CN102968518A - Topology optimization design method for novel down-the-hole arc-shaped hydraulic steel gate - Google Patents
Topology optimization design method for novel down-the-hole arc-shaped hydraulic steel gate Download PDFInfo
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- CN102968518A CN102968518A CN2012103748960A CN201210374896A CN102968518A CN 102968518 A CN102968518 A CN 102968518A CN 2012103748960 A CN2012103748960 A CN 2012103748960A CN 201210374896 A CN201210374896 A CN 201210374896A CN 102968518 A CN102968518 A CN 102968518A
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Abstract
The invention discloses a design method based on topology optimization for a novel down-the-hole arc-shaped hydraulic steel gate. The design method comprises the steps of: design of support arms: determining the position of the center of the main support arm relative to vertical symmetric surfaces of a water retaining surfacedeck; topology optimization: to obtain the layout of vertical ribs in a support framework; determination of a new design area and topology optimization to obtain the layout of horizontal ribs in the support framework; construction of the overall structure of the down-the-hole steel gate, and dimensional optimization; and safety check of the structure under other conditions. On the premises of satisfying force-bearing requirements and reducing the dead weight of the structure, the optimal topology of the structural layout can be realized. Large-size two/three-dimensional design of the structure can be performed while actual engineering conditions are satisfied, and the spatial layout is reasonable. Compared with the traditional design, the designed novel gate has the advantages of low material consumption and light dead weight.
Description
Technical field
The present invention relates to the Optimization Design of gate in a kind of hydraulic engineering, more particularly, relate to a kind of novel down-the-hole type arc hydraulic steel gate method of topological optimization design.
Background technology
Compare with plane steel gate, steel arch-gate opens and closes laborsaving, and running is reliable, and easy to operate, the earial drainage condition is good, and along with the development of water resources and hydropower construction cause, steel arch-gate is widely used.
Steel arch-gate is divided into extended-top type and down-the-hole type according to the degree of depth that door pushes up above water level, and at present, the design of down-the-hole type gates of segmental shape combines according to early stage design specifications and experience and implementing.According to Practical Project condition and designer's Experience Design primary election gate structure, then carry out the verification of structural strength rigidity stability.Minority can utilize the Space finite element method that the gate rationality is carried out verification.As verify to calculate and satisfy initial designs, then make; Do not make amendment again if do not satisfy.The result who obtains, meeting the demands but is difficult to reach optimum usually.
Along with the development of computer technology and the application of concept of optimization, domestic had many scholars that its optimal design is studied and attempts.These job guides production practices, but it mainly carries out the dimensionally-optimised topological optimization that does not relate to structure to existing design proposal.
For most of engineerings, it is that basic engineering is calculated that the traditional design step still relies on traditional plane system theory, the down-the-hole type steel arch-gate structure that designs is relatively large, causes the wasting of resources and margin of safety too high, and structure is relatively large, deadweight is large, resource consumption is many.
Summary of the invention
For overcoming the problems referred to above, the invention provides a kind of novel down-the-hole type arc hydraulic steel gate method of topological optimization design.In the situation of engineering demands, relatively and traditional design, can reduce project cost, alleviate the dead load moulding of optimizing structure.
For achieving the above object, the invention provides following technical scheme:
A kind of novel down-the-hole type arc hydraulic steel gate method of topological optimization design may further comprise the steps:
A) design proposal of support arm is determined the position of the vertical plane of symmetry of main support arm centre distance water retaining facing;
B) the topological optimization layout of longitudinal rib in the framework that is supported;
C) determine new design domain, the be supported layout of cross rib in the framework of topological optimization;
D) one-piece construction of structure down-the-hole type steel gate and do dimensionally-optimised;
E) structural safety under other operating modes is checked.
Preferably, in above-mentioned Optimization Design, involved modeling, pre-treatment, Optimization Software are hyperworks software.
The invention has the beneficial effects as follows that can carry out the two-dimentional three-dimensional design of large volume in the situation that satisfies the Practical Project condition to structure, space layout is reasonable, the Novel gate that designs is few than the traditional design material usage, from heavy and light.
Description of drawings
For the clearer explanation embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is definite synoptic diagram of support arm position.
Fig. 2 is main support arm longitudinal profile initial designs domain model figure.
Fig. 3 is figure as a result behind the topological optimization of main support arm longitudinal profile.
Fig. 4 is that the rear as a result figure of correction is optimized in main support arm longitudinal profile.
Fig. 5 is longitudinal rib initial designs domain model figure.
Fig. 6 is as a result figure of longitudinal rib topological optimization.
Fig. 7 is longitudinal rib layout after revising.
Fig. 8 is cross rib initial designs domain model figure.
Fig. 9 is as a result figure of cross rib topology.
Figure 10 is cross rib final layout figure.
Figure 11 is novel down-the-hole type steel arch-gate one-piece construction figure behind the topological optimization.
Embodiment
The invention discloses a kind of method of topological optimization design for down-the-hole type arc hydraulic steel gate, to seek optimal design, reduce project cost.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is known intactly description.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Method of topological optimization design for down-the-hole type arc hydraulic steel gate provided by the present invention may further comprise the steps:
1. obtain initial conditions from actual engineering design;
2. determine the position of the vertical plane of symmetry of main support arm centre distance water retaining facing according to the design initial conditions; Create the geometric model (fan-shaped) of the two-dimensional design at main support arm place by modeling software, the arc radius of sector is work arc door radius, and (what example of the present invention used is Hypermesh software, certainly also can use other modeling softwares, as long as can create out cad model);
3. model is carried out pre-treatment, set up finite element model (what example of the present invention used is Hypermesh software, certainly also can use other CAE pre-processing softwares, divides as long as cad model can be carried out grid);
4. determine the scope of the interior design domain of sector region and non-design domain; The thickness of non-design domain is comprised of the thickness of water retaining facing and the thickness of stiffening rib, and estimation gets according to formula;
5. load application is condensing to two-dimentional border with three-dimensional load;
6. determine that optimization aim and constraint condition are optimized (what example of the present invention used is Hyperworks software, certainly also can use other Optimization Softwares, as long as can be met the topology that has most of constraint condition);
7. obtain the two-dimensional topology optimum results and revise the extraction border;
8. water retaining facing is set as non-design domain, determines that optimization aim and constraint condition carries out topological optimization, obtain the placement scheme of longitudinal rib;
9. determine the initial designs territory of cross rib topological optimization, in order to reduce calculated amount, support arm place Non-design region removed that intersection replaces the fixed displacement constraint; Water retaining facing is set as non-design domain, determines that optimization aim and constraint condition carries out topological optimization, obtain the placement scheme of cross rib;
10. set up structure initial designs model according to the section layout scheme of distributed topology optimum results;
11. carry out dimensionally-optimised to whole three-dimensional structure;
12. the safety of structure under other operating modes is checked, and carries out on demand part adjustment; Finish final design output.
In sum, the present invention adopts the structural Topology Optimization method to replace the method for designing of traditional standard experience combination in the design of down-the-hole type arc hydraulic steel gate.So not only improve the rationality of topology layout, and shortened the design cycle, saved cost of development.
The below is arranged as example with some hydropower station spillway work arc door, and introduces the inventive method is carried out topological optimization to gate design process by accompanying drawing.
See also Fig. 1, Fig. 1 is definite synoptic diagram of support arm position, according to the deformation analysis of mechanics of materials central sill as can be known, the length of making distance center (
) account for overall length (
) 0.293, determine the position of support arm.
In embodiment illustrated in fig. 2, (1) is non-design domain, and (non-design domain is according to estimation equation to be not counted in calculating
Draw, wherein
Span [10 20]; L is the water retaining facing span; D is the support arm plate thickness;
T O Be the water retaining facing original depth, calculate that non-design domain thickness is 1800mm in the two-dimentional initial designs); (2) be design domain.Concentrated force p and evenly load q all act on the non-design domain.
Figure as a result behind the topological optimization of Fig. 3 master's support arm longitudinal profile, optimization problem is take structure flexibility minimum as target, and constraint condition is volume constraint, and volume accounts for cumulative volume 15% after namely optimizing.
Fig. 4 is as a result figure of revised main support arm configurations.
In Fig. 5, the non-design domain thickness range of getting last suboptimization is new optimization zone, for guarantee and the support arm coupling part accurate, get the zone greater than non-design domain thickness 200mm, carry out topological optimization.Panel is set to non-design domain, replaces with displacement constraint with the coupling part of support arm, and the optimization aim function is that the structure flexibility is minimum, and volume constraint is volume ratio 15%.Obtain as a result Fig. 6 of topological optimization after the optimization.According to can the manufacturing type etc. rational deployment, obtain final longitudinal rib placement scheme such as Fig. 7.
In Fig. 8, go non-design domain calculating cross rib distribution among Fig. 2, plate thickness (2) is as non-design domain, all the other are design domain (1), replace with displacement constraint (3) with the coupling part of support arm, optimization aim is that the structure flexibility is minimum, volume constraint 15%, Fig. 9 is the topological optimization result, and Figure 10 is final cross rib distribution scheme.
Figure 11 has showed the preliminary structure design of the novel down-the-hole type arc hydraulic steel gate integral body that obtains according to Topology Optimization Method.End-results carries out dimensionally-optimised, considers intensity, rigidity, flexing and natural frequency of vibration constraint.Draw the thickness of final each parts.
Claims (5)
1. the method for topological optimization design of a novel down-the-hole type allotment arm arc hydraulic steel gate is characterized in that, comprises step:
Obtain initial conditions from actual engineering design;
Determine the position of the vertical plane of symmetry of main support arm centre distance water retaining facing according to the design initial conditions; Create the geometric model (fan-shaped) of the two-dimensional design at main support arm place by modeling software, the arc radius of sector is work arc door radius;
Model is carried out pre-treatment, set up finite element model;
Determine the scope of the interior design domain of sector region and non-design domain; The thickness of non-design domain is comprised of the thickness of water retaining facing and the thickness of stiffening rib, and estimation gets according to formula;
Load application, three-dimensional load is condensing to two-dimentional border;
Determine that optimization aim and constraint condition are optimized;
Obtain the two-dimensional topology optimum results and revise the extraction border;
Water retaining facing is set as non-design domain, determines that optimization aim and constraint condition carries out topological optimization, obtain the placement scheme of longitudinal rib;
Determine the initial designs territory of cross rib topological optimization, in order to reduce calculated amount, support arm place Non-design region removed that intersection replaces the fixed displacement constraint; Water retaining facing is set as non-design domain, determines that optimization aim and constraint condition carries out topological optimization, obtain the placement scheme of cross rib;
Set up structure initial designs model according to the section layout scheme of distributed topology optimum results;
Carry out dimensionally-optimised to whole three-dimensional structure;
Safety of structure under other operating modes is checked, and carries out on demand part adjustment; Finish final design output.
2. Optimization Design as claimed in claim 1 is characterized in that, described modeling and pre-processing software are the submodule hypermesh under the hyperworks software.
3. Optimization Design as claimed in claim 1 is characterized in that, the optistruct solver under the described Topology Optimization Method application software hyperworks software.
4. Optimization Design as claimed in claim 1 is characterized in that, steps d) in described non-design domain
Definite method be
5. Optimization Design as claimed in claim 1 is characterized in that, step e) described in load and the load of edge-restraint condition when being specially the structural assembly actual experiment and the degree of freedom of some parts.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955879A (en) * | 2012-10-09 | 2013-03-06 | 蔡坤 | Optimal design method of top-emerged arc-shaped hydraulic steel gate based on SIMP (Solid Isotropic Material with Penalization) theory |
| CN103226640A (en) * | 2013-05-08 | 2013-07-31 | 蔡坤 | Design method for longspan steel arch-gate containing fork type supporting arm based on SIMP theory |
| CN103473414A (en) * | 2013-09-11 | 2013-12-25 | 中国十九冶集团有限公司 | Engineering construction simulation method |
| CN103514335A (en) * | 2013-10-17 | 2014-01-15 | 蔡坤 | Molecular domain composite foundation pile arrangement design method based on topological optimization theory |
| CN105756020A (en) * | 2016-05-03 | 2016-07-13 | 西北农林科技大学 | Concise chart method for reasonable arrangement of supporting arm in longitudinal framework of arc-shaped steel gate |
| CN111008354A (en) * | 2019-12-13 | 2020-04-14 | 中国电建集团中南勘测设计研究院有限公司 | Radial gate gravity center calculation method and gravity moment calculation method |
| CN112064597A (en) * | 2020-09-01 | 2020-12-11 | 中电建十一局工程有限公司 | Method for arranging three-fork inclined support arm rear end plate by using projection line vertical plane of middle support arm |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955879A (en) * | 2012-10-09 | 2013-03-06 | 蔡坤 | Optimal design method of top-emerged arc-shaped hydraulic steel gate based on SIMP (Solid Isotropic Material with Penalization) theory |
| CN103226640A (en) * | 2013-05-08 | 2013-07-31 | 蔡坤 | Design method for longspan steel arch-gate containing fork type supporting arm based on SIMP theory |
| CN103473414A (en) * | 2013-09-11 | 2013-12-25 | 中国十九冶集团有限公司 | Engineering construction simulation method |
| CN103514335A (en) * | 2013-10-17 | 2014-01-15 | 蔡坤 | Molecular domain composite foundation pile arrangement design method based on topological optimization theory |
| CN103514335B (en) * | 2013-10-17 | 2016-08-17 | 蔡坤 | Molecule territory based on Topology Optimization Theory composite foundation lays out pile method for designing |
| CN105756020A (en) * | 2016-05-03 | 2016-07-13 | 西北农林科技大学 | Concise chart method for reasonable arrangement of supporting arm in longitudinal framework of arc-shaped steel gate |
| CN111008354A (en) * | 2019-12-13 | 2020-04-14 | 中国电建集团中南勘测设计研究院有限公司 | Radial gate gravity center calculation method and gravity moment calculation method |
| CN111008354B (en) * | 2019-12-13 | 2023-04-18 | 中国电建集团中南勘测设计研究院有限公司 | Radial gate gravity center calculation method and gravity moment calculation method |
| CN112064597A (en) * | 2020-09-01 | 2020-12-11 | 中电建十一局工程有限公司 | Method for arranging three-fork inclined support arm rear end plate by using projection line vertical plane of middle support arm |
| CN112064597B (en) * | 2020-09-01 | 2021-10-08 | 中电建十一局工程有限公司 | Method for arranging three-fork inclined support arm rear end plate by using projection line vertical plane of middle support arm |
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Application publication date: 20130313 |