strip of the second billet layer 2-1 The simulation step size is set as the steady-state temperature field of the first strip of the second billet layer, and the temperature distribution is solved. The calculated temperature field is called the transient temperature field of the first strip of the second billet layer, denoted as B. 2-1 .

[0057] Step 37: Import the casting temperature of the second strip of the second billet layer into the model of the second billet layer strip, and simultaneously import the transient temperature field C1 of the first billet layer. The temperature field formed by the two is denoted as the initial temperature field of the first strip of the second billet layer, and is denoted as A. 2-2 Set the boundary of the second strip model of the second layer of the casting chamber. At this time, the bottom of the second layer is the transient temperature field C1 of the first layer. The convective heat transfer conditions are set on the four sides according to the actual concrete dam casting situation. Since other layers on the second layer have not been cast, the top of the second layer is set as convective heat transfer.

[0058] Step 38: The casting completion time t of the second strip of the second billet layer. 2-2 The simulation step size is set as the steady-state temperature field of the second strip of the second billet layer, and the temperature distribution is solved. The calculated temperature field is called the transient temperature field of the second strip of the first billet layer. The temperature fields of the first and second strips of the second billet layer are merged to form the transient temperature field of the second billet layer, denoted as C2. Figure 6 As shown.

[0059] Step 39: Repeat steps 35 to 38 until all billet layers in the casting chamber are poured. After the sixth billet layer is poured, the transient temperature C6 of the sixth billet layer is taken as the initial temperature field of the casting chamber.

[0060] This invention provides a method for calculating the initial temperature field of a large-size concrete pouring silo with layered and striped sections. This method solves the current problem of refining the initial temperature field calculation of concrete pouring silos. Through a refined simulation calculation method synchronized with the pouring process, it simulates the temperature distribution changes within the pouring silo during the pouring process, thus providing an important reference for formulating scientific and reasonable dynamic temperature control measures. In the research on intelligent water cooling of large-volume concrete, it was found that a segmented and block-based water cooling method can be used to achieve different cooling effects in different parts of the concrete (see the article "Intelligent Joint Control Prototype Test Research on Water Cooling of Ultra-High Arch Dams"). However, the uneven temperature field distribution characteristics of large-volume concrete are not yet clear, and further research is needed on the uneven temperature field distribution.

Claims

1. A method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections, characterized in that: The method for calculating the initial temperature field of the large-size casting chamber with layered and striped structures includes the following steps: 1) Establish a refined simulation model of the concrete pouring chamber by dividing it into layers according to the actual pouring progress of the concrete pouring chamber; 2) Draw a pouring information table for the pouring sump; the pouring information table shall include at least the concrete pouring temperature T. i-j Ambient temperature T during the pouring process e And the actual pouring time t required for each layer. i-j Where i is the number of the billet layer; j is the number of the strip in the i-th billet layer; and t is the actual casting time t required for each billet layer. i-j It is the difference between the completion time of each layer of concrete pouring and the start time of each layer of concrete pouring. 3) Using the pouring information table of the pouring silo obtained in step 2), the initial temperature field of the pouring silo is obtained by simulation in the refined simulation model of the concrete pouring silo obtained in step 1).

2. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 1, characterized in that: The specific implementation method of step 1) is as follows: 1.1) Obtain the basic information of the casting silo, which includes the silo surface design, the overall dimensions of the casting silo model, the layout and spatial location of the cooling water pipes inside the casting silo, the casting construction process of the casting silo, and the division of the casting silo blank layers. 1.2) Based on the basic information of the pouring silo obtained in step 1.1), construct a concrete pouring silo model and import the concrete pouring silo model into ANSYS; 1.3) Mesh all the layers of the concrete pouring silo model in ANSYS to obtain a refined simulation model of the concrete pouring silo.

3. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 2, characterized in that: The specific implementation method of step 3) is as follows: 3.1) Using the pouring information table of the pouring silo obtained in step 2), the first layer of the refined simulation model of the concrete pouring silo obtained in step 1) is simulated to obtain the transient temperature field of the first layer. 3.2) Based on the transient temperature field of the first billet layer, the second billet layer of the refined simulation model of the concrete pouring silo obtained in step 1) is simulated using the pouring information table of the pouring silo obtained in step 2) to obtain the transient temperature field of the second billet layer. 3.3) Based on the transient temperature field of the second billet layer, repeat step 3.2) until all billet layers in the casting chamber are cast, and obtain the initial temperature field of the casting chamber when the entire casting chamber is completed.

4. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 3, characterized in that: The specific implementation method of step 3.1) is as follows: 3.1.1) The pouring temperature T of the first strip of the first layer in the pouring information table of the pouring chamber in step 2) is... 1-1 Importing the refined simulation model of the concrete pouring sump into the first layer, the initial steady-state temperature field A of the first strip of the first layer is set. 1-1 In ANSYS, set the model boundary of the first strip of the first layer of the casting chamber; 3.1.2) The completion time t of casting the first strip of the first billet layer 1-1 The simulation step size is set as the first strip of the first billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the first strip of the first billet layer. 1-1 ; 3.1.3) The pouring temperature T of the second strip of the first billet layer in the pouring information table of step 2) is... 1-2 Importing the refined simulation model of the concrete pouring sump into the first layer, the initial steady-state temperature field A of the second strip of the first layer is set. 1-2 In ANSYS, set the model boundary for the second strip of the first layer of the casting chamber; 3.1.4) The completion time t of casting the second strip of the first billet layer 1-1 The simulation step size is set as the second steady-state temperature field of the first billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the second strip of the first billet layer. 1-2 ; 3.1.5) The transient temperature field B of the first strip of the first billet layer obtained in step 3.1.2) 1-1 The transient temperature field B of the second strip of the first billet layer obtained in step 3.1.4) 1-2 The elements are merged to form the transient temperature field C1 of the first blank layer.

5. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 4, characterized in that: The specific implementation method of setting the model boundary of the first strip of the first layer of the casting chamber in ANSYS in step 3.1.1) is as follows: set the bottom of the first layer as a fixed temperature boundary condition, and the fixed temperature is T0; set the convective heat transfer conditions of the upstream and downstream surfaces and the left and right bank surfaces of the first strip of the first layer according to the actual concrete dam casting situation.

6. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 5, characterized in that: The method of setting the model boundary of the second strip of the first layer of the casting chamber in step 3.1.3) is exactly the same as the method of setting the model boundary of the first strip of the first layer of the casting chamber in ANSYS.

7. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 6, characterized in that: The specific implementation method of step 3.2) is as follows: 3.2.1) The pouring temperature T of the first strip of the second layer in the pouring information table of the pouring bin in step 2) is... 2-1 The transient temperature field C1 of the first billet layer obtained in step 3.1) is imported into the second billet layer of the refined simulation model of the concrete pouring sump to form the initial temperature field A of the first strip of the second billet layer. 2-1 In ANSYS, set the model boundary of the first strip of the second layer of the casting chamber; 3.2.2) The completion time t of casting the first strip of the second billet layer 2-1 The simulation step size is set as the first strip of the second billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the first strip of the second billet layer. 2-1 ; 3.2.3) The pouring temperature T of the second strip of the second layer in the pouring information table of the pouring hopper in step 2) is... 2-2 The transient temperature field C1 of the first billet layer obtained in step 3.1) is imported into the second billet layer of the refined simulation model of the concrete pouring sump, forming the initial temperature field A of the second strip of the second billet layer. 2-2 In ANSYS, set the boundary of the second strip model of the second layer of the casting chamber; 3.2.4) The completion time t of casting the second strip of the second billet layer 2-2 The simulation step size is set as the second steady-state temperature field of the second strip of the second billet layer. The temperature distribution is solved using ANSYS to obtain the transient temperature field B of the second strip of the second billet layer. 2-2 ; 3.2.5) The transient temperature field B of the second strip of the second billet layer obtained in step 3.2.2) 2-1 The transient temperature field B of the second strip of the second billet layer obtained in step 3.2.4) 2-2 The two layers are merged to form the transient temperature field C2 of the second blank layer.

8. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 7, characterized in that: The specific implementation method of setting the boundary of the first strip model of the second layer of the casting chamber in ANSYS in step 3.2.1) is as follows: the bottom of the second layer is the transient temperature field C1 of the first layer, and the upstream and downstream surfaces and left and right bank surfaces of the first strip of the second layer are set according to the actual concrete dam casting situation to determine the convective heat transfer conditions.

9. The method for calculating the initial temperature field of a large-size casting chamber with layered and striped sections according to claim 8, characterized in that: The method of setting the boundary of the second strip model of the second layer of the casting chamber in ANSYS in step 3.2.3) is exactly the same as the method of setting the boundary of the first strip model of the second layer of the casting chamber in ANSYS.

Images