CN104786957A - Structure optimization design method for automobile damping board - Google Patents
Structure optimization design method for automobile damping board Download PDFInfo
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- CN104786957A CN104786957A CN201510214532.XA CN201510214532A CN104786957A CN 104786957 A CN104786957 A CN 104786957A CN 201510214532 A CN201510214532 A CN 201510214532A CN 104786957 A CN104786957 A CN 104786957A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
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- Acoustics & Sound (AREA)
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Abstract
The invention provides a structure optimization design method for an automobile damping board. The structure optimization design method has the advantages that through strain energy overlay analysis and parallel coupling mode design of sound power losses of the damping board and based on light weight option design of cost, performance and the process, the material, the thickness and the arrangement of the damping board are designed, overall shape optimization is conducted on a metal plate and the damping board, and the light weight design of the damping board is achieved on the premise that the NVH performance is achieved.
Description
Technical field
The present invention relates to automotive field, particularly relate to car damping plate structure Optimization Design.
Background technology
Car damping plate Main Function is vibration and noise reducing.The main experience relying on designer of orthodox car damping panel design, all generally carry out the check of NVH performance simulation by the damping panel after having designed structure digital-to-analogue in prior art, further strengthen again optimizing if do not met, although also have document by having carried out the optimal design of position and area to strain energy analysis or contribution analysis to damping, but also not about the technology of damping panel material, thickness optimization design aspect.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of car damping plate structure Optimization Design.
The invention provides a kind of car damping plate structure Optimization Design, comprise the steps:
A. set up body in white modal analysis finite element model, set up NTF, VTF model based on Trimbody;
B. comprise and calculate panel beating mode step and calculate panel beating sound power step, in described calculating panel beating mode step, calculate and export panel beating modal strain energy superposition cloud atlas, then determine that damping panel arranges scope, determine damping material 1, thickness 1; In described calculating panel beating sound power step, calculate the loss of panel beating sound power, then determine damping panel material 2, thickness 2;
C. according to low frequency panel beating modal strain energy superposition cloud atlas and intermediate frequency panel beating sound power loss result, by parallel coupled Design Fundamentals determination damping panel material and thickness;
D. design is selected in the lightweight carried out based on cost, performance and technique, determines damping panel material and thickness;
E. panel beating and the overall topography optimization design of damping panel is carried out;
F. car load NVH performance simulation is checked, and judges whether to meet design requirement, and if so, so performs step G, otherwise performs step B;
G. complete damping panel preliminary design, by car load sample car test simulation to mark, correct finite element model, as test results does not meet the requirement of NVH design objective, then by the model after correction, continuation optimization is carried out, until meet design objective to damping panel.
As a further improvement on the present invention, in described step B, in calculating panel beating mode step, to the panel beating modal analysis in the investigation region of wide coverage, export strain energy, and consider that weight carries out strain energy overlay analysis, export the cloud charts after strain energy superposition, then according to panel beating modal strain energy superposition cloud atlas, determine that damping panel arranges scope.
As a further improvement on the present invention, in described step D, by carrying out, based on car load NVH location, cost and technique, considering the lightweight influence factors such as damping panel material type, thickness, performance perameter, selection design is carried out to damping panel, finally determines damping panel material and thickness.
As a further improvement on the present invention, in described step e, after determining damping panel scope, material and thickness, with NVH performance for constraint function, minimum for objective function with quality, overall topography optimization design is carried out to panel beating and damping panel.
As a further improvement on the present invention, the investigation region of wide coverage comprises floor, front dividing plate, top cover, front and back wheel cover, side-wall outer-plate, side door, tail-gate.
The invention has the beneficial effects as follows: the present invention is by the parallel coupled Model Design to damping panel strain energy overlay analysis harmony loss in efficiency, the material of damping panel, thickness, layout are designed, then by carrying out overall topography optimization to panel beating and damping panel, under the prerequisite meeting NVH performance, the light-weight design of damping panel is achieved.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention.
Fig. 2 is floor of the present invention modal strain energy superposition cloud charts.
Fig. 3 is that floor of the present invention damping panel arranges scope.
Sound power loss figure when Fig. 4 is floor undamped.
Fig. 5 is the overall topography optimization design drawing of floor and damping panel.
Fig. 6 is the former conceptual design figure of damping panel.
Fig. 7 is damping panel Optimization Plan figure.
Fig. 8 is sound power loss result comparison diagram before and after floor damping panel is optimized.
Fig. 9 is NTF Comparative result figure before and after damping panel is optimized.
Detailed description of the invention
The invention discloses a kind of car damping plate structure Optimization Design, comprise the steps:
A. set up body in white modal analysis finite element model, set up NTF, VTF model based on Trimbody;
B. comprise and calculate panel beating mode step and calculate panel beating sound power step, in described calculating panel beating mode step, calculate and export panel beating modal strain energy superposition cloud atlas, then determine that damping panel arranges scope, determine damping material 1, thickness 1; In described calculating panel beating sound power step, calculate the loss of panel beating sound power, then determine damping panel material 2, thickness 2;
C. according to low frequency panel beating modal strain energy superposition cloud atlas and intermediate frequency panel beating sound power loss result, by parallel coupled Design Fundamentals determination damping panel material and thickness;
D. based on car load NVH location, cost and technique, consider the lightweight influence factors such as damping panel material type, thickness, performance perameter, selection design is carried out to damping panel, finally determines damping panel material and thickness;
E. panel beating and the overall topography optimization design of damping panel is carried out;
F. car load NVH performance simulation is checked, and judges whether to meet design requirement, and if so, so performs step G, otherwise performs step B;
G. complete damping panel preliminary design, by car load sample car test simulation to mark, correct finite element model, as test results does not meet the requirement of NVH design objective, then by the model after correction, continuation optimization is carried out, until meet design objective to damping panel.
Car damping plate structure Optimization Design of the present invention carries out the limitation designed for the experience that conventional damper plate mainly relies on designer, first the present invention calculates floor, top cover, the modal strain energy contribution amount distribution in region investigated by front dividing plates etc., damping panel material and thickness is tentatively determined according to modal strain energy superposition cloud atlas and panel beating sound power loss result, by based on cost, design is selected in the lightweight of performance and technique, tentatively determine the planform of damping material, thickness and layout, then overall topography optimization design carried out to panel beating and damping panel and check checking through NVH emulation, solve main confinement problems and the damping panel material relying on designer's experience of damping panel design, Thickness Design problem.As one embodiment of the present of invention, as shown in Figure 1, comprise the steps:
1. first set up body in white modal analysis finite element model, set up NTF, VTF model based on Trimbody;
2. panel beating modal analysis is carried out in investigation region (comprising floor, front dividing plate, top cover, front and back wheel cover, side-wall outer-plate, side door, tail-gate) larger to protection face respectively, export strain energy, and consider that weight carries out strain energy overlay analysis, export the cloud charts after strain energy superposition;
3., according to panel beating modal strain energy superposition cloud atlas, determine that damping panel arranges scope;
4. according to low frequency panel beating modal strain energy superposition cloud atlas and intermediate frequency panel beating sound power loss result, by parallel coupled Design Fundamentals determination damping panel material and thickness;
5. design is selected in the lightweight carried out based on cost, performance and technique, based on car load NVH location, cost and technique, consider the lightweight influence factors such as damping panel material type, thickness, performance perameter, selection design is carried out to damping panel, finally determines damping panel material and thickness;
6. after determining damping panel scope, material and thickness, with NVH performance for constraint function, minimum for objective function with quality, overall topography optimization design is carried out to panel beating and damping panel;
7. carrying out the check of NVH performance simulation, if do not met, then damping panel being arranged that scope, material and thickness carry out continuation optimization;
8. after completing emulation check, by car load sample car test simulation to mark, correct finite element model, as test results does not meet the requirement of NVH design objective, then continuation optimization is carried out, until meet design objective to damping panel to the model after correction.
Be described for the Optimal Structure Designing of certain vehicle damping panel below:
1. damping panel layout design:
Set up body in white model of modal analysis, the strain energy of computation model low-frequency range (being generally 0 to 200Hz), and consider that weight carries out strain energy overlay analysis, export the cloud charts (Fig. 2) after the strain energy superposition of panel beating (comprise floor, front dividing plate, top cover, wheel cover inner panel etc. and investigate plate), and tentatively determine the layout scope (Fig. 3) of damping panel.
2. damping panel material and Thickness Design:
According to panel beating strain energy superposition cloud atlas result, damping panel material just determines heat molten type and thermal magnetic, and thickness is not less than 2mm.Calculate the sound power loss in the intermediate frequency range of panel beating, according to the sound power loss result (Fig. 4) of panel beating, in conjunction with damping panel performance, cost and manufacturing process, parallel coupled determination damping panel material type and thickness, this vehicle floor, based on car load NVH location, cost and technique, considers the lightweight influence factors such as damping panel material type, thickness, performance perameter, carries out selection design to damping panel, select hot-melt damping plate, thickness is 2.5mm.
3. pair panel beating and damping panel carry out overall topography optimization design:
After determining damping panel material and thickness, with NVH performance for constraint function, minimum for objective function with quality, to panel beating and the overall topography optimization design of damping panel, optimum results as shown in Figure 5.
4, damping panel optimizes front and back NVH performance comparison:
The former scheme of damping panel as shown in Figure 6, carries out Optimal Structure Designing by damping panel optimization method to damping panel, and after optimizing, scheme is shown in Fig. 7.After damping panel optimization, quantity has lacked 12 pieces, and area decreases 30.7%, thickness decreases 16.7%, Mass lost 46.1%, before and after optimizing sound power loss as shown in Figure 8, optimize before and after shown in NTF Comparative result Fig. 9.Before and after optimizing, except individual peak has, the outer whole result of certain change changes less NTF, achieves the light-weight design of damping panel under the prerequisite meeting NVH performance.
Trimbody: the body in white of annex counterweight and shutter member model on spring;
NTF: vibration transfer function;
VTF: noise transfer function.
NVH: vibration, noise, sound vibration roughness;
The present invention has following beneficial effect:
A. the present invention is by designing targetedly, decreases design repeatedly, improves designing quality and efficiency:
The main experience relying on designer of conventional damper plate design, there is certain design hysteresis quality, the design cycle is longer, has larger limitation.In prior art, CAE application is less, generally be applied to the layout design of damping panel, the present invention is pre-designed targetedly by carrying out damping panel, the design of application cae analysis means prior involvement damping panel, optimization design is carried out for the layout of damping panel, material and thickness, and the Some Suggestions For Design of quantification is provided.The present invention has broken away from the pattern that traditional design relies on experience, and to the design of damping panel, more comprehensive and refinement, shortens the time-to-market of damping panel.The present invention is designed targetedly by prior involvement, decreases design repeatedly, reduces cost of development, improves designing quality and efficiency.
B. the present invention achieves lightweight under the prerequisite meeting NVH design objective:
The present invention superposes cloud atlas harmony loss in efficiency the result optimizing planform of damping material, thickness and layout scope according to modal strain energy, overall topography optimization design based on NVH performance has been carried out to panel beating and damping panel simultaneously, hinge structure, can under the prerequisite meeting design objective, reduce damping panel area, block count and weight, under the prerequisite meeting NVH performance objective, realize the light-weight design of damping panel.
C, optimization technique have employed vibration and the sound insulation property mixing control method of medium and low frequency, and the design for vehicle body damping panel provides a kind of new thinking and optimization method:
Present invention employs vibration and the sound insulation property mixing control method of medium and low frequency, achieve the structure optimization of damping panel, by the contrast before and after damping panel optimization of material, damping cost is reduced, for vehicle body damping panel provides a kind of new developing thought and optimization method under the prerequisite ensureing NVH performance.
The present invention also has following features:
1. optimization technique adopts parallel coupled Model Design flow process:
Damping panel material and Thickness Design have employed parallel coupled, namely consider modal strain energy stack result and the loss of panel beating sound power simultaneously, the former reduces the scope of design of material and thickness, and the latter's further refinement design of material and thickness, tentatively determines material and the thickness of damping panel;
2. the damping panel design lightweight carried out based on performance, cost and technique is selected:
The present invention is based on car load NVH location, cost and technique, consider the lightweight influence factors such as damping panel material type, thickness, performance perameter, selection design is carried out to damping panel, finally determines damping panel material and thickness.
3 invention has been overall topography optimization, achieve light-weight design:
The present invention with NVH performance for constraint function, minimum for objective function with quality, the design of overall topography optimization has been carried out to panel beating and damping panel, has improved car load NVH performance by overall topography optimization design, achieve light-weight design;
4. present invention employs vibration and the sound insulation property mixing control method of medium and low frequency, the design for vehicle body damping panel provides a kind of new developing thought and optimization method:
Present invention employs vibration and the sound insulation property mixing control method of medium and low frequency, achieve the structure optimization of damping panel, by the contrast before and after damping panel optimization of material, under the prerequisite meeting NVH performance, reduce damping cost, the design for vehicle body damping panel provides a kind of new developing thought and optimization method.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. a car damping plate structure Optimization Design, is characterized in that, comprises the steps:
A. set up body in white modal analysis finite element model, set up NTF, VTF model based on Trimbody;
B. comprise and calculate panel beating mode step and calculate panel beating sound power step, in described calculating panel beating mode step, calculate and export panel beating modal strain energy superposition cloud atlas, then determine that damping panel arranges scope, determine damping material 1, thickness 1; In described calculating panel beating sound power step, calculate the loss of panel beating sound power, then determine damping panel material 2, thickness 2;
C. according to low frequency panel beating modal strain energy superposition cloud atlas and intermediate frequency panel beating sound power loss result, by parallel coupled Design Fundamentals determination damping panel material and thickness;
D. design is selected in the lightweight carried out based on cost, performance and technique, determines damping panel material and thickness;
E. panel beating and the overall topography optimization design of damping panel is carried out;
F. car load NVH performance simulation is checked, and judges whether to meet design requirement, and if so, so performs step G, otherwise performs step B;
G. complete damping panel preliminary design, by car load sample car test simulation to mark, correct finite element model, as test results does not meet the requirement of NVH design objective, then by the model after correction, continuation optimization is carried out, until meet design objective to damping panel.
2. car damping plate structure Optimization Design according to claim 1, it is characterized in that, in described step B, in calculating panel beating mode step, to the panel beating modal analysis in the investigation region of wide coverage, export strain energy, and consider that weight carries out strain energy overlay analysis, export the cloud charts after strain energy superposition, then according to panel beating modal strain energy superposition cloud atlas, determine that damping panel arranges scope.
3. car damping plate structure Optimization Design according to claim 1, it is characterized in that, in described step D, by carrying out based on car load NVH location, cost and technique, consider the lightweight influence factors such as damping panel material type, thickness, performance perameter, selection design is carried out to damping panel, finally determines damping panel material and thickness.
4. car damping plate structure Optimization Design according to claim 1, is characterized in that, in described step e, after determining damping panel scope, material and thickness, with NVH performance for constraint function, minimum for objective function with quality, overall topography optimization design is carried out to panel beating and damping panel.
5. car damping plate structure Optimization Design according to claim 2, is characterized in that, the investigation region of wide coverage comprises floor, front dividing plate, top cover, front and back wheel cover, side-wall outer-plate, side door, tail-gate.
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| CN105574268A (en) * | 2015-12-16 | 2016-05-11 | 上汽通用五菱汽车股份有限公司 | Modality optimization method of outside rear-view mirror of automobile |
| CN106202653A (en) * | 2016-06-28 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of vehicle body damping distribution optimization method and system |
| CN108146365A (en) * | 2017-12-01 | 2018-06-12 | 浙江吉润汽车有限公司 | Damping sheet, vehicle body and vehicle |
| CN109284582A (en) * | 2018-11-23 | 2019-01-29 | 重庆长安汽车股份有限公司 | A kind of vehicle body pitch damping glue lightweight optimizing method for disposing |
| CN109635507A (en) * | 2019-01-11 | 2019-04-16 | 汽-大众汽车有限公司 | Method for arranging based on the car damping piece that emulation is combined with experiment |
| CN109783830A (en) * | 2017-11-15 | 2019-05-21 | 华晨汽车集团控股有限公司 | A kind of motor vehicle damping fin optimization placement method |
| CN109946091A (en) * | 2019-03-25 | 2019-06-28 | 重庆长安汽车股份有限公司 | A method of evading vehicle body low-frequency noise problem |
| CN110263408A (en) * | 2019-06-13 | 2019-09-20 | 中汽研（天津）汽车工程研究院有限公司 | A method of utilizing BNI curve assessment NTF risk |
| CN111797466A (en) * | 2020-06-08 | 2020-10-20 | 一汽奔腾轿车有限公司 | Engine cover vibration optimization design method |
| CN112380628A (en) * | 2020-11-25 | 2021-02-19 | 上汽通用五菱汽车股份有限公司 | Automobile floor damping optimization method |
| CN112733264A (en) * | 2020-12-31 | 2021-04-30 | 宜宾凯翼汽车有限公司 | Design method of vehicle body damping system |
| CN113127969A (en) * | 2021-03-24 | 2021-07-16 | 东风柳州汽车有限公司 | Automobile damping plate simulation modeling method, device, equipment and storage medium |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105574268B (en) * | 2015-12-16 | 2018-11-30 | 上汽通用五菱汽车股份有限公司 | A kind of automobile outer rear-view mirror modal Optimization method |
| CN105574268A (en) * | 2015-12-16 | 2016-05-11 | 上汽通用五菱汽车股份有限公司 | Modality optimization method of outside rear-view mirror of automobile |
| CN106202653B (en) * | 2016-06-28 | 2019-11-05 | 广州汽车集团股份有限公司 | A kind of vehicle body damping distribution optimization method and system |
| CN106202653A (en) * | 2016-06-28 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of vehicle body damping distribution optimization method and system |
| CN109783830A (en) * | 2017-11-15 | 2019-05-21 | 华晨汽车集团控股有限公司 | A kind of motor vehicle damping fin optimization placement method |
| CN108146365A (en) * | 2017-12-01 | 2018-06-12 | 浙江吉润汽车有限公司 | Damping sheet, vehicle body and vehicle |
| CN109284582A (en) * | 2018-11-23 | 2019-01-29 | 重庆长安汽车股份有限公司 | A kind of vehicle body pitch damping glue lightweight optimizing method for disposing |
| CN109635507A (en) * | 2019-01-11 | 2019-04-16 | 汽-大众汽车有限公司 | Method for arranging based on the car damping piece that emulation is combined with experiment |
| CN109946091A (en) * | 2019-03-25 | 2019-06-28 | 重庆长安汽车股份有限公司 | A method of evading vehicle body low-frequency noise problem |
| CN110263408A (en) * | 2019-06-13 | 2019-09-20 | 中汽研（天津）汽车工程研究院有限公司 | A method of utilizing BNI curve assessment NTF risk |
| CN110263408B (en) * | 2019-06-13 | 2023-04-25 | 中汽研（天津）汽车工程研究院有限公司 | Method for evaluating NTF risk by using BNI curve |
| CN111797466A (en) * | 2020-06-08 | 2020-10-20 | 一汽奔腾轿车有限公司 | Engine cover vibration optimization design method |
| CN112380628A (en) * | 2020-11-25 | 2021-02-19 | 上汽通用五菱汽车股份有限公司 | Automobile floor damping optimization method |
| CN112733264A (en) * | 2020-12-31 | 2021-04-30 | 宜宾凯翼汽车有限公司 | Design method of vehicle body damping system |
| CN113127969A (en) * | 2021-03-24 | 2021-07-16 | 东风柳州汽车有限公司 | Automobile damping plate simulation modeling method, device, equipment and storage medium |
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