CN112119002B - Vehicle body with a trimming point for connecting a trimming mass and method for adjusting the acoustic properties of a vehicle - Google Patents
Vehicle body with a trimming point for connecting a trimming mass and method for adjusting the acoustic properties of a vehicle Download PDFInfo
- Publication number
- CN112119002B CN112119002B CN201980032932.5A CN201980032932A CN112119002B CN 112119002 B CN112119002 B CN 112119002B CN 201980032932 A CN201980032932 A CN 201980032932A CN 112119002 B CN112119002 B CN 112119002B
- Authority
- CN
- China
- Prior art keywords
- trimming
- vehicle body
- vehicle
- frequency curve
- passenger compartment
- 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
- 238000009966 trimming Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims 1
- 238000011161 development Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/10—Noise analysis or noise optimisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
The invention relates to a body (100) for a vehicle. The vehicle body (100) comprises a passenger compartment (101) for at least one passenger of the vehicle. Furthermore, the body (100) comprises at least one trimming point (301, 302, 303) which is designed to fix at least one trimming mass (320, 330) to the body (100) in such a way that the acoustic properties of the passenger compartment (101) are changed by the trimming mass (320, 330).
Description
Technical Field
The invention relates to a method for adjusting the acoustic properties of a body of a vehicle. The invention also relates to a vehicle body having means for adjusting the acoustic properties of the vehicle body.
Background
Vehicle bodies for vehicles typically form a passenger compartment for one or more occupants of the vehicle. If possible, the body is designed such that the passenger compartment has specific acoustic properties, in particular with regard to low-frequency acoustic vibrations in a frequency range between 30Hz and 100 Hz.
The acoustic properties of the vehicle body are usually set within the scope of vehicle development by means of computer-based body vibration models. Deviations between the calculation of the vibration model and the actual acoustic properties of the manufactured vehicle body can occur. Such deviations can result in relatively high costs for the adjustment measures to be taken on the vehicle body to achieve the desired acoustic properties.
Disclosure of Invention
The technical task involved here is to match the acoustic properties of the already manufactured vehicle body to the desired acoustic properties in an efficient and precise manner.
According to one aspect, a vehicle body for a vehicle is described. The body may comprise, for example, metal and/or fiber composite materials. The vehicle may be a motor vehicle, in particular a road motor vehicle. The vehicle body includes a passenger compartment for at least one occupant of the vehicle. The passenger compartment may form a space, in particular an enclosed space, in which one or more passengers may be accommodated. For example, one or more seats and/or seat rows may be secured to the vehicle body in the passenger compartment, and one or more occupants may be seated on the seats and/or seat rows.
The vehicle body may be developed to provide a passenger compartment having one or more particular acoustic characteristics. The object of vehicle body development may be, inter alia, to provide a passenger compartment which (in response to a specific stimulus) has a nominal frequency curve of the acoustic load (caused by the passenger compartment and/or the vehicle body). The acoustic load can be described, for example, by the sound level in the passenger compartment and/or the volume velocity of the passenger compartment. Thus, a nominal frequency curve of sound level and/or volume speed may be provided for the vehicle body. The frequency curve may cover or be limited to a frequency range from a lower frequency (e.g., 10Hz, 20Hz, 30Hz, or higher) to a higher frequency (e.g., 100Hz, 90Hz, 80Hz, or less). The low-frequency acoustic vibration characteristic of the vehicle body can thus be described by this frequency curve.
In the field of vehicle development, computer-based and/or mathematical vibration models of a vehicle body can be provided and/or created in order to describe the vibration and/or acoustic properties of the vehicle body and in particular of the passenger compartment. The vibration model may have a plurality of parameters, each of which has a feasible range of values. The possible value ranges of the parameters may depend on possible tolerances in the manufacture of the body and/or possible inaccuracies and/or uncertainties of the vibration model. The vibration model of the vehicle body can be designed to provide a plurality of frequency curves for the acoustic load in the passenger compartment for the feasible value ranges of the plurality of parameters. A (possibly) frequency curve can be a nominal frequency curve.
Based on the above-mentioned manufacturing tolerances and/or inaccuracies and/or uncertainties of vibration models (used in vehicle body development), it can happen that the actual frequency curve of the actually manufactured vehicle body with respect to acoustic loads (such as sound level and/or volume velocity) deviates significantly from the nominal frequency curve of the vehicle body. In particular, the maximum of the acoustic load (e.g. of the sound level and/or the volume velocity) of the actual frequency curve may be significantly higher than the maximum of the nominal frequency curve. Thus, the acoustic load of the body actually manufactured may be significantly higher than the acoustic load planned during development of the body (e.g., increased acoustic load when driving on a rough road).
The body includes at least one trim point configured to secure at least one trim mass to the body. The trimming point can be arranged on the vehicle body in such a way that the acoustic properties of the passenger compartment can be changed by means of the trimming mass. In particular, the fine tuning points can be arranged on the vehicle body in such a way that the actual frequency curve of the acoustic load in the passenger compartment, in particular close to the nominal frequency curve, can be varied by the fine tuning masses. Particularly preferably, the fine tuning point can be arranged on the vehicle body in such a way that the maximum value of the actual frequency curve of the acoustic load can be reduced by the fine tuning mass.
Thus, a vehicle body is described that is directly developed and manufactured with one or more trim points for attaching or fixing trim qualities. In particular during the development and/or manufacture of the body and/or the vehicle, a fastening mechanism for one or more fine-tuning masses and/or the required installation space can be provided. Thus, one or more trim masses can be fixed to the body in an efficient manner after the development of the body is complete and/or after the body is manufactured, in order to compensate for deviations from the originally intended nominal acoustic properties of the body.
The trim mass may comprise a unit of a specific mass or a specific weight, which unit may be fixed (e.g. screwed) to the body. Alternatively or additionally, the trim mass may include a damper. Alternatively or additionally, the trim mass may include a sprayable material (e.g., an acoustic barrier material) that is sprayed onto the vehicle body. The weight of the trim mass may be 100g, 150g, 200g, 250g, 300g, 350g, 500g, 100g, or more. Different trim masses having different weights (e.g., in 50g increments) may be provided herein.
The trimming point provided on the vehicle body can comprise a fixing element, in particular a screw and/or a nut, which is designed to form a (force-fitting and/or form-fitting) connection with a complementary fixing element of the trimming mass in order to fix the trimming mass on the vehicle body. The fine-tuning mass can thus be fixed to the vehicle body in an effective manner, for example by means of a screw connection.
The body may include a load-bearing body member (e.g., a roof or deck). The load-bearing body part may be, for example, a part of a wall of a passenger compartment of the vehicle. Furthermore, the body or the vehicle comprising the body may comprise a cover, which at least partially covers the load-bearing body part. A cavity or installation space for accommodating the trimming mass can thus be provided between the body part and the cover. If it is not necessary to fix a trimming mass to the body in order to adjust or trim one or more acoustic properties of the body, the cavity may be left empty if desired. On the other hand, if the acoustic properties of the actually manufactured vehicle body should or must be changed, a cavity can be used.
The cavity may be configured to receive a layer (e.g., having a thickness of 2mm, 5mm, 10mm or more or 10 cm) of sprayable material, particularly sound barrier material, as a fine tuning mass 2 、100cm 2 、500cm 2 、1000cm 2 、2000cm 2 A layer of an area or larger). Thus, the trimming mass can be fixed to the vehicle body in an effective and precise manner.
The body may include at least one bow (e.g., on the a, B and/or C pillars of the vehicle). The bow can be arranged on the roof of the vehicle body. Furthermore, the bow may extend along a transverse axis of the body (i.e. transverse to the direction of vehicle travel). The body may have at least one fine adjustment point arranged on the bow. By arranging the trimming points on the bow, the acoustic properties of the passenger compartment, in particular the frequency curve of the acoustic load, can be influenced significantly in an effective manner (i.e. with a trimming mass of as low a weight as possible).
The vehicle body may comprise a deck, in particular a rear window deck, arranged in the rear region within the passenger cabin. Further, the body may have at least one fine adjustment point disposed on the deck. By arranging at least one fine-tuning point on the deck of the passenger compartment, the acoustic properties of the vehicle body can be changed in a particularly effective manner.
The vehicle body may include at least one planform vehicle body component (e.g., a roof or a deck) as part of a wall of the passenger compartment. The planar body member may form, for example, 10%, 20%, or more of the passenger bulkhead area. The vehicle body can thus have relatively large-area vehicle body parts. The body can furthermore have at least one fine-adjustment point arranged on the flat body part. By providing one or more fine-tuning points on a relatively large-area body part, the acoustic properties of the body can be changed in a particularly effective manner.
As mentioned above, the body can be developed, for example, on the basis of a mathematical vibration model such that the body or the passenger compartment has a specific nominal frequency curve of the acoustic load (e.g. of the sound level and/or the volume velocity).
The vibration model of the vehicle body can be designed to provide a plurality of frequency curves for the acoustic load in the passenger compartment for the range of values possible for the plurality of parameters. The at least one fine adjustment point may be arranged on the body such that the maximum of the N frequency curves of the plurality of frequency curves having the N highest maxima decreases (where N is an integer and N > 0, in particular N =3, 5, 10 or more). In particular, the at least one fine adjustment point can be set such that the maximum value can be reduced by 30%, 40%, 50% or more (in order not to exceed a certain maximum weight (e.g. 1.5 kg) and/or a certain maximum volume (e.g. 10000 cm), respectively 3 ) Fine tuning quality of).
Thus, the position of one or more fine-tuning points of the body can be determined on the basis of a vibration model of the body, by means of which an effective and significant change of the frequency curve of the acoustic load can be achieved for the N "worst-case" frequency curves. An effective modification is here intended to use a trim mass having a weight which is as low as possible (e.g. a total weight of the trim mass of 2.5kg, 1.5kg or less). The significant change is intended to reduce the maximum of the N "worst case" frequency curves as much as possible (e.g., by 30%, 40%, 50%, or more).
As mentioned above, the body may be developed to have a nominal frequency curve with respect to the acoustic load within the passenger compartment. The at least one trimming point of the vehicle body can be such that the trimming mass is fixed at the trimming point on the vehicle body only if the actual frequency curve (clearly) deviates from the nominal frequency curve with respect to the sound load in the passenger compartment. In particular, the trimming mass can be fixed to the trimming point on the body if necessary only if the maximum value of the actual frequency curve exceeds the maximum value of the nominal frequency curve by, for example, at least 20%, 30%, 40%, 50% or more. Alternatively or additionally, the trimming mass can be fixed to the trimming point on the body, if necessary only when the maximum value of the actual frequency curve reaches or exceeds a specific threshold value. The trimming point can therefore only be used to fix the trimming mass to the vehicle body if necessary in order to change the acoustic properties of the vehicle body.
The at least one fine tuning point of the body may be constructed and arranged to fix the fine tuning mass to the fine tuning point on the body such that the actual frequency curve of the body with the fine tuning mass fixed thereto approaches the nominal frequency curve. Alternatively or additionally, the at least one fine-tuning point of the body can be designed and arranged for fixing the fine-tuning mass at a fine-tuning point on the body, so that the maximum value of the actual frequency curve of the body to which the fine-tuning mass is fixed is reduced (in particular by 20%, 30%, 40%, 50% or more) compared to the maximum value of the actual frequency curve of the body without the fine-tuning mass.
According to another aspect, a method for adjusting body acoustic properties of a vehicle is described. The vehicle body includes a passenger compartment for at least one occupant of the vehicle. The body also includes at least one trim point for securing a trim mass. The method can be carried out, for example, in the field of vehicle body production (for example, by means of a production robot).
The method includes determining whether an actual frequency curve relating to acoustic loading within the passenger compartment deviates significantly from a nominal frequency curve. Measurements may be made to determine the actual frequency curve for this purpose. For example, if the maximum of the actual frequency curve is 10%, 20%, 30% or more higher than the maximum of the nominal frequency curve, there may be a significant deviation.
Further, the method comprises: when it is determined that the actual frequency curve deviates significantly from the nominal frequency curve, the fine tuning quality is fixed at the fine tuning point. On the other hand, if it is determined that the actual frequency curve does not deviate significantly from the nominal frequency curve, the fine tuning quality is generally not fixed at the fine tuning point. Thus, the acoustic properties of the passenger compartment of the vehicle body can be adjusted in an efficient and accurate manner.
The method may include determining the weight of the trim mass that should be fixed at the trim point. For this purpose, a (mathematical) vibration model of the vehicle body can be provided, which is designed to provide a plurality of frequency curves for the sound load in the passenger compartment for a plurality of possible ranges of values of the model parameters. The vibration model can be created and/or used already in the scope of the development of the vehicle body, for example. The weight of the trimming mass that is or should be fixed at the trimming point can then be determined in an efficient and accurate manner on the basis of the vibration model.
According to another aspect, a road motor vehicle (in particular a car or truck or bus) is described, comprising a body as described herein.
It should be noted that the methods, devices, and systems described herein can be used not only alone, but in combination with other methods, devices, and systems described herein. Additionally, any aspects of the methods, apparatus and systems described herein may be combined with one another in a variety of ways.
Drawings
The present invention is described in detail below with reference to examples. The attached drawings are as follows:
FIG. 1 illustrates an exemplary vehicle body;
FIG. 2 illustrates an exemplary frequency plot of a volumetric velocity of a vehicle body or vehicle body passenger compartment;
FIG. 3a illustrates an exemplary trim point on a vehicle body;
FIGS. 3b and 3c illustrate exemplary trim quality;
FIG. 3d shows exemplary frequency curves for volume velocity with and without a fine tuning mass;
FIG. 3e illustrates exemplary trim points on a vehicle body; and
FIG. 4 illustrates a flow chart of an exemplary method for adjusting acoustic properties of a vehicle body.
Detailed Description
As mentioned at the outset, the present document relates to an effective adjustment, in particular readjustment, of the acoustic properties of a vehicle body. In this case, fig. 1 shows an exemplary body 100 of a passenger car (PKW). The vehicle body 100 forms a passenger compartment 101, which is closed upwards by a roof 102. The roof 102 typically forms a relatively large (vibratable) surface. Furthermore, the vehicle body 100 may optionally have a deck, in particular a rear deck 103, in the rear region. The passenger compartment 101 may have an a-pillar 105 (in the forward region), a middle B-pillar 106, and a C-pillar 107 in the rear region.
In the context of development of the vehicle body 100, a vibration model of the vehicle body 100 may be created. The vibration model may have one or more parameters such as the mass of various components of the vehicle, the modulus of elasticity of a vehicle component (e.g., door weather strip), and/or the absorbency of a vehicle component (e.g., interior trim, carpet, etc.).
The acoustic characteristics of the vehicle body 100 can be analyzed by means of a vibration model of the vehicle body 100. One exemplary measurement of acoustic properties is the volumetric velocity of the passenger compartment 101. Fig. 2 shows a plurality of frequency curves 200 of the speed of the volume of the passenger compartment 101 as a function of the frequency 201 (in particular in the frequency range between 30Hz and 100 Hz). In this case, one or more parameters of the vibration model are varied within a specific value range in order to determine a plurality of frequency curves 200. An average frequency curve 203 may be determined from the plurality of frequency curves 200. Fig. 2 also shows a nominal frequency curve 204 of the body 100, which corresponds to the originally planned or target frequency curve of the body 100.
As can be seen from fig. 2, the actual frequency curve of the volume velocity may deviate significantly from the nominal frequency curve 204. In particular, the maximum value 202 of the volume velocity of the actual frequency curve may be significantly higher than the maximum value of the volume velocity of the nominal frequency curve 204. This can result in objectionable noise in the passenger compartment 101 when the vehicle is in operation.
Fig. 3a shows a body 100 with three exemplary trim points or connection points 301, 302, 303 for connecting trim masses. Fig. 3e shows other exemplary fine tuning points 301 (as white circles) on different parts of the body 100. One or more fine- adjustment points 301, 302 may be provided on the roof 102 of the body 100, in particular on one or more bows 340 of the body 100 (see fig. 3 e). Alternatively or additionally, one or more trim points 303 may be provided on the rear package tray 103 of the vehicle body 100.
The one or more trim points 301, 302, 303 may each be configured to accommodate a trim mass. Fig. 3b shows a fine- tuning point 301, 302, 303, in which a screw nut 311 is arranged in a body part 310 of the body 100 in order to be able to fix a fine-tuning mass 320 to the body 100 by means of a screw 321. Fig. 3c shows a fine- tuning point 301, 302, 303, in which a sufficiently large cavity or installation space 313 is provided between the body part 310 and a cover 312 of the passenger compartment 101 in order to be able to fix a sprayable coating, in particular a sound-damping coating, as a fine-tuning mass 330 to the body part 310.
Accordingly, a vehicle body 100 may be provided having one or more trim points 301, 302, 303 in which trim masses 320, 330, respectively, may be secured as needed to alter the acoustic properties of the vehicle body 100. If, for example, after development and manufacture of the vehicle body 100, it is indicated that the acoustic properties of the manufactured vehicle body 100 deviate from the desired or planned acoustic properties of the vehicle body 100, one or more trim masses 320, 330 may be fixed to the vehicle body 100 at the one or more trim points 301, 302, 303 to correct the acoustic properties of the manufactured vehicle body 100.
Fig. 3d shows an exemplary frequency curve 331 of the passenger compartment 101 volumetric velocity of the manufactured vehicle body 100. As can be seen from fig. 3d, this frequency curve 331 has a relatively high maximum 202, which can lead to acoustically unpleasant vibrations of the passenger compartment 101. A corrected frequency curve 332 of the volume velocity may be achieved by applying one or more trim masses 320, 330. As can be seen from fig. 3d, the maximum 202 of the original frequency curve 331 may decrease in the corrected frequency curve 332.
In order to determine the suitable location of the one or more fine tuning points 301, 302, 303, parameters of the vibration model of the vehicle body 100 may be analyzed, which have a relatively large influence on the vibration simulation result of the vehicle body 100 and whose values are not precisely known (i.e. may vary within a certain range of values). For these parameters, a possible value bandwidth, i.e. a possible value range, can be determined (e.g. by analysis or estimation). A stochastic computational model of the possible dispersion of the acoustic properties (e.g., volumetric velocity) of the body 100 can then be created (e.g., as shown in fig. 2). This results in a large number of solutions that can be evaluated statistically. In particular, the possible bandwidth of the acoustic properties, in particular the frequency curve 200 of the volume velocity, can be determined.
A certain number of outliers (e.g., with a particularly high maximum 202) may be analyzed based on the simulated bandwidth of the possible acoustic properties (especially the large number of possible frequency curves 200 based on volume velocity). The values of the one or more fine tuning points 301, 302, 303 and/or one or more fine tuning masses 320, 330 may then be determined based on a limited number of outliers, in particular such that the maximum value 202 may be reduced accordingly.
To determine the location of one or more trim points 301, 302, 303 and/or to determine the value of one or more trim masses 320, 330, trim points 301, 302, 303 and trim masses 320, 330 may be considered over one or more locations of the vibration model of the body 100. It is then possible to analyze, by means of a supplementary vibration model, where the one or more fine-tuned masses 320, 330 should be arranged in the body 100, in order to reliably and effectively (i.e. with as low a mass as possible) compensate possible outliers of the acoustic properties of the body 100. The position of the one or more fine tuning points 301, 302, 303 may thus be determined based on the supplemented vibration model.
FIG. 4 illustrates a flow chart of an exemplary method 400 for adjusting the acoustic properties of the vehicle body 100. The vehicle body 100 includes a passenger compartment 101 for at least one passenger of the vehicle. Furthermore, the body 100 comprises at least one trimming point 301, 302, 303 for fixing a trimming mass 320, 330. The method 400 may be performed, for example, during or after the manufacture of the vehicle body 100 (e.g., by a robot).
The method 400 includes: it is determined 401 whether the actual frequency curve 200 (e.g. of the sound level and/or the volume velocity) with respect to the sound load in the passenger compartment 101 deviates significantly from the nominal frequency curve 204. Further, the method 400 includes: the trimming masses 320, 330 are fixed 402 at trimming points 301, 302, 303 (if necessary only) when it is determined that the actual frequency curve 200 deviates significantly from the nominal frequency curve 204. The deviation of the actual frequency curve 200 from the nominal frequency curve 204 can thus be at least partially supplemented. On the other hand (when there is no significant deviation), the fixing of the fine- tuning masses 320, 330 can be dispensed with.
The measures described herein allow the acoustic properties of the vehicle body 100 to be adjusted or coordinated in a cost-and weight-saving manner even at later points in time of development and/or manufacture of the vehicle body 100. Furthermore, since the measure acting on the entire acoustic characteristic dispersion band can be distinguished from the measure of eliminating a possible acoustic characteristic abnormal value (such as the measure described herein), a functionally lightweight structure can be realized.
The invention is not limited to the embodiments shown. In particular, it should be noted that the description and drawings are only intended to illustrate the principles of the proposed method, apparatus and/or system.
Claims (20)
1. Body (100) for a vehicle, the body (100) comprising:
-a passenger compartment (101) for at least one passenger of the vehicle; and
-at least one trimming point (301, 302, 303) which is designed to fix at least one trimming mass (320, 330) to the body (100) in such a way that the acoustic properties of the passenger compartment (101) are changed by the trimming mass (320, 330), wherein,
-the body (100) is developed based on a mathematical vibration model;
the vibration model has a plurality of parameters, each of which has a possible range of values;
the possible value ranges of the parameters depend on possible tolerances in the manufacture of the body (100) and/or possible inaccuracies and/or uncertainties of the vibration model;
-the vibration model of the body (100) is designed to provide a plurality of frequency curves (200) with respect to the acoustic load in the passenger compartment (101) for a feasible range of values of the plurality of parameters;
-the at least one fine tuning point (301, 302, 303) is arranged on the body (100) such that a maximum (202) of N frequency curves (200) of the plurality of frequency curves (200) having the N highest maxima (202) decreases; and is provided with
-N is an integer and N > 0.
2. Body (100) according to claim 1, wherein the trimming point (301, 302, 303) comprises a fixing element (311) configured for forming a connection with a complementary fixing element (321) of the trimming mass (320, 330) in order to fix the trimming mass (320, 330) on the body (100).
3. The vehicle body (100) of claim 1 or 2,
-the body (100) comprises a load-bearing body part (310);
-the body (100) comprises a cover (312) at least partially covering the load-bearing body part (310); and is
-a cavity (313) for accommodating the trimming mass (320, 330) is provided between the body part (310) and the cover (312).
4. Vehicle body (100) according to claim 3, wherein the cavity (313) is configured for accommodating a layer of sprayable material as a trimming mass (320, 330).
5. Vehicle body (100) according to claim 1 or 2,
-the body (100) comprises at least one bow (340); and is
-the body (100) has at least one fine-tuning point (301, 302, 303) arranged on an arch (340).
6. Vehicle body (100) according to claim 1 or 2,
-the body (100) comprises a deck (103) arranged in a rear region within a passenger compartment (101); and is
-the body (100) has at least one fine-tuning point (301, 302, 303) arranged on a bedplate (103).
7. Vehicle body (100) according to claim 1 or 2,
-the vehicle body (100) comprises at least one areal vehicle body component (310) as part of a wall of a passenger compartment (101); and is
-the body (100) has at least one fine-tuning point (301, 302, 303) arranged on a flat body part (310).
8. Vehicle body (100) according to claim 1 or 2,
-developing the body (100) to have a nominal frequency curve (204) with respect to the acoustic load within the passenger compartment (101); and is
-fixing the trimming masses (320, 330) at trimming points (301, 302, 303) on the body (100) only if the actual frequency curve (200) with respect to the acoustic load in the passenger compartment (101) deviates from the nominal frequency curve (204); and/or
-fixing the trimming masses (320, 330) at trimming points (301, 302, 303) on the body (100) only if the maximum value (202) of the actual frequency curve (200) exceeds the maximum value (202) of the nominal frequency curve (204); and/or
-fixing the trimming masses (320, 330) at trimming points (301, 302, 303) on the body (100) so that the actual frequency curve (200) of the body (100) to which the trimming masses (320, 330) are fixed approaches the nominal frequency curve (204); and/or
-fixing the trimming masses (320, 330) at trimming points (301, 302, 303) on the body (100) such that the maximum value (202) of the actual frequency curve (200) of the body (100) to which the trimming masses (320, 330) are fixed is reduced compared to the maximum value (202) of the actual frequency curve (200) of the body (100) without trimming masses (320, 330).
9. The vehicle body (100) of claim 1 or 2, wherein the at least one trim point (301, 302, 303) is disposed on the vehicle body (100) such that a maximum (202) of the N frequency curves (200) of the plurality of frequency curves (200) having the N highest maxima (202) is reduced by 30%, 40%, 50% or more.
10. The vehicle body (100) of claim 1 or 2, wherein N =3, 5, 10 or greater.
11. Body (100) according to claim 2, wherein the fixing element (311) is a screw and/or a nut.
12. Vehicle body (100) according to claim 4, wherein said sprayable material is an acoustic insulation material.
13. Vehicle body (100) according to claim 5, wherein the bow (340) is arranged on a roof (102) of the vehicle body (100).
14. The vehicle body (100) of claim 5, wherein the bow (304) extends along a lateral axis of the vehicle body (100).
15. Vehicle body (100) according to claim 6, wherein said deck (103) is a rear window deck.
16. Vehicle body (100) according to claim 7, wherein the planar vehicle body component (310) forms 20% or more of the area of a wall of a passenger compartment (101).
17. The body (100) of claim 8, wherein the trimming masses (320, 330) are fixed at trimming points (301, 302, 303) on the body (100) only if the maximum value (202) of the actual frequency curve (200) exceeds the maximum value (202) of the nominal frequency curve (204) by 20%, 30%, 40%, 50% or more.
18. Method (400) for adjusting acoustic properties of a body (100) of a vehicle, the body (100) comprising a passenger compartment (101) for at least one passenger of the vehicle; the body (100) comprises at least one trim point (301, 302, 303) for fixing a trim mass (320, 330); the method (400) comprises:
-determining (401) whether the actual frequency curve (200) with respect to the acoustic load within the passenger compartment (101) deviates significantly from the nominal frequency curve (204); and is provided with
-fixing (402) a fine tuning mass (320, 330) at a fine tuning point (301, 302, 303), wherein,
-the body (100) is developed based on a mathematical vibration model;
the vibration model has a plurality of parameters, each of which has a possible range of values;
the possible value ranges of the parameters depend on possible tolerances in the manufacture of the body (100) and/or possible inaccuracies and/or uncertainties of the vibration model;
-the vibration model of the body (100) is designed to provide a plurality of frequency curves (200) with respect to the acoustic load in the passenger compartment (101) for a feasible range of values of the plurality of parameters;
-the at least one fine tuning point (301, 302, 303) is arranged on the body (100) such that a maximum (202) of N frequency curves (200) of the plurality of frequency curves (200) having the N highest maxima (202) decreases; and is
-N is an integer and N > 0.
19. The method (400) of claim 18, wherein the method (400) comprises:
-providing a vibration model of the vehicle body (100) designed to provide a plurality of frequency curves (200) with respect to the acoustic load within the passenger compartment (101) for a range of values for which a plurality of model parameters are feasible; and is
-determining the weight of the trimming mass (320, 330) fixed on the trimming point (301, 302, 303) based on the vibration model.
20. The method (400) of claim 18, wherein the fine tuning mass (320, 330) is fixed (402) at the fine tuning point (301, 302, 303) only if it is determined that the actual frequency curve (200) deviates significantly from the nominal frequency curve (204).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018212546.5 | 2018-07-27 | ||
| DE102018212546.5A DE102018212546A1 (en) | 2018-07-27 | 2018-07-27 | Vehicle body with trim point for connecting a trim mass, and method for setting the acoustic properties of a vehicle |
| PCT/EP2019/068234 WO2020020615A1 (en) | 2018-07-27 | 2019-07-08 | Vehicle body having a trim point for attachment of a trim mass, and method for adjusting acoustic properties of a vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112119002A CN112119002A (en) | 2020-12-22 |
| CN112119002B true CN112119002B (en) | 2023-02-21 |
Family
ID=67551497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980032932.5A Active CN112119002B (en) | 2018-07-27 | 2019-07-08 | Vehicle body with a trimming point for connecting a trimming mass and method for adjusting the acoustic properties of a vehicle |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112119002B (en) |
| DE (1) | DE102018212546A1 (en) |
| WO (1) | WO2020020615A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3053630C (en) * | 2017-02-16 | 2023-10-31 | Magna Exteriors Inc. | Infrared welded liftgate assembly and process of making same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1306205A1 (en) * | 2001-10-29 | 2003-05-02 | Johnson Controls GmbH | Covering element for the interior of a vehicle and method for fabricating the same |
| EP1614927A1 (en) * | 2004-07-09 | 2006-01-11 | Nissan Motor Co., Ltd. | Vehicle roof structure with dampening bracket |
| CN102013251A (en) * | 2009-09-07 | 2011-04-13 | 雅马哈株式会社 | Acoustic resonance device |
| CN102295027A (en) * | 2007-04-12 | 2011-12-28 | 株式会社久保田 | Vehicle with a cabin |
| CN106553594A (en) * | 2015-09-30 | 2017-04-05 | 通用汽车环球科技运作有限责任公司 | Panel assembly with noise attentuation system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6127797Y2 (en) * | 1978-08-21 | 1986-08-19 | ||
| JP4471506B2 (en) * | 2001-01-19 | 2010-06-02 | 本田技研工業株式会社 | Vibration reduction device for automotive plate materials |
| JP2006007862A (en) * | 2004-06-23 | 2006-01-12 | Mazda Motor Corp | Floor panel structure of vehicle body |
| US7409269B2 (en) * | 2006-11-15 | 2008-08-05 | Magna Steyr Fahzeugtechnik Ag & Co Kg | Methods of analyzing the vibro-acoustic optimization potential and optimizing the vibro-acoustic behavior of a structure |
-
2018
- 2018-07-27 DE DE102018212546.5A patent/DE102018212546A1/en active Pending
-
2019
- 2019-07-08 WO PCT/EP2019/068234 patent/WO2020020615A1/en active Application Filing
- 2019-07-08 CN CN201980032932.5A patent/CN112119002B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1306205A1 (en) * | 2001-10-29 | 2003-05-02 | Johnson Controls GmbH | Covering element for the interior of a vehicle and method for fabricating the same |
| EP1614927A1 (en) * | 2004-07-09 | 2006-01-11 | Nissan Motor Co., Ltd. | Vehicle roof structure with dampening bracket |
| CN102295027A (en) * | 2007-04-12 | 2011-12-28 | 株式会社久保田 | Vehicle with a cabin |
| CN102013251A (en) * | 2009-09-07 | 2011-04-13 | 雅马哈株式会社 | Acoustic resonance device |
| CN106553594A (en) * | 2015-09-30 | 2017-04-05 | 通用汽车环球科技运作有限责任公司 | Panel assembly with noise attentuation system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018212546A1 (en) | 2020-01-30 |
| WO2020020615A1 (en) | 2020-01-30 |
| CN112119002A (en) | 2020-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102174283B1 (en) | Suspension control unit | |
| US7062049B1 (en) | Active noise control system | |
| EP1855270A2 (en) | Improvements in or relating to noise estimation | |
| KR20170063594A (en) | Adjustable chassis for a motor vehicle | |
| CN112119002B (en) | Vehicle body with a trimming point for connecting a trimming mass and method for adjusting the acoustic properties of a vehicle | |
| US8974003B2 (en) | Rear seat cushion sound reduction mat | |
| US11124051B2 (en) | Hybrid door module | |
| US20070092690A1 (en) | Interior finishing component for a motor vehicle | |
| US11958412B2 (en) | Structure and method for mounting flag-type side mirror | |
| US20160075381A1 (en) | Axle Support of a Vehicle | |
| JP2022533631A (en) | Sound cancellation using microphone projection | |
| JP2007219262A (en) | Active vibrating noise controlling apparatus | |
| WO2010055336A1 (en) | A bulkhead | |
| US8378254B2 (en) | Adaptive vehicle manufacturing system and method | |
| US11135983B2 (en) | Acoustic damping part, method for producing a sound-insulated vehicle body and motor vehicle | |
| EP3414469B1 (en) | Vehicle collision energy absorbance with magnetorheological or electrorheological material and method for controlling stiffness of energy absorbance element | |
| US11084543B2 (en) | Active aero device to attenuate wind throb | |
| CN110712687A (en) | Motor vehicle floor assembly | |
| JP2007296887A (en) | Noise reducing device and method | |
| JP2010202073A (en) | Apparatus and method for controlling noise | |
| CN110103863A (en) | The vehicle noise of vehicle body installation eliminates system | |
| US11130453B2 (en) | Sound management system for a vehicle | |
| Valeri et al. | Practical Uses for Road Noise Cancellation | |
| WO2022200024A1 (en) | Method for operating a door of a motor vehicle | |
| JP5716890B2 (en) | Vehicle luggage rack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |