A closed engineering optimization method, device, computer equipment and readable storage medium for wading bridge bird protection decision

Abstract

The application discloses a kind of wading bridge bird protection decision closed engineering optimization method, device, computer equipment and readable storage medium, involve engineering design field, including: constructing bird flight trajectory dynamics and energy consumption model, solve the energy consumption minimum flight trajectory under different initial height;Based on the trajectory and bird alert distance, construct the bridge interference alert equipotential surface that the space position set of bird first enters alert distance is characterized;Calculate the bird disturbed area in equipotential surface and the group disturbance probability based on bird group density;Combined with bridge full closure engineering cost and ecological loss cost, construct comprehensive cost function, determine target full closure length by optimizing the function.The method realizes the balance of engineering cost and ecological protection by quantifying bird flight behavior and interference risk, provides scientific decision basis for wading bridge bird protection engineering.

Claims

1. A closed-loop engineering optimization method for bird conservation decision-making on water-crossing bridges, characterized in that, include: A dynamics and energy consumption model of bird flight trajectory was constructed, and the flight trajectory with the lowest energy consumption of birds at different starting altitudes was obtained. Based on the minimum energy consumption flight trajectory and the preset bird warning distance, a bridge interference warning equipotential surface is constructed. The interference warning equipotential surface represents the set of spatial positions of birds at different starting heights when they first enter the warning distance on their minimum energy consumption flight trajectory. Based on the bridge interference warning equipotential surface, the area of ​​birds being disturbed and the probability of the flock being disturbed are calculated. The area of ​​being disturbed is the spatial range within the interference warning equipotential surface in the flight path with the lowest energy consumption. The probability of the flock being disturbed is calculated based on the area of ​​being disturbed and the flock density. Based on the disturbed area and the probability of the group being disturbed, a comprehensive cost function is constructed by combining the engineering cost of full bridge enclosure and the ecological loss cost. The target full enclosure length of the bridge is determined by optimizing the comprehensive cost function. Based on the disturbed area and the probability of disturbance to the group, and combining the engineering cost of full bridge closure with the ecological loss cost, a comprehensive cost function is constructed. The target full closure length of the bridge is determined by optimizing this comprehensive cost function, including: Construct an engineering cost function relating the total length of the bridge enclosure to the overall engineering cost: ;in, The cost per unit area of ​​a closed structure. The total width of the bridge deck, It is a fully enclosed length; Based on the disturbed area and the probability of group disturbance, an ecological loss cost function is constructed between the total length of the bridge enclosure and the ecological loss cost: ;in, The ecological value conversion factor for a single bird. Bird density per unit area during flight This represents the residual interference area. Construct the comprehensive cost function: ; Through the formula: The comprehensive cost function is optimized to determine the target fully enclosed length of the bridge; wherein, For cost-effectiveness slope, The rate of decline in ecological loss caused by changes in enclosure length. The rate of increase in project cost caused by changes in the closed length.

2. The method according to claim 1, characterized in that, The construction of a bridge interference warning equipotential surface based on the lowest energy consumption flight trajectory and a preset bird warning distance includes: Based on the preset bird field of vision range, the two-dimensional minimum energy flight trajectory at each starting height is rotated along the central axis of the bridge to generate a three-dimensional trajectory arc surface; the coordinates of the highest point of the bridge and the preset warning radius are set to construct a cylindrical warning surface with the highest point of the bridge as the center and the warning radius as the radius. For each starting height, solve for the set of horizontal coordinates of all trajectories on the corresponding arc surface when they first touch the cylindrical warning surface; By fitting all the aforementioned horizontal coordinate sets with their corresponding starting heights, an equipotential surface for bridge interference warning is formed.

3. The method according to claim 2, characterized in that, The cylindrical warning surface is defined by the formula: Calculated; in, It is a cylindrical warning surface. The horizontal distance outward from the land shoreline. For flight altitude, The coordinates of the highest point of the bridge. Preset warning radius; The bridge interference warning equipotential surface is defined by the formula: Calculated; in, Equipotential surfaces for bridge interference warning. This is the starting height. To interfere with the boundary location, Minimum starting height, This is the maximum starting height.

4. The method according to claim 1, characterized in that, The calculation of the disturbed area and the probability of bird population disturbance based on the bridge interference warning equipotential surface includes: The area of ​​bird disturbance is determined by the formula: Calculated; in, The area where birds are disturbed. Interference area , The total width of the bridge deck. For takeoff altitude Interference intercept at time; The probability of the group being disturbed is expressed by the formula: Calculated; in, For the probability of group disturbance, This represents the density of the bird flock per unit area.

5. The method according to claim 1, characterized in that, The method further includes: Based on the target full closure length of the bridge, determine the start and end positions of the closure on both sides of the bridge to define the bridge length range to be covered by the full closure project. Based on the bridge disturbance warning equipotential surface, the longitudinal boundary of the spatial range in which birds are susceptible to bridge disturbance is determined in the direction of bridge extension; the longitudinal boundary includes the minimum influence position near one end of the bridge and the maximum influence position far from one end of the bridge. Between the minimum and maximum impact locations, a continuous distance segment equal to the target full enclosure length is measured along the bridge extension direction; The endpoint of the measured continuous distance segment closest to one end of the bridge along the bridge's extension direction is defined as the starting point of the closure, and the endpoint furthest from one end of the bridge is defined as the ending point of the closure. The starting and ending positions are respectively formed as boundary points on both sides of the bridge in the transverse direction; the bridge length range to be covered by the fully enclosed project is the continuous section of the bridge structure along the extension direction of the bridge between the starting and ending positions.

6. The method according to claim 5, characterized in that, The method further includes: Based on the historical prevailing wind direction and wind speed probability distribution data of the area where the bridge is located; Based on the bird flight trajectory deviation pattern under tailwind conditions, the wind speed and wind direction corrections for the minimum and maximum impact positions are calculated respectively. The correction amount is superimposed on the original longitudinal boundary coordinates of the longitudinal boundary to obtain the corrected longitudinal boundary coordinates; Based on the corrected longitudinal boundary coordinates, the minimum and maximum influence positions are redefined.

7. A closed-loop engineering optimization device for bird protection decision-making on water-crossing bridges, characterized in that, include: The acquisition module is used to construct a dynamics and energy consumption model of bird flight trajectories and solve for the minimum energy consumption flight trajectories of birds at different starting altitudes. Based on the minimum energy consumption flight trajectories and a preset bird warning distance, a bridge interference warning equipotential surface is constructed. The interference warning equipotential surface represents the set of spatial positions of birds at different starting altitudes when they first enter the warning distance on their minimum energy consumption flight trajectories. Based on the bridge interference warning equipotential surface, the area of ​​bird interference and the probability of group disturbance are calculated. The area of ​​interference is the spatial range within the interference warning equipotential surface in the minimum energy consumption flight trajectory, and the probability of group disturbance is calculated based on the area of ​​interference and the bird flock density. In the optimization module, the user constructs a comprehensive cost function based on the disturbed area and the probability of disturbance to the group, combined with the engineering cost of full bridge enclosure and the cost of ecological loss. The target full enclosure length of the bridge is determined by optimizing the comprehensive cost function. The optimization module is specifically used for: Construct an engineering cost function relating the total length of the bridge enclosure to the overall engineering cost: ;in, The cost per unit area of ​​a closed structure. The total width of the bridge deck, It is a fully enclosed length; Based on the disturbed area and the probability of group disturbance, an ecological loss cost function is constructed between the total length of the bridge enclosure and the ecological loss cost: ;in, The ecological value conversion factor for a single bird. Bird density per unit area during flight This represents the residual interference area. Construct the comprehensive cost function: ; Through the formula: The comprehensive cost function is optimized to determine the target fully enclosed length of the bridge; wherein, For cost-effectiveness slope, The rate of decline in ecological loss caused by changes in enclosure length. The rate of increase in project cost caused by changes in the closed length.

8. A computer device, characterized in that, The computer device includes a processor and a non-volatile memory storing computer instructions. When the computer instructions are executed by the processor, the computer device performs the method according to any one of claims 1-6.

9. A readable storage medium, characterized in that, The readable storage medium includes a computer program, which, when executed, controls the computer device on which the readable storage medium is located to perform the method described in any one of claims 1-6.

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