CN104198142A - Method for calibrating equivalent dynamic stiffness of packaging coupling interface - Google Patents

Method for calibrating equivalent dynamic stiffness of packaging coupling interface Download PDF

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Publication number
CN104198142A
CN104198142A CN201410460688.1A CN201410460688A CN104198142A CN 104198142 A CN104198142 A CN 104198142A CN 201410460688 A CN201410460688 A CN 201410460688A CN 104198142 A CN104198142 A CN 104198142A
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China
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dynamic stiffness
packaging
psi
coupled interface
measuring
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CN201410460688.1A
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Chinese (zh)
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王军
段芳
卢立新
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Jiangnan University
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Jiangnan University
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Abstract

The invention discloses a method for calibrating equivalent dynamic stiffness of a packaging coupling interface and belongs to the field of packaging. The method is characterized by the basis on measured horizontal transfer functions HA<o(a)c1(a)>, HA<c1(a)c1(a), HB<c1(b)c1(b), HB<c1(b)c2(b), HB<c2(b)c2(b)>, HC<c2(c)i(c)> and HC<c2(c)c2(c) of a part and horizontal transfer functions HS<o(a)i(c), HS<c1(a)c1(a), HS<c1(a)c1(b)> and HS<c1(b)c1(b)> of the system. The method includes steps of arranging an acceleration sensor on a quick-wear part, a cargo and a vehicle respectively, measuring the horizontal transfer functions HA<o(a)c1(a)>, HA<c1(a)c1(a), HB<c1(b)c1(b), HB<c1(b)c2(b), HB<c2(b)c2(b)>, HC<c2(c)i(c)> and HC<c2(c)c2(c) of the part; arranging a sensor in an assembled product transport and package system and measuring the horizontal transfer functions HS<o(a)i(c), HS<c1(a)c1(a), HS<c1(a)c1(b)> and HS<c1(b)c1(b)> of the system; directly calculating dynamic stiffness of the packaging coupling interface according to the measured horizontal transfer functions of the part and the system. By the method, the dynamic stiffness of the packaging coupling interface is predicted completely on the basis of the transfer functions, and the required horizontal transfer functions of the system is not needed to be subjected to excitation or vibration pickup on the packaging coupling interface, so that the method for calibrating equivalent dynamic stiffness of the packaging coupling interface has the advantages of convenience in engineering application, high precision and the like.

Description

A kind of method of measuring packaging coupled interface equivalence dynamic stiffness
Technical field
The present invention relates to pack coupled interface parameter recognition technology field, especially relate to the method for testing of packaging coupled interface equivalence dynamic stiffness.
Background technology
To there is damaged phenomenon in product very serious in logistics, and the economic loss causing is thus huge.Protective packaging can effectively reduce the logistics loss of product, and the basis of its design is the dynamic stiffness according to wrapper interface.For packaging coupled interface, generally include inner liner, extranal packing box, pallet and other auxiliary stationary installations etc., their performance lump row has become the dynamic stiffness of complicated packaging coupled interface.In the time that dynamic stiffness is larger, the response of packaged product may be amplified and be caused product breakage, when dynamic stiffness hour, the distortion meeting of padded coaming is very large, thereby requires the volume of packing container to increase, and causes thus excessive packaging.Therefore, can say, the core of protective packaging design is to determine suitable packaging coupled interface dynamic stiffness.The method of testing (comprising time domain approach, frequency domain method etc.) of the many interfaces dynamic stiffness growing up in mechanical vibration technical field of measurement and test, need high-precision instrument and equipment, need a large amount of measuring points, simultaneously also very high to the requirement of experimental technique itself.Meanwhile, the problem that existing method cannot ensure for the test ubiquity precision of the complexity that the comprises multiple unit packaging coupled interface dynamic stiffness of addressing above, particularly, due to the restriction of the physical space of packaging coupled interface own, is difficult to exciting and pick-up.
Summary of the invention
The object of the present invention is to provide a kind of method that measuring accuracy is high, apply easy measurement packaging coupled interface dynamic stiffness without special measurement instrument, engineering.
The invention provides the method for testing for packing coupled interface dynamic stiffness, it is characterized in that: utilized system level transport function and the horizontal transport function prediction of parts that can be easy to measure to pack coupled interface dynamic stiffness, avoid, in packaging coupled interface exciting and pick-up, comprising the steps:
(1) to components A (consumable accessory), B (goods), C (vehicle) arranges respectively acceleration transducer, the transfer function H of measurement component level ao (a) c1 (a), H ac1 (a) c1 (a), H bc1 (b) c1 (b), H bc1 (b) c2 (b), H bc2 (b) c2 (b), H cc2 (c) i (c), H cc2 (c) c2 (c), wherein H xijrepresent that parts X firmly hammers exciting into shape at j point, for example, at the sensor pick-up of i point, the transport function obtaining, H aoac1arepresent from c 1the transport function that a point is ordered to oa, other are roughly the same;
(2) to the product transportation package system assembling, placement sensor, the transfer function H of measuring system level so (a) i (c), H sc1 (a) c1 (a), H sc1 (a) c1 (b), H sc1 (b) c1 (b);
(3), according to the horizontal transport function of parts and the system level transport function that record, directly calculate the dynamic stiffness of packaging coupled interface.Computing formula is as follows:
K BC = { H Cc 2 ( c ) i ( c ) H So ( a ) i ( c ) - 1 H Ao ( a ) c 1 ( a ) ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Bc 2 ( b ) c 2 ( b ) + H Bc 1 ( b ) c 2 ( b ) T ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Cc 2 ( c ) c 2 ( c ) } - 1
Wherein, &Psi; = H Sc 1 ( a ) c 1 ( b ) - H Sc 1 ( a ) c 1 ( a ) H Sc 1 ( a ) c 1 ( b ) - T H Sc 1 ( b ) c 1 ( b )
The present invention compared with prior art, has remarkable advantage:
(1) need to be in packaging coupled interface exciting or pick-up, avoid the low problem of measuring accuracy causing due to packaging coupled interface physical space limitations.
(2) the needed system level transport function of formula and the horizontal transport function of parts of calculating dynamic stiffness can be obtained by experiment test completely, have avoided FEM (finite element) calculation or the theoretical modeling dependence to model accuracy.
Brief description of the drawings
Fig. 1 Product transport system standard check point schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
The method that the present invention measures packaging coupled interface equivalence dynamic stiffness comprises the following steps:
(1) damaged condition in actual logistics transportation according to goods, determines goods consumable accessory A, and measures the transfer function H of consumable accessory parts level ao (a) c1 (a), H ac1 (a) c1 (a);
(2) measure the transfer function H of goods in free state lower component level bc1 (b) c1 (b), H bc1 (b) c2 (b), H bc2 (b) c2 (b);
(3) measure the transfer function H of vehicle under free state cc2 (c) i (c), H cc2 (c) c2 (c);
(4) by consumable accessory A, goods B, vehicle C connects according to the assembling coupling scheme in actual logistics progress, and wherein the coupled interface between goods and vehicle is packaging coupled interface (Fig. 1);
(5) measure the transfer function H of Product transport system S (Fig. 1) system level under state of being of coupled connections so (a) i (c), H sc1 (a) c1 (a)h sc1 (a) c1 (b), H sc1 (b) c1 (b);
(6) application following formula calculates packaging coupled interface dynamic stiffness
K BC = { H Cc 2 ( c ) i ( c ) H So ( a ) i ( c ) - 1 H Ao ( a ) c 1 ( a ) ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Bc 2 ( b ) c 2 ( b ) + H Bc 1 ( b ) c 2 ( b ) T ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Cc 2 ( c ) c 2 ( c ) } - 1
Wherein, &Psi; = H Sc 1 ( a ) c 1 ( b ) - H Sc 1 ( a ) c 1 ( a ) H Sc 1 ( a ) c 1 ( b ) - T H Sc 1 ( b ) c 1 ( b ) .
Subscript in formula " 1 " representing matrix inversion operation; " T " representing matrix transposition.
Above-mentioned (1), (2), (3), (5) in step, the measurement of transport function can be obtained by " the exciting test " of simple maturation, complete by " power hammer-accelerometer-multi-channel signal acquiring analytic system " hardware testing system, this system is public physical construction kinetic test analytic system, mainly comprise the power hammer that exciting is used, one group of sensor-accelerometer of vibratory response test use, and multi-channel signal acquiring analytic system, as domestic DASP intelligent signal energy acquisition processing system, 16 or 32 passages, external as LMS, the systems such as BK, multi-channel signal acquiring analyser is mainly by advance signal regulator, (time-frequency Dynamic Signal reads for analog to digital converter and software kit, analyze, show, output, the functions such as printing etc.).
Above-described embodiment is the embodiment that the present invention recommends, but embodiments of the present invention are not restricted to the described embodiments,
Other any do not deviate from the amendment made under core essence of the present invention and principle, substitutes, combination, simplify and all should be equivalent substitute mode, within being included in protection scope of the present invention.

Claims (4)

1. a method of measuring packaging coupled interface equivalence dynamic stiffness, is characterized in that, comprises the steps:
(1) to consumable accessory, goods, vehicle is arranged respectively acceleration transducer, the transfer function H of measurement component level ao (a) c1 (a), H ac1 (a) c1 (a), H bc1 (b) c1 (b), H bc1 (b) c2 (b), H bc2 (b) c2 (b), H cc2 (c) i (c), H cc2 (c) c2 (c), wherein H xijrepresent that parts X firmly hammers exciting into shape at j point, for example, at the sensor pick-up of i point, the transport function obtaining, H aoac1arepresent from c 1the transport function that a point is ordered to oa, other are roughly the same;
(2) to the product transportation package system assembling, placement sensor, the transfer function H of measuring system level so (a) i (c), H sc1 (a) c1 (a), H sc1 (a) c1 (b), H sc1 (b) c1 (b);
(3), according to the horizontal transport function of parts and the system level transport function that record, directly calculate the dynamic stiffness of packaging coupled interface.Computing formula is as follows:
K BC = { H Cc 2 ( c ) i ( c ) H So ( a ) i ( c ) - 1 H Ao ( a ) c 1 ( a ) ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Bc 2 ( b ) c 2 ( b ) + H Bc 1 ( b ) c 2 ( b ) T ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Cc 2 ( c ) c 2 ( c ) } - 1
Wherein, &Psi; = H Sc 1 ( a ) c 1 ( b ) - H Sc 1 ( a ) c 1 ( a ) H Sc 1 ( a ) c 1 ( b ) - T H Sc 1 ( b ) c 1 ( b ) .
2. a kind of method of measuring packaging coupled interface equivalence dynamic stiffness according to claim 1, is characterized in that, the frequency response function of described measurement comprises: the horizontal transfer function H of parts ao (a) c1 (a), H ac1 (a) c1 (a), H bc1 (b) c1 (b), H bc1 (b) c2 (b), H bc2 (b) c2 (b), H cc2 (c) i (c), H cc2 (c) c2 (c)transfer function H with system level so (a) i (c), H sc1 (a) c1 (a), H sc1 (a) c1 (b), H sc1 (b) c1 (b).
3. a kind of method of measuring packaging coupled interface equivalence dynamic stiffness according to claim 2, is characterized in that, the system level transport function of required measurement need to be in packaging coupled interface exciting or pick-up.
4. a kind of method of measuring packaging coupled interface equivalence dynamic stiffness according to claim 2, is characterized in that, the computing formula of rigidity is
K BC = { H Cc 2 ( c ) i ( c ) H So ( a ) i ( c ) - 1 H Ao ( a ) c 1 ( a ) ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Bc 2 ( b ) c 2 ( b ) + H Bc 1 ( b ) c 2 ( b ) T ( H Ac 1 ( a ) c 1 ( a ) + H Bc 1 ( b ) c 1 ( b ) - &Psi; ) - 1 &CenterDot; H Bc 1 ( b ) c 2 ( b ) - H Cc 2 ( c ) c 2 ( c ) } - 1
Wherein, &Psi; = H Sc 1 ( a ) c 1 ( b ) - H Sc 1 ( a ) c 1 ( a ) H Sc 1 ( a ) c 1 ( b ) - T H Sc 1 ( b ) c 1 ( b ) .
CN201410460688.1A 2014-09-11 2014-09-11 Method for calibrating equivalent dynamic stiffness of packaging coupling interface Pending CN104198142A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000065675A (en) * 1998-08-25 2000-03-03 Toppan Printing Co Ltd Package measuring and analyzing system
CN1609578A (en) * 2004-11-25 2005-04-27 上海交通大学 Dynamic stiffness test system for large high-speed dynamic balancer oscillating frame
DE102009033137A1 (en) * 2009-07-15 2011-02-03 Schaeffler Technologies Gmbh & Co. Kg Linear guide for machine tool, has sensor unit comprising vibration sensor for detecting vertical vibrations of guiding carriage and acceleration sensor for detecting horizontal acceleration of guiding carriage
CN102072806A (en) * 2010-11-25 2011-05-25 南京理工大学 Device for testing dynamic characteristic parameters of fixed joint surface and testing method thereof
CN103808499A (en) * 2014-01-21 2014-05-21 江苏科技大学 Method and device for testing dynamic stiffness of vibration isolator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000065675A (en) * 1998-08-25 2000-03-03 Toppan Printing Co Ltd Package measuring and analyzing system
CN1609578A (en) * 2004-11-25 2005-04-27 上海交通大学 Dynamic stiffness test system for large high-speed dynamic balancer oscillating frame
DE102009033137A1 (en) * 2009-07-15 2011-02-03 Schaeffler Technologies Gmbh & Co. Kg Linear guide for machine tool, has sensor unit comprising vibration sensor for detecting vertical vibrations of guiding carriage and acceleration sensor for detecting horizontal acceleration of guiding carriage
CN102072806A (en) * 2010-11-25 2011-05-25 南京理工大学 Device for testing dynamic characteristic parameters of fixed joint surface and testing method thereof
CN103808499A (en) * 2014-01-21 2014-05-21 江苏科技大学 Method and device for testing dynamic stiffness of vibration isolator

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
洪翔 等: "多点耦合包装系统动态逆子结构理论试验验证", 《包装技术与工程》 *
王军 等: "复杂包装耦合界面动态性预测的改进逆子结构理论", 《包装学报》 *

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Application publication date: 20141210