CN104392038B - The finite element modeling method of different medium flexibility filling liquid structure - Google Patents
The finite element modeling method of different medium flexibility filling liquid structure Download PDFInfo
- Publication number
- CN104392038B CN104392038B CN201410664415.9A CN201410664415A CN104392038B CN 104392038 B CN104392038 B CN 104392038B CN 201410664415 A CN201410664415 A CN 201410664415A CN 104392038 B CN104392038 B CN 104392038B
- Authority
- CN
- China
- Prior art keywords
- fluid
- different medium
- filling liquid
- finite element
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to aircraft structural mechanics analysis field, more particularly to a kind of finite element modeling method of different medium flexibility filling liquid structure.The method includes：Finite element analysis geometrical model is established according to the geometric parameter of practical structures；Corresponding units are chosen according to the mechanics feature of different medium；The constitutive characteristics of fluid are simulated using variable modulus unit；Element of fluid, using the method for binding constraint, simulates the transmission between fluid and flexible covering with solid unit.The invention process is simple, easy to operate, substantially reduces the workload of different medium flexibility filling liquid structural finite element analysis.
Description
Technical field
The present invention relates to aircraft structural mechanics analysis field, more particularly to a kind of different medium flexibility filling liquid structure it is limited
Meta Model method.
Background technology
There is such a structure in engineer application, the placement of flexible covering on elastic construction, the filling of flexible covering inside
Liquid bears distribution pressure outside flexible covering, changes the shape of structure, this structure by adjusting the pressure and flow of liquid
Belong to different medium flexibility filling liquid structure, be directed to a variety of media such as fluid, solid, due to the mechanical behavior feature of each medium
Difference interacts between each medium complicated, and often relates to structure large deformation problem, is brought very to Mechanics Simulation analysis
Big difficulty.Fluid structurecoupling method is mostly used for the Finite Element Simulation Analysis of this multimedium flexibility filling liquid structure at present, but
It is fluid and structural simulation process complexity, finite element analysis heavy workload, certain difficulty is brought to practical application.Therefore, it is necessary to
Find it is a kind of can either accurate simulation different medium flexibility filling liquid structural mechanical property and the relatively simple side of modeling analysis process
Method.
Invention content
The technical problem to be solved by the present invention is to：A kind of finite element modeling side of different medium flexibility filling liquid structure is provided
Method, can be with the mechanical property of accurate simulation different medium flexibility filling liquid structure, while need not carry out complicated fluid structurecoupling meter
It calculates, modeling analysis process is relatively simple.
The invention mainly includes steps：The finite element modeling method of different medium flexibility filling liquid structure, it is characterized in that
It the described method comprises the following steps：
A) finite element analysis geometrical model is established according to the geometric parameter of practical structures；The geometric parameter refers to difference
The form parameter and characteristic size of each component in medium flexibility filling liquid structure；
B) corresponding units are chosen according to the mechanics feature of different medium：According to the deformation that flexible covering generates, selection carries out
The unit that geometrical non-linearity calculates；Each component is selected according to practical structures size selection unit when practical structures are thin plate
With plate member, solid element is selected when practical structures are entity structure；
C) constitutive characteristics of fluid are simulated using variable modulus unit:It, will when building the stiffness matrix of solid element
Each stiffness coefficient is set as variable, changes each stiffness coefficient size according to structure actual loading conditions, it is made to meet fluid media (medium)
Mechanical characteristics；
D) method that element of fluid is constrained with solid unit using binding：So that displacement and the solid of element of fluid all directions
The displacement of the corresponding all directions of unit is equal.
The beneficial effects of the invention are as follows：1) use the present invention that can accurately simulate different medium flexibility filling liquid structure
Mechanical property.It can be with the fluid media (medium) in accurate simulation enclosure space under different stresses by variable modulus unit
Mechanical property feature can simulate the transitive relation between different medium using binding constraint between different medium unit.2) should
Invention process is simple, easy to operate, substantially reduces the workload of different medium flexibility filling liquid structural finite element analysis.
Description of the drawings
Fig. 1 is different medium flexibility filling liquid structural schematic diagram of the embodiment of the present invention：
Wherein, " 1 " is flexible covering, and " 2 " are the fluid media (medium)s such as gas, liquid, and " 3 " are elastic constructions, in figure dotted line and
Solid line indicates respectively before flexible filling liquid malformation and deformed shape.
Specific implementation mode
Below by specific embodiment and in conjunction with attached drawing to further detailed description of the present invention.This example is a bulge
The variable flexible structure in type face, is made of elastic construction, flexible covering, internal fill fluid (gas or liquid) medium, flexible
Fluid media (medium) common stress and the deformation as a whole of covering and internal filling, support of the elastic construction as flexible covering
Structure is connected thereto, and structural schematic diagram is shown in attached drawing 1.Finite element analysis model is established according to the geometric parameter of practical structures, it is described
Geometric parameter refer to each component in different medium flexibility filling liquid structure form parameter and characteristic size；
A) according to the mechanics feature selection unit of different medium:Wherein 2 are simulated with solid element, and 1,3 are simulated with plate member.
B) constitutive characteristics of fluid are simulated using variable modulus unit:It, will when building the stiffness matrix of solid element
Each stiffness coefficient is set as variable；
Fluid can bear larger pressure, and it is very small to pull to and shear bearing capacity, can ignore substantially.According to this
Each stiffness coefficient is set as variable by one feature when building the stiffness matrix of solid element, when structure bears to press to load,
By adjusting the stiffness coefficient of unit axially and tangentially, unit is made to press to larger rigidity, and shear stiffness very little；When
When structure bears to pull to load, each stiffness coefficient parameter of unit is adjusted to small value, represents element of fluid under tension state
All directions rigidity all very littles.
C) it simulates between 2 solid element and the plate member for simulating 1, the plate member of simulation 3 is all made of with 1 plate member of simulation and bundlees about
Beam makes the displacement of the displacement of element of fluid all directions all directions corresponding with solid unit be equal, and simulation fluid is covered with flexible
Transmission between skin.
Claims (1)
1. a kind of finite element modeling method of different medium flexibility filling liquid structure, it is characterized in that the described method comprises the following steps：
A) finite element analysis geometrical model is established according to the geometric parameter of practical structures；The geometric parameter refers to different medium
The form parameter and characteristic size of each component in flexible filling liquid structure；
B) corresponding units are chosen according to the mechanics feature of different medium：According to the deformation that flexible covering generates, selection carries out geometry
The unit of NONLINEAR CALCULATION；Each component selects plate according to practical structures size selection unit when practical structures are thin plate
Member selects solid element when practical structures are entity structure；
C) constitutive characteristics of fluid are simulated using variable modulus unit:It, will be each rigid when building the stiffness matrix of solid element
Degree coefficient is set as variable, changes each stiffness coefficient size according to structure actual loading conditions, it is made to meet the mechanics of fluid media (medium)
Feature；
D) method that element of fluid is constrained with solid unit using binding so that the displacement of element of fluid all directions and solid unit
The displacement of corresponding all directions is equal, and simulates the transmission between fluid and flexible covering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410664415.9A CN104392038B (en) | 2014-11-19 | 2014-11-19 | The finite element modeling method of different medium flexibility filling liquid structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410664415.9A CN104392038B (en) | 2014-11-19 | 2014-11-19 | The finite element modeling method of different medium flexibility filling liquid structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104392038A CN104392038A (en) | 2015-03-04 |
| CN104392038B true CN104392038B (en) | 2018-11-13 |
Family
ID=52609941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410664415.9A Active CN104392038B (en) | 2014-11-19 | 2014-11-19 | The finite element modeling method of different medium flexibility filling liquid structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104392038B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108038258A (en) * | 2017-11-02 | 2018-05-15 | 成都飞机工业（集团）有限责任公司 | A kind of ejection impact dynamic response analysis method based on Coupled Rigid-flexible |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984802A (en) * | 2014-04-17 | 2014-08-13 | 中国航空工业集团公司沈阳飞机设计研究所 | Finite element modeling simplification method of honeycomb sandwich structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8262969B2 (en) * | 2009-10-09 | 2012-09-11 | Spirit Aerosystems, Inc. | Apparatus and method for manufacturing an aircraft stringer |
-
2014
- 2014-11-19 CN CN201410664415.9A patent/CN104392038B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984802A (en) * | 2014-04-17 | 2014-08-13 | 中国航空工业集团公司沈阳飞机设计研究所 | Finite element modeling simplification method of honeycomb sandwich structure |
Non-Patent Citations (2)
| Title |
|---|
| 6061铝合金飞行器翼尖蒙皮充液成形及起皱控制研究;郎利辉等;《锻压技术》;20140930;第39卷(第9期);第36-41页 * |
| 飞机大型复杂双曲度蒙皮充液成形数值模拟及实验研究;郎利辉等;《精密成形工程》;20111130;第3卷(第6期);第112-116页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104392038A (en) | 2015-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | A computationally efficient dynamical model of fluidic soft actuators and its experimental verification | |
| Groh et al. | Static inconsistencies in certain axiomatic higher-order shear deformation theories for beams, plates and shells | |
| CN104850689A (en) | Fluid-solid coupling computing method based on fixed grid technology | |
| CN102708247B (en) | Pressure compensation emitter design method based on fluid-solid interaction numerical calculation | |
| CN105241630A (en) | Pulse type rod strain balance applied to shock tunnel dynamometric test | |
| CN106777691B (en) | Rubber o-ring finite element modeling method for Structural Dynamics emulation | |
| CN105260581A (en) | Method for virtual vibration and impact tests of electromechanical control equipment of ship | |
| Craugh et al. | Coupled finite element and cellular automata methods for analysis of composite structures with fluid–structure interaction | |
| Peng et al. | Numerical investigation of the effects of structural geometric and material nonlinearities on limit-cycle oscillation of a cropped delta wing | |
| CN103440386A (en) | System and method for calculating driving torque of wind driven generator yaw system | |
| CN104392038B (en) | The finite element modeling method of different medium flexibility filling liquid structure | |
| CN103699756A (en) | Loose coupling simulation system and method | |
| CN104029826A (en) | Taring computing method for airplane structural strength test | |
| CN106021977B (en) | Subcutaneus adipose tissue biomethanics modeling method based on linear elasticity and hyperelastic model | |
| CN103870648B (en) | A kind of flexible solar battery wing dynamic load nonlinear analysis method | |
| CN103324805A (en) | Calculation method for checking ultimate strength of fan underframe | |
| CN106773782B (en) | Pneumatic servo elastic hybrid modeling method | |
| Pankonien et al. | Synergistic smart morphing aileron: aero-structural performance analysis | |
| CN109446702B (en) | Passive vibration reduction method of space science experiment cabinet | |
| CN106202802A (en) | A kind of undercarriage course stiffness simulation method | |
| Yang et al. | Dynamic analysis and application of a novel hydraulic displacement amplifier based on flexible pistons for micro stage actuator | |
| NO20111686A1 (en) | Conversion of reservoir breakdown for load scaling | |
| CN104155187A (en) | Closed container strength verification testing method | |
| CN103440423B (en) | A kind of for measuring the model of physiological loads effect hypozygal cartilage mechanical property | |
| Schildhauer et al. | Numerical simulation of fluid-structure interaction: Turek benchmark and kinetics of a reed valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |