CN104408216B - A kind of optimization method of pipe vibration-damping - Google Patents
A kind of optimization method of pipe vibration-damping Download PDFInfo
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Abstract
The invention is related to a kind of optimization method of pipe vibration-damping, and its step includes：Establish pipeline model to be optimized, pipeline model is imported in optimization software, model analysis pattern and static analysis model-based optimization are carried out in optimization software, model analysis mode computation result is the new pipeline model after the frequency values of the mode of oscillation of pipeline model and structure optimization, the frequency values of the rank mode of oscillation of pipeline model is both greater than the maximum for transporting frequency；Static analysis mode computation result is the new pipeline model after the stress envelope of pipeline model and structure optimization, stress maximum in the stress envelope of pipeline model is less than the fatigue limit value of pipeline.Pipeline resonance during equipment conveying can not only be avoided using the optimization method of the invention, reduce pipe stress during equipment operation, and the pipeline model after Optimal improvements can directly be detected, without process costs, mockup is not required to be detected, production cost is saved, shortens the construction cycle, improves efficiency of research and development.
Description
Technical field
The invention is related to pipe vibration-damping technical field, and in particular to a kind of optimization method of pipe vibration-damping.
Background technology
The pipeline of numerous commissures is both provided with general home appliance or electric equipment, in body, these pipelines by
It is not high in the intensity of itself, and the free degree is more, is easier to vibrate relative to the miscellaneous part in body, especially this
A little pipelines can produce vibration in transportation due to the exciting such as means of transport or road conditions factor, in addition, pipeline is transported in equipment
Also due to vibration source in it during row（Such as motor, fan etc.）Exciting and produce forced vibration, these vibrations are equal
The degree of fatigue of pipeline can be aggravated, reduce the service life of pipeline, especially when intrinsic frequency of the excited frequency close to pipeline,
Resonance can be induced, further increases the endurance failure degree of pipeline, has a strong impact on the running quality of equipment.Pipe vibration not only makes
Pipeline fatiguability is damaged, and vibrates and can produce huge noise, the substantial amounts of energy of loss, or even vibration is set it is also possible to causing
Standby deformation, therefore, the research for how reducing pipe vibration receive much concern.
In current pipeline configuration design, mainly pipe vibration is reduced using two methods：First method is logical
Cross and add Damping modules in the outside of pipeline（Such as shock absorber, damper valve, damping block etc.）Although this method can directly reach
To the effect of vibration damping, but extra material cost and technique assembly cost being added, economic benefit is low, and due to reality
Middle pipeline is complicated, and the Damping modules of additional can increase the volume of equipment, further increase production cost；Second
Method be technical staff according to having there is experience, produce a variety of model machines with different pipeline configurations, then vibrated respectively
Simulation trafficking experiments and operational shock test experiments on platform, measure the parameter for being capable of reacting pipe performance（Failure period, should
Power, displacement etc.）, then continue to test to readjust pipeline configuration according to the parameter of these measurements, in this way
Need to manufacture substantial amounts of model machine, increase production cost, and cause a large amount of wastes of unqualified model machine, while testing efficiency is low, increases
The R＆D cycle is grown.
The content of the invention
The purpose of the invention is to avoid above-mentioned weak point of the prior art and provide a kind of pipe vibration-damping
Optimization method, the optimization method can significantly reduce pipe vibration, avoid pipeline from resonating, and use optimization method letter
It is single, conveniently, cost is low, occupy little space, optimization efficiency is high, R＆D costs can be saved and shorten the R＆D cycle.
The purpose of the invention is achieved through the following technical solutions：
Provide a kind of optimization method of pipe vibration-damping, it is characterised in that：Comprise the following steps：
（1）Pipeline model is established using modeling software for pipeline to be optimized；
（2）The pipeline model established is imported in ABAQUSE softwares, and mesh generation is carried out to pipeline model；
（3）In ABAQUSE softwares, boundary constraint and the physical parameter of pipeline model are set, wherein, boundary constraint includes
Built-in boundary, incomplete built-in boundary connect with component, and physical parameter includes the material property of pipeline model, density, Yang Shimo
Amount and Poisson's ratio；
（4）Pipeline model meets optimization during equipment conveying condition, operating procedure（6）And step（7）Optimize calculating；
Pipeline model meets optimization during equipment service condition, operating procedure（8）And step（9）Optimize calculating；
（5）Pipeline model had not only met equipment conveying condition but also had met the optimization of equipment operation, to former pipeline mould to be optimized
Type operating procedure（6）And step（7）Optimize and the new pipeline model for meeting equipment conveying condition is calculated, then using step
Suddenly（7）Resulting new pipeline model operating procedure（8）And step（9）If through step（9）The stress of pipeline model is calculated
Maximum stress value is more than the fatigue limit value of pipeline in distribution map, then to step（9）The new pipeline model of middle gained carries out step
（2）、（3）、（8）With（9）Calculating is optimized again, if through step（9）Calculate in the stress envelope of gained pipeline model most
Big stress value is less than the fatigue limit value of pipeline, then resulting pipeline model is then to meet two kinds of conditions of equipment conveying and operation
The pipeline model of lower design.
（6）Calculating, model analysis pattern are optimized to pipeline model using the model analysis pattern in ABAQUSE softwares
Including frequency analysis module, shape optimum module and iterative calculation module, wherein, set expectation to obtain in frequency analysis module
Pipeline model mode of oscillation exponent number n, 1≤n≤20, in module is iterated to calculate set iterations t, 0≤t≤30；
（7）After model analysis model-based optimization result of calculation is the frequency values of the mode of oscillation of pipeline model and structure optimization
New pipeline model, according to step（6）In mode of oscillation exponent number n setting, accordingly, can obtain the preceding n ranks of pipeline model
The frequency values of mode of oscillation, if the frequency values of preceding n ranks mode of oscillation are both greater than the maximum for transporting frequency, after structure optimization
New pipeline model then meets traffic condition；If the frequency values of preceding n ranks mode of oscillation are not more than the maximum of transport frequency all,
Provide the displacement of the pipeline model corresponding to the frequency values for the rank mode of oscillation that these frequency values are less than the maximum for transporting frequency
Distribution map, boundary constraint, return to step are carried out in new pipeline model to the maximum point of shift value in displacement distribution map（2）、
（3）、（6）With（7）Calculating is optimized again, until the frequency values of the rank mode of oscillation of gained pipeline model both greater than transport frequency
The maximum of rate, now, resulting pipeline model are then the pipeline model for meeting equipment conveying design；
（8）Calculating, static analysis pattern are optimized to pipeline model using the static analysis pattern in ABAQUSE softwares
Including static analysis module, shape optimum module and iterative calculation module, wherein, iterations is set in module is iterated to calculate
t, 0≤t≤30；
（9）Static analysis model-based optimization result of calculation is the new pipeline after the stress envelope of pipeline model and structure optimization
Model, if maximum stress value is less than the fatigue limit value of pipeline in the stress envelope of pipeline model, resulting structure is excellent
New pipeline model after change meets equipment service condition；If maximum stress value is more than or equal in the stress envelope of pipeline model
The fatigue limit value of pipeline, then step is carried out to the new pipeline model of gained（2）、（3）、（8）With（9）Meter is optimized again
Calculate, if through step（9）Calculate, then maximum stress value is less than the fatigue limit of pipeline in the stress envelope of gained pipeline model
Value, now, resulting pipeline model are then to meet the pipeline model needed for equipment operating energy loss.
Further, step（6）In, linear perturbation submodule, the vibration of pipeline model are set in frequency analysis module
Mode is arranged to 15 ranks, and iterations is arranged to 10 times.
Further, step（6）With（8）Middle iterative calculation module uses the geometry pair of circular tube shaped in iterative calculation
The network of pipeline model is fitted, and approximating method is least square method.
Further, step（8）In, iterations is arranged to 10 times.
Further, step（2）In, pipeline model needs to generate SAT file formats before ABAQUSE softwares are imported.
Further, it is 2~50 Hz to transport frequency.
The beneficial effect of the invention：
The optimization method of the pipe vibration-damping of the invention, using the optimization method of the invention by iterating to calculate mould
Block in model analysis model-based optimization, can make the rank mode of oscillation of the new pipeline after optimization with the structure of Automatic Optimal pipeline
Frequency values are both greater than the maximum for transporting frequency, and then avoid the resonance for causing pipeline during equipment conveying condition, so as to reduce pipe
The endurance failure in road, in addition, in static analysis model-based optimization, the new pipe that optimizes to obtain using the optimization method of the invention
The maximum stress value in road is less than the fatigue limit value of pipeline, avoids equipment from increasing the stress degree of pipeline when running, and then reduce
The fatigue strength of pipeline；Simple, conveniently using the optimization method of the invention, optimization efficiency is high, can be to the pipeline mould after optimization
Type is directly detected, and without increasing process costs, is also not required to produce model machine and is detected, save production cost, shortens
Construction cycle, improve efficiency of research and development.
Brief description of the drawings
Innovation and creation are described further using accompanying drawing, but the embodiment in accompanying drawing does not form and the invention is appointed
What is limited, on the premise of not paying creative work, can also be according to the following drawings for one of ordinary skill in the art
Obtain other accompanying drawings.
Fig. 1 is the structural representation of the pipeline model of the invention.
Fig. 2 is the structural representation after the pipeline model mesh generation of the invention.
Fig. 3 is the displacement of the preceding single order mode of oscillation of the mode automatically optimized middle pipeline model of the model analysis of the invention
Distribution map.
Fig. 4 is the displacement of the preceding second order mode of oscillation of the mode automatically optimized middle pipeline model of the model analysis of the invention
Distribution map.
Fig. 5 is the displacement of first three rank mode of oscillation of the mode automatically optimized middle pipeline model of the model analysis of the invention
Distribution map.
Fig. 6 is the displacement of the preceding quadravalence mode of oscillation of the mode automatically optimized middle pipeline model of the model analysis of the invention
Distribution map.
Fig. 7 is the stress envelope of the pipeline model before the static analysis model-based optimization of the invention.
Fig. 8 is the stress envelope of the pipeline model after the static analysis model-based optimization of the invention.
Reference：
1-A branch pipe(tube)s,
2-B branch pipe(tube)s,
3-C branch pipe(tube)s,
4-D branch pipe(tube)s,
5- main pipelines.
Embodiment
The invention is further described with the following Examples.
A kind of optimization method of pipe vibration-damping of the invention, comprises the following steps：
（1）Pipeline model is established using modeling software for pipeline to be optimized, modeling software is preferably Solid
Edger, pipeline model is established using Solid Edger, as shown in Fig. 1, pipeline model includes a main pipeline 5 and multiple
Pipeline, the Single port of multiple branch pipe(tube)s are all connected on main pipeline, it is preferred that branch pipe(tube) is four, respectively A branch pipe(tube)s 1, B
Branch pipe(tube) 2, C branch pipe(tube)s 3, D branch pipe(tube)s 4, another port A ', B ', C ', the D ' of four branch pipe(tube)s are the freedom for treating boundary constraint
End.
（2）By step（1）In the pipeline model built up import in ABAQUSE softwares, and grid is carried out to pipeline model
Division, wherein, imported after pipeline model is generated into SAT file formats in ABAQUSE softwares, grid then is carried out to pipeline model
Division, using free mesh form, grid is shaped as tetrahedron, and grid cell type is C3D10, the grid of initialization
Seed overall situation size is 0.004, and it is 8 often to enclose most grid seeds, and minimum grid sets 10% not less than characteristic length, grid
After division as shown in Figure 2.
（3）In optimization software, boundary constraint and the physical parameter of pipeline model are set, wherein, boundary constraint includes solid
Branch border, incomplete built-in boundary connect with component, and physical parameter includes the material property of pipeline model, density, yang type modulus
And Poisson's ratio, further, pipe material elects red copper as, calculates density and is set to 8.94 × 103kg/m3, yang type modulus, Poisson's ratio
Average value 117.5Gpa, 0.325 is respectively adopted.
（4）Pipeline model meets optimization during equipment conveying condition, operating procedure（6）And step（7）Optimize calculating；
Pipeline model meets optimization during equipment service condition, operating procedure（8）And step（9）Optimize calculating.
（5）Pipeline model had not only met equipment conveying condition but also had met the optimization of equipment operation, to former pipeline mould to be optimized
Type operating procedure（6）And step（7）Optimize and the new pipeline model for meeting equipment conveying condition is calculated, then using step
Suddenly（7）Resulting new pipeline model operating procedure（8）And step（9）If through step（9）The stress of pipeline model is calculated
Maximum stress value is more than the fatigue limit value of pipeline in distribution map, then to step（9）The new pipeline model of middle gained carries out step
（2）、（3）、（8）With（9）Calculating is optimized again, if through step（9）Calculate in the stress envelope of gained pipeline model most
Big stress value is less than the fatigue limit value of pipeline, then resulting pipeline model is then to meet two kinds of conditions of equipment conveying and operation
The pipeline model of lower design.
（6）Calculating, model analysis pattern are optimized to pipeline model using the model analysis pattern in ABAQUSE softwares
Including frequency analysis module, shape optimum module and iterative calculation module, wherein, set expectation to obtain in frequency analysis module
Pipeline model mode of oscillation exponent number n, 1≤n≤20, in module is iterated to calculate set iterations t, 0≤t≤30.
（7）After model analysis model-based optimization result of calculation is the frequency values of the mode of oscillation of pipeline model and structure optimization
New pipeline model, according to step（6）In mode of oscillation exponent number n setting, accordingly, can obtain the preceding n ranks of pipeline model
The frequency values of mode of oscillation, if the frequency values of preceding n ranks mode of oscillation are both greater than the maximum for transporting frequency, after structure optimization
New pipeline model then meets traffic condition；If the frequency values of preceding n ranks mode of oscillation are not more than the maximum of transport frequency all,
Provide the displacement of the pipeline model corresponding to the frequency values for the rank mode of oscillation that these frequency values are less than the maximum for transporting frequency
Distribution map, boundary constraint, return to step are carried out in new pipeline model to the maximum point of shift value in displacement distribution map（2）、
（3）、（6）With（7）Calculating is optimized again, until the frequency values of the rank mode of oscillation of gained pipeline model both greater than transport frequency
The maximum of rate, now, resulting pipeline model are then the pipeline model for meeting equipment conveying design.
（8）Calculating, static analysis pattern are optimized to pipeline model using the static analysis pattern in ABAQUSE softwares
Including static analysis module, shape optimum module and iterative calculation module, wherein, iterations is set in module is iterated to calculate
t, 0≤t≤30。
（9）Static analysis model-based optimization result of calculation is the new pipeline after the stress envelope of pipeline model and structure optimization
Model, if maximum stress value is less than the fatigue limit value of pipeline in the stress envelope of pipeline model, resulting structure is excellent
New pipeline model after change meets equipment service condition；If maximum stress value is more than or equal in the stress envelope of pipeline model
The fatigue limit value of pipeline, then step is carried out to the new pipeline model of gained（2）、（3）、（8）With（9）Meter is optimized again
Calculate, until maximum stress value is less than the fatigue limit value of pipeline in the stress envelope of gained pipeline model, it is now, resulting
Pipeline model is then to meet the pipeline model needed for equipment operating energy loss.
When pipeline model is in equipment conveying condition, pipeline model is carried out using the model analysis pattern in optimization software
Optimization calculates, and model analysis pattern includes frequency analysis module, shape optimum module and iterative calculation module, wherein, in frequency
The exponent number that desired pipeline model mode of oscillation is set in analysis module is 15 ranks, and iteration is set in module is iterated to calculate
Number, computing is iterated using 23 motion vectors every time, iterative calculation module is in iterative calculation using the several of circular tube shaped
What structure is fitted to the network of pipeline model, and approximating method is least square method.Model analysis pattern uses frequency
Linear perturbation submodule in analysis module, the general equation formula of the dynamic characteristic of model analysis pattern are：
Wherein, [M] is mass matrix in aforesaid equation, and [K] even rigidity matrix, { x } is displacement array, and [M] and [K] is equal
For n × n rank square formations, { x } is the rank array of n × 1., can be to collection location coordinate { x } table using linear transform { x }=[u] { y }
The coupled system differential equation group decoupling shown.To solve above-mentioned equation, it is assumed that the vibration of pipeline model is the letter by frequency
Harmonic motion forms, if { X } is the displacement amplitude and amplitude array or amplitude vecotr of { x },φFor initial phase, then pipeline model motion
Equation is：{x}={X}sin(ω n t+φ), substituted into aforesaid equation, arrange the obtained feature square of pipeline model
Battle array equation be：
Because the damping of structure is to its modal frequency and the influence very little of the vibration shape, so the essence of model analysis pattern is exactly
Solve in undamped and no load state following formula with the limited individual free degree.
Before pipeline model optimization, analysis calculating is carried out using model analysis pattern, sets iterations to be arranged to 0 time, is counted
Frequency values of the result for the preceding 15 rank mode of oscillation of pipeline model are calculated, the frequency of the first eight rank mode of oscillation is listed from result of calculation
Value is analyzed, the frequency values of the mode of oscillation before optimization as shown in table 1, in the frequency values of this first eight rank mode of oscillation before
The frequency values of quadravalence mode of oscillation are in transport frequency（2~50 Hz）In the range of, thus this quadravalence vibrates in equipment conveying
Mode may trigger the resonance of pipeline, and then may aggravate the degree of fatigue of pipeline, therefore, for avoid pipeline resonate, it is necessary to
Structure optimization is carried out to pipeline model, the minimum vibration frequency of pipeline model is reached maximization, is preceding 1 rank of pipeline model
Frequency reaches maximization.
Pipeline model automatic structure optimizes, and carries out analysis calculating using model analysis pattern, sets iterations to be arranged to
10 times, result of calculation is the new pipeline model after the frequency values of the preceding 15 rank mode of oscillation of pipeline model and structure optimization, new pipe
A branch pipe(tube)s 1 and the caliber of the junction of main pipeline 5 diminish compared with the pipeline model before optimization in road model.Equally from result of calculation
The frequency values for listing the first eight rank mode of oscillation are analyzed, the frequency values in Automatic Optimal as shown in table 1, Automatic Optimal
In the frequency values of the first eight rank mode of oscillation be significantly greater than the frequency values before corresponding optimization, still, in Automatic Optimal
The frequency values of preceding quadravalence mode of oscillation also fall in the range of the Hz of maximum 50 of transport frequency, when still may cause transport
The resonance of pipeline, it is therefore desirable to further optimized to pipeline model, at this point it is possible to by the new pipe after structure Automatic Optimal
Road return to step（2）、（3）、（6）With（7）Calculating is optimized again, makes the minimum vibration modal frequency value of pipeline tend to most
Greatly, but needs are substantial amounts of to be calculated because pipeline model freely optimizes, and to improve optimization efficiency, restrained boundary is used to pipeline model
Optimization.
Pipeline model is optimized using restrained boundary, further provides shaking for the preceding quadravalence in above-mentioned Automatic Optimal result of calculation
The Displacements Distribution figure of pipeline model corresponding to the frequency values of dynamic model state, as shown in Figures 3 to 6, can be with from Displacements Distribution figure
Directly find out that the shift value at the bent angle E of A branch pipe(tube)s 1 and at the bent angle F of B branch pipe(tube)s 2 is maximum, at bent angle E and at bent angle F
Built-in boundary constraint is carried out, other specification is identical with above-mentioned Automatic Optimal model analysis, optimizes mode mode computation again.
Result of calculation is the new pipeline model after the frequency values of preceding 15 rank mode of oscillation and structure optimization, equally selects the first eight rank to vibrate mould
The frequency values of state are analyzed, the frequency values of constrained optimization as shown in table 1, are carried out pair with Automatic Optimal result of calculation
Than, it is known that whole order frequency values in constrained optimization result of calculation are all higher than transporting 50 HE of frequency, and then ensure that pipeline is being set
Received shipment will not produce resonance when defeated.
The front and rear modal analysis result three times of optimization is shown in Table 1：
Can be with the structure of Automatic Optimal pipeline, in mode by iterating to calculate module using the optimization method of the invention
In analytical model optimization, the frequency values of the rank mode of oscillation of the new pipeline after optimization is both greater than the maximum for transporting frequency, enter
And the resonance for causing pipeline during equipment conveying condition is avoided, so as to reduce the endurance failure of pipeline, use the excellent of the invention
Simply, conveniently, optimization efficiency is high, and the pipeline model after optimization directly can be detected for change method, without increasing process costs,
Also it is not required to produce model machine and is detected, saves production cost, shorten the construction cycle, improve efficiency of research and development.
When pipeline model is in equipment service condition, pipeline model is carried out using the static analysis pattern in optimization software
Optimization calculates, and static analysis pattern includes static analysis module, shape optimum module and iterative calculation module, wherein, in iteration
Iterations is set in computing module.Because pipeline model is connected with the vibration source in equipment, in equipment operationally, pipeline mould
Type makees forced vibration, and the equation of motion of forced vibration is：
For wherein f to be forced to power, the power that is forced to of pipeline model mostlys come from vibration source in equipment（Such as compress mechanical, electrical
Machine, fan etc.）.
In static analysis pattern, boundary constraint is to apply displacement load at port A ' places, and its displacement maximum is（60,
70,70）Um, built-in boundary is disposed as at port B ', C ', D ' place.
Before pipeline model optimization, calculated using static analysis pattern analysis, iterations is arranged to 0 time, static analysis mould
Formula optimization result of calculation is the stress envelope of pipeline model, and the stress envelope of pipeline model is as shown in fig. 7, can from Fig. 7
Directly to find out maximum stress as 1.548Mpa, stress is concentrated mainly at the bent angle E of A branch pipe(tube)s 1.
Pipeline model is optimized, calculated using static analysis pattern analysis, iterations is arranged to 10 times, calculates knot
Fruit for pipeline model stress envelope and structure optimization after new pipeline model, stress envelope such as Fig. 8 institutes of pipeline model
Show, although as can be seen that the main concentrated area of stress is not relative to having great change, maximum stress before optimization from Fig. 8
Value is only 1.295Mpa, and relative to the 1.548Mpa before optimization, stress reduces 15%, and substantially reduce that pipeline born should
Power；Arc radius increase of the new pipeline model at the bent angle E of A branch pipe(tube)s 1 after structure optimization, play the work of dispersive stress
With.If the maximum stress of pipeline model is also greater than the fatigue limit value of pipeline, step is carried out to the new pipeline model of gained
（2）、（3）、（8）With（9）Calculating is optimized again, until maximum stress value is less than in the stress envelope of gained pipeline model
The fatigue limit value of pipeline.
In static analysis model-based optimization, the maximum for the new pipeline for optimizing to obtain using the optimization method of the invention should
Force value is less than the fatigue limit value of pipeline, avoids equipment from increasing the stress degree of pipeline when running, and then reduce the fatigue of pipeline
Degree.
Pipeline model meets the optimization under the conditions of two kinds of equipment conveying and operation, step（8）In pipeline model using step
Suddenly（7）Pipeline model after middle structure optimization, if through step（9）Maximum stress in the stress envelope of pipeline model is calculated
Value is more than the fatigue limit value of pipeline, then to step（9）The new pipeline model of middle gained carries out step（（2）、（3）、（8）With（9）
Calculating is optimized again, until maximum stress value is less than the fatigue limit of pipeline in the stress envelope of gained pipeline model
Value, now, resulting pipeline model then to meet equipment conveying and running the pipeline model of design under the conditions of two kinds, make
With optimization method optimization pipeline configuration efficiency high, cost is low, the cycle is short.
Finally it should be noted that above example is only illustrating the technical scheme of the invention, rather than to this hair
It is bright create protection domain limitation, although being explained with reference to preferred embodiment to the invention, this area it is general
It is logical it will be appreciated by the skilled person that can be modified to the technical scheme of the invention or equivalent substitution, without departing from this
The spirit and scope of innovation and creation technical scheme.
Claims (5)
- A kind of 1. optimization method of pipe vibration-damping, it is characterised in that：Comprise the following steps：（1）Pipeline model is established using modeling software for pipeline to be optimized；（2）The pipeline model established is imported in ABAQUSE softwares, and mesh generation is carried out to pipeline model；（3）In ABAQUSE softwares, boundary constraint and the physical parameter of pipeline model are set, wherein, boundary constraint includes clamped Border, incomplete built-in boundary connect with component, and physical parameter includes the material property of pipeline model, density, yang type modulus and Poisson's ratio；（4）Pipeline model meets optimization during equipment conveying condition, operating procedure（6）And step（7）Optimize calculating；Pipeline Model meets optimization during equipment service condition, operating procedure（8）And step（9）Optimize calculating；（5）Pipeline model had not only met equipment conveying condition but also had met the optimization of equipment operation, and former pipeline model to be optimized is transported Row step（6）And step（7）Optimize and the new pipeline model for meeting equipment conveying condition is calculated, then using step （7）Resulting new pipeline model operating procedure（8）And step（9）If through step（9）The stress point of pipeline model is calculated Maximum stress value is more than the fatigue limit value of pipeline in Butut, then to step（9）The new pipeline model of middle gained carries out step （2）、（3）、（8）With（9）Calculating is optimized again, if through step（9）Calculate in the stress envelope of gained pipeline model most Big stress value is less than the fatigue limit value of pipeline, then resulting pipeline model is then to meet two kinds of conditions of equipment conveying and operation The pipeline model of lower design；（6）Calculating is optimized to pipeline model using the model analysis pattern in ABAQUSE softwares, model analysis pattern includes Frequency analysis module, shape optimum module and iterative calculation module, wherein, linear perturbation submodule is set in frequency analysis module Block, the exponent number n of desired pipeline model mode of oscillation, n=20, in iterative calculation module are set in frequency analysis module Middle setting iterations t, t=10；（7）Model analysis model-based optimization result of calculation is the new pipe after the frequency values of the mode of oscillation of pipeline model and structure optimization Road model, according to step（6）In mode of oscillation exponent number n setting, accordingly, can obtain pipeline model preceding n ranks vibration The frequency values of mode, if the frequency values of preceding n ranks mode of oscillation are both greater than the maximum for transporting frequency, the new pipe after structure optimization Road model then meets traffic condition；If the frequency values of preceding n ranks mode of oscillation are not more than the maximum of transport frequency all, provide These frequency values are less than the Displacements Distribution of the pipeline model corresponding to the frequency values of the rank mode of oscillation of the maximum of transport frequency Figure, boundary constraint, return to step are carried out in new pipeline model to the maximum point of shift value in displacement distribution map（2）、（3）With （6）、（7）Calculating is optimized again, until the frequency values of the rank mode of oscillation of gained pipeline model, which are both greater than, transports frequency Maximum, now, resulting pipeline model are then the pipeline model for meeting equipment conveying design；（8）Calculating is optimized to pipeline model using the static analysis pattern in ABAQUSE softwares, static analysis pattern includes Static analysis module, shape optimum module and iterative calculation module, wherein, the setting iterations t in module is iterated to calculate, 0 ≤t≤30；（9）Static analysis model-based optimization result of calculation is the new pipeline mould after the stress envelope of pipeline model and structure optimization Type, if maximum stress value is less than the fatigue limit value of pipeline, resulting structure optimization in the stress envelope of pipeline model New pipeline model afterwards meets equipment service condition；If maximum stress value is more than or equal to pipe in the stress envelope of pipeline model The fatigue limit value in road, then step is carried out to the new pipeline model of gained（2）、（3）（8）With（9）Calculating is optimized again, directly Into the stress envelope of gained pipeline model, maximum stress value is less than the fatigue limit value of pipeline, now, resulting pipeline Model is then to meet the pipeline model needed for equipment operating energy loss.
- A kind of 2. optimization method of pipe vibration-damping according to claim 1, it is characterised in that：Step（6）With（8）Middle iteration Computing module is fitted in iterative calculation using the geometry of circular tube shaped to the network of pipeline model, approximating method For least square method.
- A kind of 3. optimization method of pipe vibration-damping according to claim 1, it is characterised in that：Step（8）In, iterations It is arranged to 10 times.
- A kind of 4. optimization method of pipe vibration-damping according to claim 1, it is characterised in that：Pipeline model is importing Need to generate SAT file formats before ABAQUSE softwares.
- A kind of 5. optimization method of pipe vibration-damping according to claim 1, it is characterised in that：It is 2~50 to transport frequency Hz。
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| US5213138A (en) * | 1992-03-09 | 1993-05-25 | United Technologies Corporation | Mechanism to reduce turning losses in conduits |
| CN101567026A (en) * | 2009-06-05 | 2009-10-28 | 北京科技大学 | Optimization design method for damping elbow of fluid-conveying pipeline guide structure |
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2014
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5213138A (en) * | 1992-03-09 | 1993-05-25 | United Technologies Corporation | Mechanism to reduce turning losses in conduits |
| CN101567026A (en) * | 2009-06-05 | 2009-10-28 | 北京科技大学 | Optimization design method for damping elbow of fluid-conveying pipeline guide structure |
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