Step-by-step decoupling method for inverse substructuring analysis of a three-component coupled packaging system

et al. 2017

Packag. Technol. Sci.

Self Cite

The inverse sub-structuring method can predict the component-level frequency response functions (FRFs) of product (critical component) for product transport system from only measured system-level FRFs, facilitating the cushioning packaging design. However, the FRFs of the coupling interface between product and vehicle are usually of extreme difficulty to be measured due to the limited accessible space. To overcome this difficulty, the authors suggested a so-called FRF probe technique method in the previous study, which may be more suitable for the single-coordinate coupled system. In practice, most of the product transport systems should be treated as multi-coordinate coupled system. The aim of this paper is to derive a new FRF-based inverse sub-structuring method for multi-coordinate rigidly coupled product transport system and develop a new shearing probe technique to obtain the difficult-to-monitor FRFs at the coupling interface, which will be validated by a lumped mass model and finite element models, respectively, showing perfect agreement. Finally, the experiment on a physical prototype of multi-coordinate rigidly coupled product transport system is performed to further check the feasibility of the application prospect of the shearing probe technique for inverse analysis of product transport system. The method proposed in this study will provide the packaging designers an alternative method to monitor the integrity of product transport system.

Section: Introductionmentioning

confidence: 99%

Inverse Sub-structuring Method for Multi-coordinate Rigidly Coupled Product Transport System based on a Novel Shearing Probe Technique

Meng

et al. 2017

Packag. Technol. Sci.

Self Cite

“…Zhang applied the methods to study the dynamics of refrigerator‐truck transport system by applying the inverse sub‐structuring method and obtained the FRFs for refrigerator accurately, indicating the great application prospect of the inverse sub‐structuring method for real product transport system. To apply the inverse sub‐structuring method more efficiently for most engineering systems, Wang J . proposed the step‐by‐step decoupling method for inverse analysis of multi‐component coupled system.…”

Section: Introductionmentioning

confidence: 99%

“…To apply the inverse sub-structuring method more efficiently for most engineering systems, Wang J. 9 proposed the step-by-step decoupling method for inverse analysis of multicomponent coupled system. Moreover, he derived the inverse sub-structuring method for multicoordinate coupled product transport system 10 and obtained the general formulations of inverse sub-structuring method for multi-coordinate coupled system.…”

Section: Introductionmentioning

confidence: 99%

Inverse Sub‐Structuring Theory for Coupled Product Transport System Based On the Dummy Masses Method

et al. 2016

Packag Technol Sci

Self Cite

It is of high importance to predict the components frequency response functions (FRFs) for obtaining the coupled product transport system's response. However, the components behaves much differently when coupled with another components compared with that in free state. Inverse sub‐structuring method has been recently proposed and applied for inverse analysis of the dynamical response of coupled product transport system. The component‐level FRFs and the coupling dynamic stiffness are all predicted from only the system‐level FRFs, facilitating the engineering design for product transport system. However, in most engineering application practices, the system‐level FRFs from coupling degrees of freedom may not be measured accurately because of the difficulties of vibration excitation and/or response measurement for the coupled interface between components within the limited accessible space. The aim of this paper is to develop a new FRF‐based indirect inverse sub‐structuring method for the analysis of the dynamic characteristics of a two‐component coupled product transport system without measuring system‐level FRFs at the coupling degrees of freedom. A so‐called dummy masses method is developed and applied for predicting the unmeasured FRFs at the coupling degrees of freedom, and the inverse sub‐structuring approach based on the dummy mass method is derived for inverse analysis of coupled product transport system, which is further verified by a lumped‐mass model, showing exact agreement. Finally, the experiment on a physical prototype of two‐substructure coupled product transport system is performed to further check the accuracy of the suggested method. The new method shows its great application prospect in coupled product transport system.

“…Then, the method was applied to a real refrigerator‐truck system . Most recently, Wang further developed the inverse sub‐structuring method for multi‐component coupled system . The inverse sub‐structuring method for a three‐component coupled system with single coordinate coupling and/or multi‐coordinate coupling was proposed and applied to perform the parameter analysis of product transport system.…”

Section: Introductionmentioning

confidence: 99%

Inverse Sub‐structuring Method for Rigidly Coupled Product Transport System based on Frequency Response Function Testing Probe Technique

Sun

et al. 2016

Packag Technol Sci

Self Cite

The inverse sub-structuring method has been recently proposed and applied for inverse analysis of product transport system, to predict the component-level frequency response functions (FRFs) and the coupling dynamic stiffness from only the system-level FRFs. However, previous applications of this method were all developed based on the assumption that the components were coupled by flexible couplings. Actually, increasing more components are welded or bolted to construct a coupled system, which should be treated as rigidly coupled system. The aim of this paper is to derive a new FRF-based inverse sub-structuring method for the analysis of the dynamic characteristics of a two-component coupled product transport system with rigid couplings. And then a so-called FRF testing probe technique is proposed and applied to measure the difficult-to-monitor FRFs at the coupling interface. The developed method is verified by a lumped-mass model, showing exact agreement. Finally, the experiment on a physical prototype of two-substructure coupled product transport system is performed to further check the accuracy of the suggested method. The proposed method is an extension of previous inverse sub-structuring method and may help to obtain the main controlling factors and contributions from the various structure-borne paths for product transport system.