WO2016106949A1 - 一种山体中分布式地下设施温度场仿真方法 - Google Patents
一种山体中分布式地下设施温度场仿真方法 Download PDFInfo
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- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Definitions
- the invention belongs to the field of natural geography, thermophysics and information processing intersection, and more specifically relates to a method for simulating a temperature field of a distributed underground facility in a mountain body, which is used for performing a mountain body with distributed underground facilities under the influence of seepage effect Temperature field simulation.
- the fractured rock mass is a kind of complex rock mass widely encountered in rock mass engineering such as dam foundation, slope, underground cavern, etc. It is a discontinuous medium composed of randomly distributed cracks and rock blocks cut by cracks, rock and soil. There is a gap, rich in flowing water medium, called seepage.
- the distribution of the temperature field of the mountain is controlled by the temperature distribution and thermal state of the shallow crust, and is also affected by the rock mass engineering and external conditions (including groundwater seepage).
- Theoretical and experimental studies have shown that there are generally three ways of transferring heat (ie, heat transfer): conduction, convection, and radiation.
- the distribution of temperature field in engineering rock mass is mainly realized by conduction and convection.
- the seepage movement of groundwater itself is transferred by thermal convection, which affects the temperature field distribution of fractured rock mass.
- Groundwater is in fractured rock mass.
- the magnitude of the seepage velocity directly controls the magnitude of the change in the temperature of the rock mass. Therefore, the effect of seepage on the temperature is very obvious.
- the groundwater flow flows in the vertical direction in the fracture.
- the temperature of the groundwater flow is lower than the temperature of the rock mass. Therefore, the temperature of the rock mass is transmitted to the water flow, so that the temperature of the water flow is flowing.
- the direction gradually increases, which in turn changes the distribution of the temperature field of the rock mass.
- the temperature of the water flow approximates the temperature of the rock mass, and the heat reaches an equilibrium state within a given range.
- the existing thermal simulation method of underground objects only considers the thermal field distribution of underground facilities under solid conduction such as rock soil, and does not take into account the influence of rock fissures and fluid medium on the distribution of underground temperature field, while fluid medium makes underground facilities
- the thermal field exchange with the mountain is faster and more apparent on the surface.
- ANSYS general finite element analysis software
- the present invention considers that the fractured rock mass is a substance having a continuous medium property, that is, the fractured rock mass is composed of a fracture system with poor porosity and strong water permeability, and a rock block with good void property and weak water conductivity, according to the dual medium.
- the present invention proposes a method of equivalently forming a seepage field into a "capillary" which is randomly and evenly distributed in a mountain, and simulates a temperature field of a mountain body containing a distributed underground facility under the influence of a seepage field.
- the present invention provides a method for simulating a temperature field of a distributed underground facility in a mountain, the method comprising the following steps:
- Physical characteristics and temperature distribution simulation modeling of mountain and distributed underground facilities physical characteristics modeling of mountain and distributed underground facilities, temperature/infrared imaging simulation platform for underground targets based on physical feature model (Simulation Platform Of Temperature/Infrared Image Formation (SPTIF) directly models the physical characteristics of the geometry of the mountain and distributed underground facilities to establish a geometric model of the mountain and distributed underground facilities;
- SPTIF Simulation Platform Of Temperature/Infrared Image Formation
- Model of seepage field abstract the seepage field into a thin and evenly distributed thin tube in multiple mountains, and add it to the distributed underground facility temperature simulation model;
- the step (2) specifically comprises the following sub-steps:
- the step (2.1) specifically includes:
- the mountain contour data is separated into 17 regions, each region is at the same altitude.
- the different regions are horizontally independent of each other, not interlaced, with a hierarchical structure in the vertical direction, and a high altitude region in the vertical direction.
- the projection is contained in a closed curve with a low altitude;
- the mountain structure is further abstracted by the data structure of the multi-fork tree.
- the mountain tree structure is constructed by reversing the mountain, each area as a node, and the bottom of the mountain is the root node of the tree, if it is projected in the vertical direction.
- the upper layer has a closed relationship with the next layer, and the next layer is the child node of the previous layer.
- the step (2.2) specifically includes:
- the node is a leaf node, and the maximum height of the "capillary" is equal to the altitude of the node. If it is not a leaf node, the next layer of the child node is traversed; if not in the closed curve, the other nodes of the same altitude are performed.
- the algorithm for determining whether a point is in a closed polygon in the step (2.2) specifically includes:
- the step (3) specifically includes:
- the step (3.1) specifically includes:
- the target area is ⁇ 1
- the background area is ⁇ 1
- the target object is a cylinder.
- the upper surface position is ⁇ 1
- the lower surface position is ⁇ 2
- ⁇ o and ⁇ s are the thermal diffusion coefficients of the target and background regions, respectively
- k o and k s are the heat conduction numbers of the target and background regions, respectively.
- the temperature distribution is continuous, satisfying the following two constraints:
- n is the unit normal vector of the space along the x 1 , x 2 or x 3 direction;
- the distributed underground facility thermodynamic model satisfies the following initial conditions and boundary conditions, including:
- g(x) is a temperature distribution function, which is obtained by interpolating the temperature distribution of the rock surface at the initial observation time and some temperature samples of different depths;
- T air is the atmospheric temperature
- T 0 is the temperature distribution on the soil surface
- h conv is the thermal convection coefficient between the soil and the atmosphere.
- T ⁇ is obtained by interpolating the measured values of some locations
- n is an inward or outward unit normal vector of the remaining four faces of the outer surface of the geotechnical region after removing the upper and lower surfaces;
- thermophysical model including the temperature distribution of shallow underground facilities is constructed, and the solution is obtained by solving the model. Temperature distribution of the surface to be predicted:
- the step (3.2) specifically comprises: performing temperature field simulation on a mountain body containing a distributed underground facility in the case of containing a seepage field and without a seepage field, and in the simulation process, the seepage flow is performed.
- the field is equivalent to multiple "capillaries", each "capillary” is a six-sided cylinder, and the distributed underground facility is also composed of a multi-segment cylinder model, in which each face of each conduit is integrated into the SPTIF of ANSYS. Number and information on the underside, top and side of the conduit, and surface numbering information for the distributed underground facility, Therefore, the temperature of the corresponding surface is simulated, and the simulation of the temperature distribution of the mountain is performed.
- the method of the invention accurately calculates the height of the "capillary” randomly distributed in the mountain body by abstracting the data structure of the mountain model data, constructs a seepage field, and then uses the information file of the simulation software to solve the "capillary" and the automatic detection algorithm.
- the bottom, top and side information of the distributed underground facility and its numbering are used to simulate the temperature field of the mountain containing distributed underground facilities under the influence of the seepage field.
- 1 is a main interface of an SPTIF platform in an embodiment of the present invention
- FIG. 2 is a plan view showing the geometric structure of the underground cavern in the embodiment of the present invention.
- FIG. 3 is a side perspective view of a three-dimensional perspective view of a mountain body in an embodiment of the present invention.
- Figure 5 is a geometric model of a distributed underground facility in an embodiment of the present invention.
- Figure 7 is a three-dimensional structural view of a mountain body in an embodiment of the present invention.
- Figure 8 is a finite element model of a mountain body in an embodiment of the present invention.
- Figure 9 is a mountain tree structure in an embodiment of the present invention.
- FIG. 10 is a schematic diagram of determining whether a point is inside a closed polygon in the embodiment of the present invention.
- FIG. 11 is a flow chart of a "capillary" height algorithm in an embodiment of the present invention.
- Figure 12 is a cross-sectional view of a mountain body after adding "capillary" in the embodiment of the present invention.
- Figure 13 is a schematic view showing the thermal model of the underground object and the soil in the vicinity of the embodiment of the present invention.
- 15 is a three-dimensional modeling of an underground facility with a seepage phenomenon added in an embodiment of the present invention.
- 16 is a top view showing a simulation of a mountain thermal field without seepage in an embodiment of the present invention.
- 17 is a top view showing a simulation of a mountain thermal field in which a seepage phenomenon is added in an embodiment of the present invention
- Fig. 19 is a left side sectional view showing the simulation of a mountain thermal field in which a seepage phenomenon is added in the embodiment of the present invention.
- the invention utilizes ANSYS software as the kernel requirement for calculating the temperature field distribution of the underground facility, and combines the high-level programming language VC++ and APDL language to develop the underground target temperature/infrared imaging simulation platform (SPTIF) to establish the physical characteristics modeling of the distributed underground facility.
- SPTIF underground target temperature/infrared imaging simulation platform
- the temperature/infrared imaging simulation platform (SPTIF) of the underground target is introduced:
- the temperature/infrared imaging simulation platform of the underground target is the need to study the infrared simulation image of the underground facility for this project.
- the ANSYS software is used as the kernel requirement for calculating the temperature field distribution of the underground facility, combined with the simulation of the high-level programming language VC++ and APDL language secondary development. platform.
- the core idea is to calculate the target heat transfer process by means of the ANSYS kernel, generate the corresponding temperature distribution map, and then calculate the infrared simulation image according to the infrared radiation principle of the object.
- the integration of the kernel of ANSYS software and the interface display of VC makes the process of thermal analysis easier to use.
- the temperature data converted by ANSYS can be converted to infrared data by the corresponding temperature-to-infrared algorithm developed to obtain an infrared simulation image.
- the underground target temperature/infrared imaging simulation platform is shown in Figure 1:
- the seepage field is abstracted into a very thin and evenly distributed duct in a plurality of mountains, and the temperature field simulation of the distributed underground facilities of the mountain is carried out, so as to maximize the surface and interior of the mountain with distributed underground facilities.
- the temperature field distribution has important significance for guiding the detection and identification of underground facilities.
- the invention provides a method for simulating a temperature field of a mountain distributed underground facility including a seepage effect, comprising the following steps:
- This distributed underground facility is an underground cavern in the mountain.
- the natural scene of the underground cavern is drawn by Matlab software.
- the three-dimensional view of the mountain is shown in Figure 3.
- the construction of the SPTIF geometric model is composed of points, lines, faces and bodies. Points (coordinates) are the basis for building geometric models. Geometry is created by creating a closed curve from key points, a closed curve generating a plane, and then a closed surface to form a geometry. So for our mountain three-dimensional map, we need the point coordinates of the mountain surface. We obtain the contour point coordinates of a certain height of the mountain by extracting the medium high line of Matlab. The contour map of the contour is drawn in ANSYS as shown in Fig. 4.
- the geometric model of the mountain and distributed underground facilities is directly established in SPTIF, and the main roadway is arched.
- the height of the mountain is about 160 meters and the height of the distributed underground facility is 6 meters.
- the geometric model of the distributed underground facility is shown in Figure 5.
- the three-dimensional model after finite element meshing is shown in Figure 6.
- the input mountain contour data is stored in 17 different files, each of which contains information on all the points that make up the closed curve.
- the points in the same file are at the same altitude, so the data divides the whole mountain into 17 regions, which are independent of each other in the horizontal, do not stagger each other, have a hierarchical structure in the vertical direction, and the projection of the high altitude region in the vertical direction is included in the closed curve with low altitude.
- the key points are connected into a curve, the closed curve is formed into a plane, and then the closed surface of the structural structure is formed by the structure of the skin on the side to realize the simulation realization of the complex geometry.
- the three-dimensional structure diagram is shown in FIG. 7 Show, and then through the finite element mesh, the three-dimensional model is shown in Figure 8.
- the seepage field is abstracted into a very fine capillary tube randomly distributed in multiple mountains.
- the groundwater moves in it.
- the direction of motion is related to many factors.
- the coordinates of the bottom surface of the capillary tube are randomly generated, but the height of each capillary tube needs to be further determined. The specific steps are as follows:
- the mountain contour data is separated into 17 regions, each region is at the same altitude.
- the different regions are horizontally independent of each other, not interlaced, with a hierarchical structure in the vertical direction, and a high altitude region in the vertical direction.
- the projection is contained in a closed curve with a low altitude.
- the 17 numbers are 122, 123) and 13 and the areas in parentheses indicate the same altitude.
- the data structure of the multi-fork tree further carries the mountain
- the abstraction is used to locate which blocks each "capillary" belongs to in space, thereby determining the height information of the randomly distributed "capillaries".
- the general idea of the tree structure of the mountain is to reverse the mountain, each area as a node, and the bottom of the tree is the root of the tree. If the projection in the vertical direction is closed to the next layer
- the inclusion relationship of the interval, then the next layer is the child node of the upper layer, and the information of each node is as follows:
- the tree structure of the structure mountain is shown in Fig. 9, and the altitude corresponding to the layer area is indicated in parentheses.
- the horizontal/vertical intersection discrimination method (applicable to any closed polygon, including concave polygons and convex polygons) is used here.
- a horizontal line from point P is used to solve all the intersections of the line and the polygon.
- two intersection points IP 1 and IP 2 are sequentially taken from left to right. If P is inside the polygon, it is inevitable.
- the point P exists between the two points of IP 1 and IP 2 (if it coincides, it is also counted as the middle). Therefore, we can consider each side of the polygon in order and find the total number of intersections.
- the next layer of the child node is traversed; if not in the closed curve, then Other nodes at the same altitude traverse; if the point is not within the closed curve of all nodes at this altitude, the maximum height of the "capillary" is equal to the altitude of the parent node of this node; all points in the structure of the mountain tree Traverse, find the highest altitude corresponding to all points, that is, determine the height corresponding to all "capillaries".
- the simulation of SPTIF is used to obtain the Yujiashan body.
- the mountain profile after adding the “capillary” in the mountain is shown in Fig. 12.
- n is the unit normal vector of space along the x 1 , x 2 or x 3 direction.
- g(x) is the temperature distribution function; in the process of actually dealing with the problem, the temperature distribution of the underground rock and soil at the initial observation time cannot be directly obtained. We can estimate the temperature distribution of the geotechnical surface at the initial observation time and some differences. The depth temperature samples are interpolated.
- the solar radiation energy received by the area mainly includes three parts: direct sunlight, solar scattering and ground reflection.
- Atmospheric radiation in the sky also affects regional temperature changes. Atmospheric radiation is mainly a kind of long-wave radiation. The atmosphere has a certain temperature after absorbing the heat of the sun and the heat of the earth, so it also radiates energy outward at all times.
- the energy entering the region through the convective heat transfer between the surface of the region and the atmosphere is related to the regional temperature, the atmospheric temperature, and the convective heat transfer coefficient h (fluid type, fluid flow pattern, fluid state, solid surface geometry, and temperature difference).
- the heat conduction differential equation can be used to solve the distribution of the temperature inside the region with space and time, and the temperature distribution of the target surface can be obtained.
- the heat conduction equation is based on the law of conservation of energy and the law of Four's. Let the density be ⁇ ; the specific heat capacity of the ground object is c; t represents time; k represents the thermal conductivity of the ground object; ⁇ v represents the heating power.
- boundary conditions describe the heat exchange between the thermally conductive object and the surrounding environment in which it is located at the boundary between the two. Determining the boundary conditions of the features is of great significance for us to analyze the non-steady state heat conduction process.
- T air is the atmospheric temperature
- T 0 is the temperature distribution on the soil surface
- h conv is the thermal convection coefficient between the soil and the atmosphere.
- T ⁇ can be obtained by interpolating the measured values of some locations.
- the geotechnical depth is generally 0.5m to satisfy the soil temperature at this depth is basically constant.
- n is the outer surface of the ⁇ outer surface of the geotechnical area with Inward or outward unit normal vectors on the remaining four faces. This can be understood as the extent to which underground facilities have a limited impact on the temperature distribution of the surrounding area.
- Equations (1)–(4) and initial conditions (5) and boundary conditions (8)(12)(13) constitute the thermophysical model we have solved for solving the temperature distribution of shallow underground facilities. Solving can accurately predict the temperature distribution of the surface of the area.
- the temperature field simulation of the mountain with distributed underground facilities is carried out in the case of seepage field and no seepage field.
- the seepage field is equivalent to multiple "capillaries", and each "capillary” is a six
- the rectangular cuboid and distributed underground facilities are also composed of multi-segment cuboid models. We need to know exactly which side of each duct is integrated with ANSYS. The number in the SPTIF and the information on the bottom, top and side, as well as the surface number information of the distributed underground facilities, to temperature the corresponding surface, simulate the mountain temperature field distribution.
- the present invention devises a method for programmatically detecting the "capillary" of the cuboid type and the bottom, top and side information of the distributed underground facility and its numbering. The specific steps are as follows:
- the input mountain contour data holds the coordinate information of the points of the closed curve.
- the key points are connected into the curve through the contour data, and the closed curve is formed into a plane.
- the closed surface of the structural structure is formed on the side with the structure of the skin to realize the complex geometry.
- the SPTIF configuration file integrated with ANSYS there are information files of points, lines, faces and bodies of the model, wherein the information file KLIST.txt of the point contains coordinates, numbers and other information of all points, and the information file of the line LLIST.txt contains the number of the line, the number of the two ends, the length of the line, and other information.
- the information file ALIST.txt contains the number of the face, the line number of the face, and other information, the body information file VLIST.txt It includes information such as the number of the body and the face number of the formed body.
- the structure of the surface is as follows:
- the structure information of the body is as follows.
- the latitude and longitude of the area where the basement is located is: 30.6° north latitude, 114.1° east longitude, and 180 meters above sea level.
- the direct solar irradiance of the earth's surface is 82.4 W/m 2
- the solar irradiance of the vertical south vertical façade is 11.4 W/m. 2 .
- the illuminance of the solar radiation on the sunny side is 10 W/m 2
- the illuminance of the solar radiation on the shady surface is 8 W/m 2 .
- I.e. solar radiation into heat flux density were sunny side of 10W / m 2, shady side 8W / m 2.
- the field survey measurements are based on the location of the target.
- the temperature field distribution simulation was carried out for the distributed underground facilities without seepage field and seepage field, and the results are as follows.
- the top view of the mountain thermal field simulation without seepage is shown in Fig. 16, and the top view of the mountain thermal field with seepage is shown in Fig. 17.
- the left side cross-sectional view of the mountain thermal field simulation without seepage is shown in Fig. 18.
- the left side cross-sectional view of the mountain thermal field simulation with the added seepage is shown in Fig. 19.
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Abstract
Description
| NO | 点的编号 |
| x | 点的横坐标 |
| y | 点的纵坐标 |
| z | 点的海拔高度 |
| flag | 标记位,是否为感兴趣的点 |
| NO | 线的编号 |
| point[2] | 线的两个端点结构体 |
| flag | 标记位,是否为感兴趣的线 |
| NO | 面的编号 |
| line[4] | 围成封闭面的四条线结构体 |
| flag | 标记位,是否为感兴趣的面 |
| keypoint | 面中心点 |
| isbeyondtunnel | 标记位,是否为地下设施上方的面 |
| NO | 体的编号 |
| areas[6] | 体的六个面结构体 |
| bottom | 体的底面 |
| up | 体的上表面 |
| sides[4] | 体的四个侧面 |
| flag | 标记位,是否为感兴趣的体 |
| height | 体的高度 |
| 环境温度 | 35℃ |
| 地层温度 | 25℃ |
| 目标生热率 | 5×101(W/m3) |
| 介质传导系数 | 3.2(W/m℃) |
| 表面换热系数 | 2(W/m℃) |
Claims (8)
- 一种山体中分布式地下设施温度场仿真方法,其特征在于,所述方法包括如下步骤:(1)山体及分布式地下设施的物理特征和温度分布仿真建模:对山体及分布式地下设施进行物理特征建模,根据物理特征模型在SPTIF中直接对山体和分布式地下设施的几何结构进行物理特征建模,从而建立山体和分布式地下设施的几何模型;(2)渗流场建模:将渗流场抽象为多根山体中随机均匀分布的细导管,加入到分布式地下设施温度仿真模型中;(3)对包含分布式地下设施的山体做含有渗流场和不含渗流场的情况下进行温度场仿真。
- 如权利要求1所述的方法,其特征在于,所述步骤(2)具体包括如下子步骤:(2.1)对山体数据的数据结构抽象,将整个山体抽象成一个有限节点组成的有层次关系的山体树结构;(2.2)利用判断点是否在一个封闭多边形里的算法遍历上述生成的山体树结构,生成多根随机细管的底面坐标,得到每根细管的高度,生成毛细管。
- 如权利要求2所述的方法,其特征在于,所述步骤(2.1)具体包括:将山体等高线数据分离成17个区域,每个区域在同一海拔高度上,不同区域之间在水平上相互独立,互不交错,在垂直方向具有层次结构,海 拔高的区域在垂直方向上的投影包含于海拔低的封闭曲线内;用多叉树的数据结构对山体进行进一步的抽象,山体树结构的构建方法是,把山体倒过来,每个区域当做一个节点,山底就是树的根节点,若在垂直方向上的投影中上一层对下一层有封闭区间的包含关系,那么下一层就是上一层的子节点。
- 如权利要求2或3所述的方法,其特征在于,所述步骤(2.2)具体包括:随机产生一根“毛细管”的底面坐标,从山体树结构的最低层的节点开始,判断该坐标点是否在该层的所有点组成的封闭曲线内,若在此封闭曲线内,如果该层所在的节点是叶子节点,则“毛细管”的最大高度等于此节点的海拔高度,如果不是叶子节点,则对下一层子节点进行遍历;若不在此封闭曲线内,则对同一海拔的其它节点进行遍历,如果该点不在此海拔高度的所有节点的封闭曲线内,说明该“毛细管”的最大高度等于此节点的父节点的海拔高度;对山体树结构中的所有点遍历,找到所有点对应的最高海拔,即确定了所有“毛细管”对应的高度。
- 如权利要求4所述的方法,其特征在于,所述步骤(2.2)中判断点是否在一个封闭多边形里的算法具体包括:(2.2.1)从P点作一条水平直线,从封闭多边形一点P0开始,遍历完整个多边形所有的点,它前一个点表示为P1,后一个点表示为P2;(2.2.2)求水平直线与多边形的所有交点,如果线段P0P2水平,如果p.y=p2.y,则把点P2加入交点集合;如果线段P0P2水平,p1.y=p0.y,则再次把点P2加入交点集合;(2.2.3)如果线段P0P2不水平,求出y=p.y直线和线段P0P2的交点IP,如果IP和P0重合,判断线段P1P0和线段P0P2是否在直线y=p.y两侧,如果是,则把IP加入交点集合;如果IP不和P0重合,则直接把IP加入交点集合;(2.2.4)将交点集合点按横坐标大小排序;(2.2.5)点在边界上判断为不在多边形内,若交点个数为奇数,判断点在多边形外,依次在交点集合中取两个点IP1,IP2,如果存在p.x>=p1.x且p.x<=p2.x,则点P在多边形里面,如果不存在,则点P在多边形外面。
- 如权利要求2或3所述的方法,其特征在于,所述步骤(3)具体包括:(3.1)建立分布式地下设施热力学模型;(3.2)含有分布式地下设施的山体温度场仿真。
- 如权利要求6所述的方法,其特征在于,所述步骤(3.1)具体包括:将地下设施及其附近方形区域表示为Ω={x:0<xi<li,i=1,2,3},方形区域沿三个维度x1,x2,x3方向的边长为l1,l2,l3,区域内任意一点的位置用x=(x1,x2,x3)表示,目标区域为Ω1,背景区域为Ω\Ω1,目标物体为一圆柱体,上表面位置为ρ1,下表面位置为ρ2,αo和αs分别为目标和背景区域的热扩散系数,ko和ks分别是目标和背景区域的热传导数数,观测持续时间为(0,te),区域内任意一点的温度分布记为T(x,t),(x,t)∈Qte=Ωx(0,te);区域Ω内任意一点的温度T(x,t)满足下面的偏微分方程:在目标和周围土壤的交界面处,温度分布具有连续性,满足以下两个约束条件:其中,所述分布式地下设施热力学模型满足如下初始条件和边界条件,包括:●初始条件:在起始观测时刻,假设地下岩土的温度分布已知,记为T(x,0),T(x,0)=g(x),x∈Ω (5)g(x)为温度分布函数,通过对起始观测时刻的岩土表面的温度分布和一些不同深度的温度样值进行插值处理得到;●区域表面热量交换:区域起始观测时刻的温度分布已知后,需要确定其变化情况;给出一定的边界条件,利用导热微分方程求解出区域内部温度随空间和时间变化的分布状态,由此可以得出目标表面的温度分布,地物的边界条件表达为:其中qsun和qsky分别为土壤吸收的太阳和天空辐射,qconv为区域表面和空气之间通过热对流吸收的热量.经过数学变形,(8)式可以写成如下的线性 形式其中p和q(t)分别为天气条件和土壤热特性的函数,Tair是大气温度,T0是土壤表面的温度分布,hconv是土壤和大气之间的热对流系数;●底面条件:假设在足够深的土壤处的温度分布是恒定不变的;其中T∞通过对一些位置的测量值进行插值处理得到;●垂直边界条件:假设选取的岩土区域足够大,在方形区域除去上下表面后剩余四个面处土壤温度分布满足下面的边界条件n是岩土区域Ω外表面除去上下表面后剩余的四个面上的向内或者向外的单位法向量;根据方程(1)—(4)以及初始条件(5)和边界条件(8)(12)(13)构成了包含浅层地下设施区域温度分布的热物理模型,通过对该模型的求解,得到待预测区域表面的温度分布:
- 如权利要求7所述的方法,其特征在于,所述步骤(3.2)具体包括:在含有渗流场和不含渗流场的情况下对含有分布式地下设施的山体进行温度场仿真,在仿真过程中,将渗流场等效为多根“毛细管”,每根“毛细管”是一个六面的柱体,分布式地下设施也是由多段柱体模型组成,根据每根导管的每个面在集成了ANSYS的SPTIF中的编号以及导管的底面、顶面和侧面的信息,以及分布式地下设施的表面编号信息,从而对相应的表面赋温度,进行山体温度场分布仿真。
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| CN104504755B (zh) | 2017-04-19 |
| CN104504755A (zh) | 2015-04-08 |
| US20160364509A1 (en) | 2016-12-15 |
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