CN106507759B - Aircraft flowing and the couple solution method of interdisciplinary system - Google Patents
Aircraft flowing and the couple solution method of interdisciplinary systemInfo
- Publication number
- CN106507759B CN106507759B CN200910120929.7A CN200910120929A CN106507759B CN 106507759 B CN106507759 B CN 106507759B CN 200910120929 A CN200910120929 A CN 200910120929A CN 106507759 B CN106507759 B CN 106507759B
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- subsystem
- interdisciplinary
- sub
- iteration
- hydrodynamics
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Abstract
Aircraft flowing and the couple solution method of interdisciplinary system, including：Hydrodynamics subsystem solves interdisciplinary subsystem solution (2) outside (1) hydrodynamics；Convergence judges (3)；The solution strategies that three parts are constituted.Hydrodynamics subsystem is solved and is solved using sub- iteration form with the interdisciplinary subsystem outside hydrodynamics, using synchronous sub- iteration propulsion, two systems are placed in global Asia iteration coupling propulsion system, so as to realize the solution between subsystem without time lag, the time lag of decoupling method is overcome, the time precision that coupling propulsion is solved is high, and large time step may be selected, solution efficiency is high, improves the accuracy of simulation.
Description
Technical field
The present invention relates to a kind of method calculated for multidisciplinary coupling.
Background technology
UNSTEADY FLOW and flight attitude and track, UNSTEADY FLOW and structure are streamed in order to explore aircraft
The relation of coupling in real time such as vibration, flight vehicle aerodynamic power and Aerodynamic Heating, is just extremely necessary that development is more
The integration coupling Comprehensive Analysis Technique of subject, multisystem.
The development of Fluid Mechanics Computation technology is made a general survey of, the research for Non―steady Problem is divided into three progressive levels：
First, the analogue technique of aircraft stationary state UNSTEADY FLOW；2nd, aircraft servo motion or servo bullet
The unsteady gas flow simulation technology of property；3rd, aircraft flows unsteady with interdisciplinary system coupling
Solve.The present invention is the key technology for solving the problems, such as emerging unsteady research third level.
With the development of computer technology and Computational Mechanics technology, people study for the calculating of every subjects
The stage of engineer applied is reached.To single hydrodynamics system, explicit method has high precision
The characteristics of, but could be restrained because explicit method requires that time step is very small；Jameson et al. develops
The advantage that is implicitly handled using sub- iteration of pseudo-time Method successfully solve Unsteady Flow Calculation time step
Too small bottleneck problem.The substantial advantage of sub- iterative technique is to efficiently solve the unsteady meter of hydrodynamics
Time lag problem in calculation between internal field and physical boundary.The dual-time scale Asia technology that changes unsteady is ground to above-mentioned
First and second level problem studied carefully is more successful.
But for multisystem coupled problem interdisciplinary (third level problem), existing widely used
In technology, although each subsystem tries hard to solve using time accuracy form is unsteady, but between each subsystem
Coupling but solved using the alternating decoupling of serial structure, information is exchanged and is constantly present in real time between subsystem
One step time lag, time precision highest only has single order.Totally apparently, multi-systems integration interdisciplinary
The numerical simulation study of coupling is also in Research on Methods and Qualify Phase.The technical bottleneck of core is to couple
The time accuracy of propulsion is not broken through, so as to limit the use of large time step, result is simulation essence
Spend low, efficiency low.By taking fluid and rigid motion as an example, nearest research is mainly solved using alternately decoupling
Exist on nonsteady fluid dynamics equation and Dynamical Equations of Rigid Body, time stepping method delayed；Lack on
Fluid dynamic mechanical equation and the complete complete couple solution of free degree rigid motion, thus influence numerical simulation
Accuracy and reliability.
Comprehensively apparently, develop multidisciplinary, multisystem integration coupling Comprehensive Analysis Technique, still have as follows
Several basic problems are urgently to be resolved hurrily：
1. firstly the need of the precision problem for solving simulation；
2. secondly need to solve the degree of accuracy and the uniformity problem of simulation；
3. the efficiency for solving to simulate is needed again.
In a word, sub- iterative technique is advantageous in the unsteady computation precision aspect of raising triangular web；
Therefore sub- iterative technique is being solved the problems, such as into the technical thought of Unsteady flow computation time lag, developed into
The unsteady computation of multisystem coupling, which constitute the technological core of the present invention (the global sub- iteration skill of broad sense
Art).
The content of the invention
The technology of the present invention solves problem：A kind of multidisciplinary multi-systems integration coupling accurate in real time is provided
The strategy and method of calculating.
Technical scheme：Aircraft flowing and the couple solution method of interdisciplinary system, including with
Lower part：(1) using the hydrodynamics subsystem of sub- iteration form solve and hydrodynamics outside across
Section's subsystem is solved, and the precision of couple solution reaches more than second order that time step and solution efficiency are more existing
Technology improves a magnitude；(2) promoted using synchronous sub- iteration, two systems are placed in physical time system
In one sub- iteration coupling propulsion system；(3) Policies for development is coupled by the sub- iteration of the overall situation of broad sense, it is real
The high-precision couple solution of interdisciplinary multisystem of the existing present invention.
The advantage of the present invention compared with prior art is as follows：
(1) fluid dynamic storage subsystem of the invention is solved asks with interdisciplinary subsystem outside hydrodynamics
Solution is using sub- iteration form, and theoretical foundation is reliable, simple in construction, meets practical needs.
(2) interdisciplinary multisystem of the invention is solved, without time lag between subsystem, couple solution when
Between precision reach more than second order, breach the yoke that prior art only has single order precision.
(3) interdisciplinary multisystem of the invention is solved, and can use big time step, and solution efficiency is improved
One magnitude.
(4) interdisciplinary subsystem of the invention is in addition to hydrodynamics system, extensively including dynamics of rigid bodies
System, elastomer structure dynamic system, heat structure dynamic system.
Brief description of the drawings
Fig. 1 is schematic flow sheet of the invention.
Wherein：1 is fluid dynamic storage subsystem；2 be the interdisciplinary subsystem outside hydrodynamics；3
Judge for convergence；4 be input parameter；5 be that couple solution terminates control；6 change for the global Asia of broad sense
Generation coupling Policies for development.
Embodiment
Such as schematic flow sheets of the Fig. 1 for the present invention.The present invention is by fluid dynamic storage subsystem 1, fluid dynamic
Interdisciplinary subsystem 2 outside, convergence judge that 3, input parameter 4, couple solution terminate control 5
Constituted with the sub- iteration coupling Policies for development 6 of the overall situation of broad sense.
This method solution procedure：
(1) parameter necessary to being solved by the input of input parameter 4；
(2) solved using the fluid dynamic storage subsystem of sub- iteration form, realize fluid dynamic storage subsystem
Time accuracy promote solve, solving precision be second order more than；
(3) solved, realized across using the interdisciplinary subsystem outside the hydrodynamics of sub- iteration form
The time accuracy of section's subsystem, which is promoted, to be solved, and solving precision is more than second order；
(4) promoted, be placed in global sub- iteration coupling propulsion system, so that real using synchronous sub- iteration
The propulsion without time lag is solved between existing subsystem, and real time step and solution efficiency are more existing
There is technology to improve a magnitude.
(5) convergence judgement is carried out, step (6) is carried out if meeting the condition of convergence, otherwise return to step
(2)。
(6) carry out couple solution and terminate control, complete to calculate if meeting and terminating control condition, otherwise return
Step (2) is returned, the propulsion of next step physical time step is carried out.
The theoretical foundation of the present invention is reliable, simple in construction, meets practical precision needs, simulation it is accurate
Spend, the efficiency high of simulation secure with uniformity.Have in terms of the numerical simulation in the fields such as Aero-Space
Irreplaceable advantage.
Claims (1)
1. aircraft flows the couple solution method with interdisciplinary system, it is characterised in that including following step
Suddenly：
(a) parameter necessary to being solved by input parameter input；
(b) solved using the fluid dynamic storage subsystem of sub- iteration form, realize fluid dynamic storage subsystem
Time accuracy, which is promoted, to be solved, and solving precision is more than second order；
(c) solved, realized interdisciplinary using the interdisciplinary subsystem outside the hydrodynamics of sub- iteration form
The time accuracy of subsystem, which is promoted, to be solved, and solving precision is more than second order；
(d) promoted using synchronous sub- iteration, fluid dynamic storage subsystem and interdisciplinary subsystem are placed in thing
In the sub- iteration coupling propulsion system for managing time unification, so as to realize fluid dynamic storage subsystem and interdiscipline
The propulsion without time lag is solved between system；
(e) convergence judgement is carried out, step (f) is carried out if meeting the condition of convergence, otherwise return to step (b)；
(f) carry out couple solution and terminate control, complete to calculate if meeting and terminating control condition, otherwise return
Step (b), carries out the propulsion of next step physical time step；
Interdisciplinary subsystem outside described hydrodynamics includes rigid body dynamic model, elastomer structure
Dynamic system, heat structure dynamic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910120929.7A CN106507759B (en) | 2009-04-03 | 2009-04-03 | Aircraft flowing and the couple solution method of interdisciplinary system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910120929.7A CN106507759B (en) | 2009-04-03 | 2009-04-03 | Aircraft flowing and the couple solution method of interdisciplinary system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106507759B true CN106507759B (en) | 2013-12-25 |
Family
ID=58358274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910120929.7A Active CN106507759B (en) | 2009-04-03 | 2009-04-03 | Aircraft flowing and the couple solution method of interdisciplinary system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106507759B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433532A (en) * | 2019-08-26 | 2021-03-02 | 北京理工大学 | Decoupling self-driving instrument considering second-order steering engine dynamics and decoupling control method thereof |
-
2009
- 2009-04-03 CN CN200910120929.7A patent/CN106507759B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433532A (en) * | 2019-08-26 | 2021-03-02 | 北京理工大学 | Decoupling self-driving instrument considering second-order steering engine dynamics and decoupling control method thereof |
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| GR03 | Grant of secret patent right | ||
| GRSP | Grant of secret patent right | ||
| DC01 | Secret patent status has been lifted | ||
| DCSP | Declassification of secret patent |