Simulation Of Continuous Cable Element In Multi-slip State

As one of the important components of the spatial structure,the cable has the advantages of small dead weight,high efficiency,large span,and cost saving,which make it occupy an important position in light and efficient structures such as string beams,cable systems,and chord support domes.Whether the cable is in the construction stage of the tension forming or the use stage after the construction is completed,the problem of the sliding motion of the cable and the various sliding state problems existing in the sliding process cannot be avoided.In order to solve such problems,on the basis of consulting a large number of domestic and foreign literatures,the total original length of the cable element is redistributed to each cable segment during the calculation,and a multi-slip state continuous cable element is created to replace the actual cable for calculation.And the practicality of the algorithm is verified by examples such as string chord beam and cable hoisting system.The theoretical basis of multi-slip state continuous cable mainly refers to the use of two curvilinear forms of curved cables and corresponding form finding calculations;the total stiffness matrix and total stiffness equation of straight cables in the overall coordinate system are derived;The theory of straight cables derives the calculation theory of continuous cables,and the stiffness matrix,mass matrix and stress stiffening matrix of continuous cables are obtained.However,the impact of friction in practical engineering cannot be ignored,and two different friction theories are discussed here.The core of the multi-slip state continuous cable theory is to create a multi-slip state continuous cable element to simulate the cable in actual engineering.To describe the behavior of cable slip through the motion of the multi-slip state continuous cable element,first of all,the cable element The slip section of the cable is determined.After the determination,the multiple slip states of the continuous cable element can be distinguished,and it is expressed in numerical form,and the original length of the cable segment is redistributed using the slip state expressed in numerical form to obtain the final cable.The original length of the segment is used to calculate the internal force of the cablesegment.Using the theory of this article to combine with the secondary development of ANSYS,it is necessary to develop the three-dimensional rod element through the function of UPFs,and write the continuous cable element after development into the ANSYS element library using FORTRAN language to match with the existing ANSYS element Use to improve the scope of application of continuous cable elements.By applying the multi-slip state continuous cable element to practical projects such as multi-node continuous cable,string beam and cable hoisting system,the analysis results verify the reliability of the data analysis theoretical calculation method proposed in this paper and the correctness of the calculation results and data analysis The theoretical feasibility of the theory is compared with the actual calculation results of other literatures or other data analysis methods scholars’ opinions and opinions.