| Civil Engineering |
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| Distributed indeterminacy evaluation of cable-strut structures: formulations and applications |
| Jin-yu Zhou, Wu-jun Chen, Bing Zhao, Zhen-yu Qiu, Shi-lin Dong |
| 1Space Structures Research Center, Shanghai Jiao Tong University, Shanghai 200240, China; 2School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 3College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China |
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Abstract The indeterminacy evaluation is an effective method for system identification; it can predict the mechanical behaviors of flexible structures in the primary design. However, the conventional indeterminacy evaluation based solely on geometry and topology has neglected the influence of material properties on mechanical behavior and the contribution of each component to the total indeterminacy. To address these issues, a distributed indeterminacy evaluation taking account of the effect of component stiffness was carried out with a view to providing reasonable interpretations and feasible applications for two concepts, i.e., the distributed static indeterminacy (DSI) and the distributed kinematic indeterminacy (DKI). A unified method for the DSI is proposed, and a comparative analysis between this and an existing method revealed that the proposed method has a wider range of applicability and is essentially identical in the kinematically determinate case. It can be concluded that since the DSI is representative of symmetric properties, a simple but efficient grouping criterion can be established which can improve the efficiency of the specific force finding method entitled double singular value decomposition (DSVD). On the other side, an evaluable method for the DKI is proposed suggesting that DKI is a useful indicator for the assessment of nodal mobility and can provide a feasible solution to the form transforming study.
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Received: 07 April 2015
Published: 03 September 2015
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