Twinning simulation and model test for construction error assessment of cable truss structures
The construction process of cable structures is complicated,and the construction errors are highly unpredictable,which has a negative impact on the structural safety.Existing research of the influence of construction error on structural mechanical performance has issues such as a lack of consistency in the model,insufficient accuracy and efficiency.Therefore,twinning simulation and model test of construction error assessment for cable truss structure were carried out.Parametric model and construction error space model of cable truss were developed,and the nonlinear mapping relationship between influencing factors and structural mechanical properties was obtained.Driven by the proposed construction error assessment method,parametric analysis considering four basic input parameters was conducted,and the change law of structural stress performance under the coupling of different types of construction errors was derived.Using the cable truss structure with rigid ring as an example,a digital twin simulation platform was developed to assess the effectiveness of the evaluation method further.The results show that the data mapping relationship based on digital twins can effectively obtain the mechanical property under the influence of construction error.The mechanical property of the test model obtained by the evaluation method is highly consistent with the test values,confirming the feasibility of the method.Based on the parametric analysis of twin simulation platform,reducing the radial cable size and increasing the cable force are effective measures to reduce the influence of construction error.To meet the requirement that the cable force error must not exceed±10％,a construction error control index was formulated.In order to meet the self-forming stress of the structure,the length error under the most unfavorable combined working condition should be controlled within 1/350 of the cable length.
国家科技期刊平台
NSTL
万方数据
维普
