Finite element analysis on the stress state of rope hoisting equipment based on the ABAQUS
This paper presents a simulation of the steel wire rope of a certain type hoisting equipment to explore the distributions of stress and deformation in the process of lifting heavy loads. The SolidWorks software was used to establish the 3D solid model of the 6*6+WS structure of stone cross strand wire rope for a certain lifting equipment. Then the solid model of steel wire rope was imported into the ABAQUS directly through the SolidWorks and ABAQUS interface plugin, the material properties were defined, the contact pairs were established, the model was meshed, and the constraints were applied to solve the finite element model. In the normal working range of the wire rope, axial tension of 5000 N was loaded to analyse the stress and deformation distributions. The results show that the stress of wire rope presents a space spiral distribution and the stress of the lateral steel wire of the rope strand is the largest of the steel wire rope, which will provide reference for the design and improvement of the steel wire rope.
Research on Dynamic Characteristics of Lifting Rope-Breaking for the Nuclear Power Crane
The nuclear power crane is an important equipment for handling operation in nuclear power plants. The nuclear power crane is equipped to complete the operation even in its own short-time rope-breaking failure state. Therefore, it is necessary to study the possible failure dynamic characteristics and safety of the nuclear power crane. The coupling modeling of the real structure and mechanism of a nuclear power crane is carried out, and the dynamic formula of its rope-breaking failure state is derived. The high-precision three-dimensional model is established, which considers the flexibility of the wire rope and simulates the winding of the wire rope in the pulley groove and the tangency contact relation between the wire rope and the pulley, so as to realize the orderly winding of the wire rope in the space between all the lifting pulleys, making the model both real and easy to solve. For the special spatial parallel winding mode of double wire ropes, the failure dynamic characteristics of the nuclear power crane when one wire rope breaks suddenly and the other one is still able to suspend the lifting weight in the air is studied. The simulation results show that one wire rope in the system fails suddenly under the condition of failure lifting, and the special wire rope winding mode makes the lifting weight remain suspended and continue to lift. From the view of the wire rope stress, the stress of the other wire rope becomes twice of the original after the sudden failure of one wire rope. At the same time, the balance lever and spring buffer device also play an effective buffering role after a sudden failure. The special winding mode of the wire rope and pulley makes the two wire ropes bear the lifting weight jointly.
Evaluation of buckling load and dynamic performance of steel shear wall retrofitted with strips made of shape memory alloy
One of the most imperfections of the steel shear wall is out of plane displacements that cause severe damage in both structural and non-structural elements. In this paper, the effects of shape-memory alloys on steel shear walls are investigated. First, a numerical analysis using the finite element method in ABAQUS software has been carried out according to an experimental test. The results of the numerical analysis have been verified with experimental results. Next, shape-memory alloy fibers have been added vertically and horizontally to various parts of the steel shear wall. The results show that retrofitting with the shape-memory alloy reduces the out-of-plane displacement of the steel shear wall under both cyclic and seismic loadings. Besides, the buckling load in the steel shear wall increases when it is retrofitted with the shape-memory alloy. Also, the total out-of-plane movement (accumulated absolute displacements) of the steel shear wall and non-structural damage are controlled by the characteristic of a shape-memory alloy material called “super-elastic”.