Deepening design method for pipeline steel structure lap joint hanging bracket system

Abstract

The invention provides a deepening design method for a pipeline steel structure lap joint hanging bracket system, which belongs to the technical field of building construction and comprises the following steps of: analyzing mechanical conditions and environmental factors of a steel structure roof and a use environment of a pipeline, formulating a preliminary hanging bracket structure scheme, simulating the scheme by utilizing finite element software, and analyzing structural mechanics. The method comprises the following steps: designing connecting nodes of hanging bracket components, establishing a three-dimensional model of a hanging bracket according to a deepened design scheme, performing construction simulation, optimizing the construction of the hanging bracket according to a construction simulation condition, and performing cost estimation according to the structure and material selection of the hanging bracket. And the selection of the hanging bracket material is adjusted according to the structure of the cost budget, and a worker constructs the hanging bracket according to the optimized scheme. The problems that in an existing hanging bracket design, stress analysis is often not meticulous enough, the stress conditions under various complex working conditions are not fully considered, and the safety and reliability of the hanging bracket are affected are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a method for in-depth design of a pipeline steel structure lap hanger system. Background Art

[0002] In the construction industry, steel structures are widely used in various building structures due to their superior mechanical properties, fast construction speed, and recyclable materials, especially in high-rise buildings, large-span spatial structures, industrial plants, etc. However, with the popularity and increasing complexity of steel structure buildings, traditional steel structure construction methods have gradually exposed some problems and limitations.

[0003] In the existing hanger design, the force analysis is often not detailed enough, and the force conditions under various complex working conditions are not fully considered, which affects the safety and reliability of the hanger. In addition, there is a lack of detailed analysis of the hanger construction, which has a certain impact on the construction efficiency of the pipeline hanger. Therefore, a detailed design method for the pipeline steel structure lap hanger system is designed. Summary of the invention

[0004] The embodiment of the present invention provides a method for in-depth design of a pipeline steel structure lap hanger system, which solves the problem that in the existing hanger design, the force analysis is often not detailed enough and fails to fully consider the force conditions under various complex working conditions, thus affecting the safety and reliability of the hanger.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] The present invention provides a pipeline steel structure lap hanger system in-depth design method, comprising the following steps:

[0007] S1, demand analysis, analyzing the mechanical conditions, environmental factors and pipeline use environment of the steel structure roof to determine the structural requirements of the pipeline;

[0008] S2, scheme design, develop a preliminary hanger structure scheme, including structural layout and component types;

[0009] S3, structural analysis, using finite element software to simulate the scheme and conduct structural mechanics analysis;

[0010] S4, deepen the design, refine the hanger structure design, and design the connection nodes of the hanger components;

[0011] S5, construction simulation, build a three-dimensional model of the hanger according to the in-depth design plan, and perform construction simulation, and optimize the construction of the hanger according to the construction simulation results;

[0012] S6, material selection, select the materials and suppliers of the hanger components according to the design requirements, and understand the information of the materials;

[0013] S7, cost budget, make cost estimates based on the structure and material selection of the hanger to understand the cost;

[0014] S8, plan adjustment, adjust the selection of hanger materials according to the structure of cost budget to control costs;

[0015] S9, determine the plan, based on the final material selection and final drawings;

[0016] S10, construction, the staff carried out the construction of the hanger according to the optimized plan.

[0017] As a preferred technical solution of the present invention, step S1 specifically includes:

[0018] Step S11, using sensors to detect the load and connection points of the steel structure roof and perform load analysis;

[0019] Step S12, using the equipment to monitor earthquakes, groundwater levels and climate changes;

[0020] Step S13, analyzing the internal load of the pipeline, including medium pressure and temperature;

[0021] Step S14, collecting and analyzing data on the pipeline construction space;

[0022] Step S15, based on the analysis of steps S11 to S14, design a basic treatment method for the pipeline, including structural optimization of the steel structure roof, the structure of the pipeline hanger, hoisting machinery and equipment, and construction sequence.

[0023] As a preferred technical solution of the present invention, step S2 specifically includes:

[0024] Step S21, planning the preliminary layout of the hangers according to the direction of the pipeline and the building structure, and determining the installation position of the hangers;

[0025] Step S22, calculating the weight of the pipeline and the fluid therein, including the working load and the dynamic load;

[0026] Step S23, determining the spacing of the hangers according to the weight of the pipeline and the load-bearing capacity of the hangers as a preferred technical solution of the present invention, said;

[0027] Step S24, determining a preliminary installation plan for the hanger according to the data of steps S21-S23;

[0028] Step S25, selecting hanger components according to the installation plan, including hangers, beams, connectors, pipe clamps and vibration reduction elements.

[0029] As a preferred technical solution of the present invention, step S3 specifically includes:

[0030] Step S31, determining the analysis direction, including the bearing capacity of the hanger structure, the stability of the hanger structure and the stress distribution of the hanger;

[0031] Step S32, obtaining the design drawings, material properties and load conditions of the hanger based on the hanger layout and components of step S2;

[0032] Step S33, using finite element software to build a model according to the drawings of the hanger, and dividing the model into finite element grids;

[0033] Step S34, defining the properties of the hanger material in the finite element software, setting the boundary adjustment of the hanger structure for constraint, defining the load type, and applying the load to the model;

[0034] Step S35, selecting a solver according to the type of analysis required to solve the model;

[0035] S36, check the solution results and optimize the structure of the hanger according to the structure.

[0036] As a preferred technical solution of the present invention, step S4 specifically includes:

[0037] Step S41, according to the hanger structure optimized in step S3, selecting the type of hanger connection node, including bolt connection and welding connection;

[0038] Step S42, selecting the specification and quantity of the bolts, calculating the preload force and tensile strength of the bolts, and designing the installation method of the bolts;

[0039] Step S43, selecting welding method and welding materials, calculating the strength of the welded joint, and designing the welding sequence;

[0040] Step S44, using finite element software to perform stress analysis on the design of the connection node, determine the type of the node, and decide whether to add a reinforcement structure.

[0041] As a preferred technical solution of the present invention, step S5 specifically includes:

[0042] Step S51, using the "five-step modeling method" based on BIM technology, complete the modeling of the hanger structure, including the hanger rod, beam, connector, pipe clamp and vibration reduction element, and establish the connection relationship and dependency relationship between the components;

[0043] Step S52, integrating the models of the steel roof structure and the pipeline into the model of the hanger to keep the coordinates between the models unified;

[0044] Step S53, defining the scope and type of collision monitoring, running the collision detection tool, and presenting the location and type of the collision in a graphical form;

[0045] Step S54, assessing the severity of the conflict based on the conflict diagram and determining whether the solution needs to be adjusted;

[0046] Step S55, re-performing collision detection after adjusting the scheme until no conflict occurs;

[0047] Step S56, using the maintenance simulation tool to identify the complete model of the collision detection, identify the maintenance problems existing in the model, and display the location of the problem in the model;

[0048] Step S57, modify the hanger plan according to the problem location until no maintenance problem occurs.

[0049] As a preferred technical solution of the present invention, the cost analysis in step S7 is a cost analysis system based on big data, which uses mathematical models and solution algorithms to perform cost budget analysis and control, specifically including:

[0050] Step S71, dividing the cost structure of the hanger into material cost and production cost, where the production cost includes maintenance cost, labor cost and energy cost;

[0051] Step S72, collecting cost data, market price information and supplier quotation information of hangers in past projects, integrating the data and converting them into a format suitable for analysis;

[0052] Step S73, using the collected data to construct a multi-factor correlation analysis mathematical model for the hanger material cost, using a correlation algorithm to analyze the correlation between the hanger material cost and multiple factors, and analyzing the cost influencing factors and their degree of influence;

[0053] Step S74, using the collected data to construct a hanger material cost analysis model based on the big data mining technology of the hanger material cost coupled with the statistical method, and performing a multi-dimensional analysis of the hanger material cost according to the material category, specification, and supplier as a preferred technical solution of the present invention, said;

[0054] Step S75, formulate a construction cost budget according to the hanger material cost information in the model.

[0055] As a preferred technical solution of the present invention, step S8 specifically includes:

[0056] Step S81, using historical cost data and market trends, find the difference between actual cost and cost budget and determine the factors causing the cost difference;

[0057] Step S82, evaluating the impact of different cost factors on the total cost, analyzing the distribution of cost differences on different cost components, and determining which parts have the greatest impact on the total cost;

[0058] Step S83, optimizing the design solution, communicating with suppliers about prices or using alternative materials with lower costs;

[0059] Step S84, tracking the actual cost and predicting the trend of future hanger material cost by using Monte Carlo simulation method;

[0060] Step S85, conduct sensitivity analysis on the forecast results, sort the sensitivity of cost factors, and adjust the project budget.

[0061] As a preferred technical solution of the present invention, step S9 specifically includes:

[0062] Step S91, summarizing the costs based on the final material selection and drawings, conducting a risk assessment on the costs, and formulating corresponding risk response strategies;

[0063] Step S92, submit the plan to the management for approval, integrate the approval opinions to make necessary modifications, and review the modified plan again;

[0064] Step S93, confirm the final cost budget, design plan and construction plan after all approvals and modifications are completed.

[0065] Compared with the prior art, the beneficial effects of the present invention are:

[0066] (1) The present invention uses 3D modeling technology to create a 3D model of the pipeline steel structure lap bracket, conducts collision tests and maintenance simulations, resolves potential conflicts in advance, optimizes the design of the scheme, improves the feasibility of the scheme, and reduces rework and delays during construction;

[0067] (2) The present invention uses a mathematical model to analyze the construction cost of the pipe hanger. The model can integrate historical data, market information, design solutions, supplier quotations and other information to provide a comprehensive perspective to analyze and control costs, optimize the cost control process, and achieve a dynamic association between cost control and construction progress.

[0068] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1The invention discloses a flow chart of a pipeline steel structure lap hanger system in-depth design method. 。 DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] Embodiment 1

[0076] See attached Figure 1 As shown, the present invention provides a technical solution: a pipeline steel structure lap hanger system in-depth design method, comprising the following steps:

[0077] S1, demand analysis, analyzing the mechanical conditions, environmental factors and pipeline use environment of the steel structure roof to determine the structural requirements of the pipeline;

[0078] S2, scheme design, develop a preliminary hanger structure scheme, including structural layout and component types;

[0079] S3, structural analysis, using finite element software to simulate the scheme and conduct structural mechanics analysis;

[0080] S4, deepen the design, refine the hanger structure design, and design the connection nodes of the hanger components;

[0081] S5, construction simulation, build a three-dimensional model of the hanger according to the in-depth design plan, and perform construction simulation, and optimize the construction of the hanger according to the construction simulation results;

[0082] S6, material selection, select the materials and suppliers of the hanger components according to the design requirements, understand the information of the materials, the materials need to have sufficient load-bearing capacity, and select appropriate materials and specifications according to the characteristics of the piping system and the use environment;

[0083] S7, cost budget, make cost estimates based on the structure and material selection of the hanger to understand the cost;

[0084] S8, plan adjustment, adjust the selection of hanger materials according to the structure of cost budget to control costs;

[0085] S9, determine the plan, based on the final material selection and final drawings;

[0086] S10, construction, the staff carried out the construction of the hanger according to the optimized plan.

[0087] The specific implementation methods of the above steps are described in detail below:

[0088] The specific implementation method of step S1 is: using pressure sensors, strain gauges and other sensors to detect the load and connection points of the steel structure roof and perform load analysis, using a seismograph to analyze seismic wave data to determine the intensity and location of the earthquake, using a groundwater level monitoring instrument to detect the pressure of groundwater to calculate the water level, using a ground monitoring station to collect climate data for climate change, using a climate model and historical climate data to predict climate trends, and by analyzing the correlation function of the seismic background noise, the seismic wave velocity change can be extracted, and then the relationship between the seismic wave velocity change and the precipitation and groundwater level adjustment can be analyzed, using Pascal's law and stress formula to calculate and analyze the liquid and fixed pressure in the pipeline respectively, analyzing the thermal expansion of the pipeline, using GIS technology to collect and analyze data on the geographic space of pipeline construction, optimizing the structure of the steel structure roof of the pipeline, such as strengthening the connection nodes, designing the structure of the pipeline hanger and the direction of the pipeline, and selecting lifting machinery and equipment such as a crane according to needs, and making a preliminary design of the construction sequence according to the direction and improved structure.

[0089] The specific implementation method of step S2 is: plan the preliminary layout of the hangers according to the direction of the pipeline and the building structure, determine the installation position of the hangers, calculate the weight of the pipeline and the fluid therein, and evaluate the working load and dynamic load of the pipeline based on the calculated data, wherein the working load is the fluid flow and pressure that the pipeline needs to withstand under normal operating conditions, and the dynamic load is the load caused by changes in fluid flow, such as fluid acceleration or deceleration, pressure fluctuations or temperature changes. The numerical changes are monitored by sensors, and the temperature changes of fluid flow are simulated using fluid mechanics software. According to factors such as pipeline material, cross-sectional stiffness, and allowable deflection, the maximum allowable span of pipeline supports and hangers is determined with reference to relevant specifications. For example, the "Code for Acceptance of Construction Quality of Ventilation and Air-conditioning Engineering" GB50243-2002 provides the maximum spacing of supports and hangers for different pipe diameters to ensure that the hanger spacing meets the stability requirements of the pipeline system. The preliminary installation plan of the hangers is adjusted according to the analysis results, and the hanger components are selected according to the installation plan, including hangers, beams, connectors, pipe clamps, and vibration reduction elements.

[0090] The specific implementation method of step S3 is: using the sensor in step S1 to calculate the bearing capacity of the hanger structure, the stability of the hanger structure and the stress distribution of the hanger, based on the hanger layout and components of step S2, obtain the design drawings, material properties and load conditions of the hanger, use finite element software to establish a model according to the drawings of the hanger, divide the model into finite element grids, define the properties of the hanger material in the finite element software, including elastic modulus, Poisson's ratio, density, yield strength, etc., and set the boundary adjustment of the hanger structure to constrain, such as fixed supports, sliding supports, displacement constraints, etc., and define the load type, apply the load to the model, select static analysis, dynamic analysis, nonlinear analysis and other types of solvers according to the type of analysis required, solve the model, view the results after solution, including displacement, stress, strain, reaction force, etc., and optimize the structure of the hanger according to the structure.

[0091] The specific implementation method of step S4 is: according to the hanger structure optimized in step S3, select the type of hanger connection node, including bolt connection and welding connection, select the specification and quantity of the bolts, calculate the preload force and tensile strength of the bolts, design the installation method of the bolts, select the welding method and welding materials, calculate the strength of the welded joint, design the welding sequence, and the welding method takes into account the weldability of the hanger material, including its thermal expansion coefficient, thermal conductivity, hardness, etc., use finite element software to perform force analysis on the design scheme of the connection node, judge the type of the node, and decide whether to add a reinforcing structure, including stiffening ribs, reinforcing plates, etc.

[0092] The specific implementation method of step S5 is: based on BIM technology, use the "five-step modeling method", according to the five-step modeling method of finding the part plane - setting the working plane - selecting the section properties - determining the starting and ending positions of the part - adjusting the position relationship of the part. After the rod information is created, a node connection can be created between the rods to complete the modeling of the hanger structure, including the hanger, beams, connectors, pipe clamps and vibration reduction elements, and establish the connection relationship and dependency relationship between the components, integrate the steel structure roof structure and pipeline models into the hanger model, keep the coordinates between the models unified, define the scope and type of collision monitoring, including hard collision and soft collision, run the collision detection tool, present the location and type of the conflict in the form of a diagram, evaluate the severity of the conflict based on the conflict diagram, determine whether the plan needs to be adjusted, re-perform collision detection after adjusting the plan, until no conflict occurs, use the maintenance simulation tool to identify the complete model of the collision detection, set the maintenance simulation parameters, including maintenance plan, maintenance tasks and maintenance resources, identify the maintenance problems in the model, and display the location of the problem in the model, modify the hanger plan according to the problem location, until no maintenance problem occurs, and adjust the plan.

[0093] The specific implementation method of step S6 is: based on the adjusted plan, determine the required bearing capacity of the material according to the weight of the pipeline and the force of the hanger, and consider the durability of the material. According to national standards and industry specifications, select materials that meet the requirements, such as carbon steel, stainless steel, aluminum alloy, etc., and determine the cross-sectional dimensions of components such as hangers and beams based on the force analysis and material properties of the hanger. Then, screen based on the information of material suppliers in previous projects to understand the price and supply of the required materials, and perform performance tests on samples provided by suppliers to ensure quality, and make a selection by comprehensively considering material properties, supplier prices and sample test results.

[0094] The cost analysis in step S7 is a cost analysis system based on big data, which uses mathematical models and solution algorithms to perform cost budget analysis and control. The specific implementation method is: divide the cost structure of the hanger into material cost and production cost, and the production cost includes maintenance cost, labor cost and energy cost. Collect the cost data, market price information and supplier quotation information of the hanger in past projects, integrate the data, and convert it into a format suitable for analysis, including structured data or data cubes. Use the collected data to build a multi-factor association analysis mathematical model for the hanger material cost, and use association algorithms to analyze the correlation between the hanger material cost and multiple factors, such as rule algorithms, fuzzy models, rough sets, dynamic fuzzy clustering, etc., to analyze the cost influencing factors and the degree of influence, and use the collected data to build a hanger material cost analysis model based on the big data mining technology and statistical methods of the hanger material cost. Perform a multi-dimensional analysis of the hanger material cost according to material category, specification, and supplier, analyze and diagnose the production process level, management level, and raw material procurement cost of various materials and their sub-categories of suppliers, and formulate a construction cost budget based on the hanger material cost information in the model.

[0095] The specific implementation method of step S8 is: using historical cost data and market trends to find the difference between actual cost and cost budget, determine the factors that lead to cost differences, such as price changes, inefficiency, design changes, etc., evaluate the impact of different cost factors on total cost, analyze the distribution of cost differences on different cost components, determine which parts have the greatest impact on total cost, optimize design solutions, communicate with suppliers about prices or use lower-cost alternative materials, track actual costs, predict future trends in hanger material costs by using Monte Carlo simulation, conduct sensitivity analysis on prediction results, rank the sensitivity of cost factors, adjust project budgets, and ensure budget rationality and flexibility.

[0096] The specific implementation method of step S9 is: summarize the costs according to the final material selection and drawings, conduct risk assessment on the costs, such as material price fluctuations, construction delays, etc., formulate corresponding risk response strategies, such as increasing reserves, optimizing construction plans, etc., submit the plan to the management for approval, integrate the approval opinions to make necessary modifications, review the modified plan again, and confirm the final cost budget, design plan and construction plan after all approvals and modifications are completed.

[0097] The specific implementation method of step S10 is: presetting installation points in the construction space according to the design plan, installing according to the installation points, and modularizing the hanger components, including hangers, beams, connectors, pipe clamps and vibration damping elements, and then assembling the assembled hanger, beams, connectors, pipe clamps and vibration damping element modules using the designed connection method, installing them on the steel structure roof, and hoisting the pipes on the steel structure roof to improve the construction work efficiency according to the modular construction.

[0098] The second specific implementation of the present invention is provided below. The difference from the first specific implementation is that steps S1, S2, S4, S7 and S8 all use mathematical calculations to limit specific data, which is specifically described as follows:

[0099] The specific implementation method of step S1 is: calculating the change of seismic waves to understand the change of the grounding part of the steel structure, and using the monitoring data of the seismograph to calculate the change of seismic waves, the formula is as follows:

[0100]

[0101] Among them, dv is the velocity change of the seismic wave, v is the velocity, the unit is m / s;

[0102] The pressure in the pipeline is calculated by understanding the pressure of the internal fluid. The liquid pressure in the pipeline is calculated using Pascal's law using the following formula:

[0103] P=ρgh

[0104] Among them, ρ is the liquid density, g is the gravitational acceleration, and h is the liquid height;

[0105] The fixed pressure in the pipeline is calculated using the following formula:

[0106]

[0107] Where F is the applied force and A is the area under force;

[0108] The purpose of calculating the thermal expansion of the pipeline is to understand the changes in the pipeline caused by temperature changes and provide information support for the selection of pipeline materials. The thermal expansion formula is used to calculate the thermal expansion of the pipeline as follows:

[0109] ΔL=L·α·ΔT

[0110] Where α is the thermal expansion coefficient of the material and ΔT is the temperature change.

[0111] The specific implementation of step S2 is: calculating the weight of the fluid in the pipeline to provide data support for the load of the pipeline. The calculation formula of the fluid weight is as follows:

[0112] W=ρV

[0113] Where W is the fluid weight, ρ is the fluid density, and V is the fluid volume;

[0114] Calculate the maximum allowable span of the pipe hanger and determine the number and cost of the pipe hangers. The calculation method is as follows:

[0115]

[0116] Among them, L max is the maximum allowable span of the pipe rack under strength conditions, φ is the transverse weld coefficient of the pipeline, W is the bending coefficient of the pipeline section, q is the calculated load of the pipeline length, δ t Allowable stress of steel pipe.

[0117] The specific implementation of step S4 is: when bolts are used to connect the connection nodes, the bolt preload and tensile strength are calculated to find a more stable connection method. The calculation formula of the bolt preload is as follows:

[0118] F=K×F x

[0119] Among them, K is the preload coefficient. The preload is determined according to the properties of the bolt connection surface. The value of K is determined by referring to relevant design specifications or engineering experience. x is the tensile force of the bolt;

[0120] The calculation formula for the tensile strength of the bolt is as follows:

[0121] F x =P×A

[0122] Where P is the tensile load of the bolt and A is the effective area of ​​the bolt;

[0123] When calculating the preload and tensile strength of the bolts, it is necessary to consider factors such as the working conditions of the hanger, material properties, and properties of the connection surface. At the same time, it is necessary to refer to relevant design specifications and engineering experience to ensure the accuracy and reliability of the calculation results;

[0124] When welding is used for connection, calculate the strength of the welded joint to find a more secure way. The specific calculation formula is as follows:

[0125] Tensile strength formula: F = f × k, where f is the tensile strength of the weld metal and k is the stress concentration factor of the weld joint;

[0126] Fatigue strength formula: Where f is the fatigue limit of the weld metal, k is the stress concentration factor of the weld joint;

[0127] The finite element method is used to analyze the forces at the connection nodes and determine the location of the maximum stress concentration at the nodes. Specifically, the structure is discretized into a finite number of units, and an interpolation function is applied to each unit to approximate the displacement field. The forces and displacements at the nodes are used to solve the equilibrium equations of the units.

[0128] The specific implementation method of step S5 is: using 3D software to build a 3D model, integrating model building, collision detection and maintenance simulation functions, and expanding maintenance simulation tools to improve the comprehensiveness of maintenance simulation, and using a collaborative workbench to integrate data from different software and collaborate.

[0129] The specific implementation method of step S7 is: using the correlation algorithm to analyze the correlation between the hanger material cost and multiple factors, using the grey correlation analysis method to take the cost as the reference series and other influencing factors as the comparison series, and calculating the correlation coefficient. The formula is as follows:

[0130]

[0131] Among them, ξ represents the correlation coefficient, R represents a data point in the reference series, max(R) is the maximum value in the reference series, ρ is the resolution coefficient, and ρ is generally 0-1. The correlation degree is the weighted average of the correlation coefficients. Considering the weight, the calculation formula of the correlation degree is:

[0132]

[0133] Among them, w i is the i-th correlation coefficient, ξ i is the i-th correlation coefficient, n is the total number of influencing factors, and the correlation between the factors is obtained. The analysis results are applied to cost control and decision support to optimize material procurement, production process and cost budget;

[0134] Based on the correlation results between various factors, a hanger material cost analysis model is developed by coupling big data mining technology with statistical methods. A classification algorithm is used to group suppliers by material type or production process level, identify the characteristics of high-cost and low-cost suppliers, and use regression analysis to explore the degree and trend of the impact of different factors on costs. A cost prediction model is constructed based on the big data mining results to conduct cost prediction, provide cost control and decision-making support for enterprises, and formulate a construction cost budget based on the hanger material cost information in the model.

[0135] The specific implementation of step S8 is: using the Monte Carlo simulation method to obtain numerical results through repeated random sampling, using a random number generator to generate a random number sequence that conforms to a specific probability distribution, calculating the cost of each simulation based on the generated random numbers and the cost calculation model, repeating steps 3 and 4 enough times to obtain a large number of simulation results, collecting the cost results of all simulations, and using statistical methods to analyze these results, such as calculating the mean, variance, standard deviation, etc., simulating various uncertain factors, so as to understand changes such as raw material price fluctuations and changes in market supply and demand, and predict the range and probability distribution of future hanger material costs;

[0136] The prediction results are subjected to sensitivity analysis, and the sensitivity index of each factor is calculated using the following formula:

[0137]

[0138] Among them, SI i is the sensitivity index of the i-th factor, ΔC is the cost change caused by the change of the i-th factor, and Δx i is the change in the ith factor;

[0139] Use statistical algorithms to assess the contribution of input variables to cost variance.

[0140] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0141] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0142] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

Claims

1. A pipeline steel structure lap hanger system in-depth design method, characterized in that: The following steps are involved: S1, demand analysis, analyzing the mechanical conditions, environmental factors and pipeline use environment of the steel structure roof to determine the structural requirements of the pipeline; S2, scheme design, develop a preliminary hanger structure scheme, including structural layout and component types; S3, structural analysis, using finite element software to simulate the scheme and conduct structural mechanics analysis; S4, deepen the design, refine the hanger structure design, and design the connection nodes of the hanger components; S5, construction simulation, build a three-dimensional model of the hanger according to the in-depth design plan, and perform construction simulation, and optimize the construction of the hanger according to the construction simulation results; S6, material selection, select the materials and suppliers of the hanger components according to the design requirements, and understand the information of the materials; S7, cost budget, make cost estimates based on the structure and material selection of the hanger to understand the cost; S8, plan adjustment, adjust the selection of hanger materials according to the structure of cost budget to control costs; S9, determine the plan, based on the final material selection and final drawings; S10, construction, the staff carried out the construction of the hanger according to the optimized plan.

2. A pipeline steel structure lap hanger system in-depth design method according to claim 1, characterized in that: The step S1 specifically includes: Step S11, using sensors to detect the load and connection points of the steel structure roof and perform load analysis; Step S12, using the equipment to monitor earthquakes, groundwater levels and climate changes; Step S13, analyzing the internal load of the pipeline, including medium pressure and temperature; Step S14, collecting and analyzing data on the pipeline construction space; Step S15, based on the analysis of steps S11 to S14, design a basic treatment method for the pipeline, including structural optimization of the steel structure roof, the structure of the pipeline hanger, hoisting machinery and equipment, and construction sequence.

3. A pipeline steel structure lap hanger system in-depth design method according to claim 2, characterized in that: The step S2 specifically includes: Step S21, planning the preliminary layout of the hangers according to the direction of the pipeline and the building structure, and determining the installation position of the hangers; Step S22, calculating the weight of the pipeline and the fluid therein, including the working load and the dynamic load; Step S23, determining the spacing of the hangers according to the weight of the pipeline and the load-bearing capacity of the hangers; Step S24, determining a preliminary installation plan for the hanger according to the data of steps S21-S23; Step S25, selecting hanger components according to the installation plan, including hangers, beams, connectors, pipe clamps and vibration reduction elements.

4. A pipeline steel structure lap hanger system in-depth design method according to claim 3, characterized in that: The step S3 specifically includes: Step S31, determining the analysis direction, including the bearing capacity of the hanger structure, the stability of the hanger structure and the stress distribution of the hanger; Step S32, obtaining the design drawings, material properties and load conditions of the hanger based on the hanger layout and components of step S2; Step S33, using finite element software to build a model according to the drawings of the hanger, and dividing the model into finite element grids; Step S34, defining the properties of the hanger material in the finite element software, setting the boundary adjustment of the hanger structure for constraint, defining the load type, and applying the load to the model; Step S35, selecting a solver according to the type of analysis required to solve the model; S36, check the solution results and optimize the structure of the hanger according to the structure.

5. A pipeline steel structure lap hanger system in-depth design method according to claim 4, characterized in that: The step S4 specifically includes: Step S41, according to the hanger structure optimized in step S3, selecting the type of hanger connection node, including bolt connection and welding connection; Step S42, selecting the specification and quantity of the bolts, calculating the preload force and tensile strength of the bolts, and designing the installation method of the bolts; Step S43, selecting welding method and welding materials, calculating the strength of the welded joint, and designing the welding sequence; Step S44, using finite element software to perform stress analysis on the design of the connection node, determine the type of the node, and decide whether to add a reinforcement structure.

6. A pipeline steel structure lap hanger system in-depth design method according to claim 5, characterized in that: The step S5 specifically includes: Step S51, using the "five-step modeling method" based on BIM technology, complete the modeling of the hanger structure, including the hanger rod, beam, connector, pipe clamp and vibration reduction element, and establish the connection relationship and dependency relationship between the components; Step S52, integrating the models of the steel roof structure and the pipeline into the model of the hanger to keep the coordinates between the models unified; Step S53, defining the scope and type of collision monitoring, running the collision detection tool, and presenting the location and type of the collision in a graphical form; Step S54, assessing the severity of the conflict based on the conflict diagram and determining whether the solution needs to be adjusted; Step S55, re-performing collision detection after adjusting the scheme until no conflict occurs; Step S56, using the maintenance simulation tool to identify the complete model of the collision detection, identify the maintenance problems existing in the model, and display the location of the problem in the model; Step S57, modify the hanger plan according to the problem location until no maintenance problem occurs.

7. A pipeline steel structure lap hanger system in-depth design method according to claim 6, characterized in that: The cost analysis in step S7 is based on a cost analysis system based on big data, and uses mathematical models and solution algorithms to perform cost budget analysis and control, specifically including: Step S71, dividing the cost structure of the hanger into material cost and production cost, where the production cost includes maintenance cost, labor cost and energy cost; Step S72, collecting cost data, market price information and supplier quotation information of hangers in past projects, integrating the data and converting them into a format suitable for analysis; Step S73, using the collected data to construct a multi-factor correlation analysis mathematical model for the hanger material cost, using a correlation algorithm to analyze the correlation between the hanger material cost and multiple factors, and analyzing the cost influencing factors and their degree of influence; Step S74, using the collected data to construct a hanger material cost analysis model based on the big data mining technology of the hanger material cost and the coupling of the statistical method, and performing a multi-dimensional analysis of the hanger material cost according to the material category, specification, and supplier; Step S75, formulate a construction cost budget according to the hanger material cost information in the model.

8. A pipeline steel structure lap hanger system in-depth design method according to claim 7, characterized in that: The step S8 specifically includes: Step S81, using historical cost data and market trends, find the difference between actual cost and cost budget and determine the factors causing the cost difference; Step S82, evaluating the impact of different cost factors on the total cost, analyzing the distribution of cost differences on different cost components, and determining which parts have the greatest impact on the total cost; Step S83, optimizing the design solution, communicating with suppliers about prices or using alternative materials with lower costs; Step S84, tracking the actual cost and predicting the trend of future hanger material cost by using Monte Carlo simulation method; Step S85, conduct sensitivity analysis on the forecast results, sort the sensitivity of cost factors, and adjust the project budget.

9. A pipeline steel structure lap hanger system in-depth design method according to claim 8, characterized in that: The step S9 specifically includes: Step S91, summarizing the costs based on the final material selection and drawings, conducting a risk assessment on the costs, and formulating corresponding risk response strategies; Step S92: Submit the plan to the management for approval, integrate the approval opinions, make necessary modifications, and review the modified plan again; Step S93, confirm the final cost budget, design plan and construction plan after all approvals and modifications are completed.

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