Analogue simulation analysis method for steel structure of coal yard

Abstract

The invention relates to the technical field of steel structure simulation, and discloses a coal yard steel structure analogue simulation analysis method, which comprises the following steps: collecting coal yard field data to construct a coal yard steel structure geometric model; grid division is carried out on the steel structure geometric model, material attributes in grids are set, and a coal yard steel structure simulation model is generated; performing reliability evaluation on the coal yard steel structure simulation model based on historical data to generate a reliability evaluation result; and optimizing the coal yard steel structure simulation model based on a reliability evaluation result. When grid division is carried out on a steel structure geometric model, a first-level grid unit complexity score C is calculated, and different grid division strategies are executed based on the first-level grid unit complexity score C. According to the method, the grids can be reasonably divided according to the actual complexity of the grid units, so that the generated coal yard steel structure simulation model has proper grid density and precision in different areas.

Claims

1. A coal yard steel structure simulation analysis method, characterized in that: Including: Collecting on-site data of the coal mine site to construct a geometric model of the steel structure of the coal mine site; Performing mesh division on the geometric model of the steel structure and setting the material properties inside the mesh to generate a simulation model of the coal yard steel structure; Performing reliability assessment on the simulation model of the coal yard steel structure based on historical data to generate a reliability assessment result; Optimizing the simulation model of the coal yard steel structure based on the reliability assessment result.

2. The coal yard steel structure simulation analysis method according to claim 1, characterized in that: When performing mesh division on the geometric model of the steel structure, it includes: Constructing a geometric model of the steel structure by defining the dimensions of nodes, the dimensions of members, and the shapes of members; Performing preliminary stress analysis on the geometric model of the steel structure, and based on the results of the preliminary stress analysis, performing preliminary mesh division on the geometric model of the steel structure to generate multiple first-level mesh elements; Setting the initial material properties of the first-level mesh elements based on historical data; Calculating the complexity score C of the first-level mesh elements; And executing a mesh division strategy based on the complexity score C to generate second-level mesh elements.

3. The coal yard steel structure simulation analysis method according to claim 2, characterized in that: When generating multiple first-level mesh elements, it includes: Performing a simulation test on the geometric model of the steel structure based on the obtained historical environment data of the coal yard steel structure; Setting monitoring nodes at the nodes of the geometric model of the steel structure and at the centers of the members, and applying simulated forces to the geometric model of the steel structure to generate a stress data set D1 at the monitoring nodes, D1 = [d1, d2…di…dn]; Wherein, di represents the stress magnitude of the i-th monitoring node, and n represents the number of monitoring nodes; Performing first-level mesh division on the stress data set D1 at the monitoring nodes to generate a stress data set D2 at the remaining monitoring nodes; Continuing to perform first-level mesh division on the stress data set D2 at the remaining monitoring nodes until all monitoring nodes are divided into first-level mesh elements; Generating multiple first-level mesh elements, including: M1, M2…Mi…Mm; Wherein, Mi represents the i-th first-level mesh element, and m is the number of generated first-level mesh elements, m < n; The first-level mesh division includes: Setting the first deviation value a; calculating the stress deviation value A between d1 and all adjacent monitoring nodes of d1; Selecting all adjacent monitoring nodes with A < a, then dividing d1 and all selected adjacent monitoring nodes into one first-level mesh element; and removing the multiple monitoring nodes included in the first-level mesh element already generated from the stress data set D1 at the monitoring nodes; generating a stress data set D2 at the remaining monitoring nodes.

4. The coal yard steel structure simulation analysis method according to claim 3, characterized in that: When calculating the stress deviation value A between d1 and all adjacent monitoring nodes of d1, it includes: Calculating the comprehensive deviation value ΔFd in the direction: taking the first monitoring node d1 as the current monitoring node; Decomposing the force received by the current monitoring node and the forces received by adjacent monitoring nodes into component forces in the x, y, and z directions; Respectively calculating the differences in the component forces in the x, y, and z directions to generate ΔFx, ΔFy, and ΔFz; Wherein, ΔFx represents the difference in the x-direction component force between the current monitoring node and the adjacent monitoring node in the x direction; ΔFy represents the difference in the y-direction component force between the current monitoring node and the adjacent monitoring node in the y direction; ΔFz represents the difference in the z-direction component force between the current monitoring node and the adjacent monitoring node in the z direction; Generate the comprehensive deviation value ΔFd in the direction through vector synthesis; Calculate the deviation value of the force magnitude |d1 - d(1 + j)|; Wherein, d(1 + j) represents the force value of the adjacent monitoring node of the current monitoring node, and j represents the adjacent distance from the current monitoring node; A = k1 * ΔFd + k2 * |d1 - d(1 + j)|, (k1 + k2 = 1); k1 is the weight of the comprehensive deviation value in the direction, and k2 is the weight of the deviation value of the force magnitude.

5. The coal yard steel structure simulation analysis method according to claim 4, characterized in that: When calculating the complexity score C of the first-level grid cell, it includes: Obtain the number q of monitoring nodes included in the current first-level grid cell, calculate the aspect ratio r of the current first-level grid cell, and the force distribution degree σ of the current first-level grid cell, and generate the first-level grid complexity score C; C = w1 × q + w2 × r + w3 × σ; Wherein, w1 is the weight of the number q of monitoring nodes included in the current first-level grid cell, w2 is the weight of the aspect ratio r of the current first-level grid cell, and w3 is the weight of the force distribution degree σ of the current first-level grid cell, and w1 + w2 + w3 = 1, and the values of w1, w2, and w3 are adjusted according to historical data.

6. The coal yard steel structure simulation analysis method according to claim 5, characterized in that: When calculating the aspect ratio r in the first-level grid cell and the force distribution degree σ in the first-level grid, it includes: Obtain each interior angle α in the first-level grid cell, α = (α1, α2……, αn); Wherein, αn represents the nth interior angle; Calculate the standard deviation σ of the interior angles in the first-level grid cells α ; Based on the standard deviation σ of the internal angles in the first-level grid cells α Setting multiple inner angle standard deviation thresholds, and generating the aspect ratio r of the current first-level grid cell based on the inner angle standard deviation thresholds; Calculate and base on the standard deviation of the force σ f Set multiple force standard deviation thresholds; Generate the force distribution degree σ of the current first-level grid cell based on the force standard deviation threshold.

7. The coal yard steel structure simulation analysis method according to claim 5, characterized in that: When performing the grid division strategy based on the complexity score C to generate the second-level grid cell, it includes: Set the complexity threshold C1 based on the complexity score C; If C ≤ C1, the complexity level of the current first-level grid cell is the first-level complexity, Execute the primary grid division strategy; If C1 < C, the complexity level of the current first-level grid cell is the second-level complexity, and execute the advanced grid division strategy.

8. The coal yard steel structure simulation analysis method according to claim 7, characterized in that: The grid division strategy includes: The primary grid division strategy includes: performing equal-proportion division based on the shape of the current first-level grid cell to generate the second-level grid cell; The advanced grid division strategy includes: calculating the force distribution degree σ of the nodes in the current first-level grid cell; and dividing the current first-level grid cell based on the force distribution degree σ inside the current first-level grid cell to generate multiple second-level grid cells.

9. The coal yard steel structure simulation analysis method according to claim 8, characterized in that: When optimizing the coal yard steel structure simulation model, it includes: Re-calibrate the initial material properties in the second-level grid cell to generate the coal yard steel structure simulation model; Perform a reliability assessment on the coal yard steel structure simulation model based on the obtained historical environmental data of the coal yard to generate a reliability assessment result; And optimize the coal yard steel structure simulation model based on the reliability assessment result.

10. The coal yard steel structure simulation analysis method according to claim 9, characterized in that: When generating the reliability assessment result, it includes: structural reliability assessment and response reliability assessment; Among them, the structural reliability assessment includes: Perform a static analysis on the coal yard steel structure simulation model to determine the stability value of the coal yard steel structure simulation model under static load; Determine the natural vibration frequency and modal shape of the second-level grid cell through modal analysis to generate the resonance risk value of the coal yard steel structure simulation model; Generate a structural reliability assessment value based on the stability value and resonance risk value of the coal yard steel structure simulation model; Response reliability assessment includes: Based on historical data, earthquake simulation is performed on the coal yard steel structure simulation model, the residual safety reserve of the structure is calculated, and the first response reliability assessment value is generated; Based on historical data, loads are gradually applied to simulate the settlement process of the foundation, calculate the changes in the structural stress field of the coal yard steel structure simulation model, and generate the second response reliability assessment value; Combining the first response reliability evaluation value and the second response reliability evaluation value to generate a response reliability evaluation value; The reliability assessment result is generated by performing weighted summation on the structural reliability assessment value and the response reliability assessment value.

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