| Builder’s hoist is mainly used for the vertical transportation of personnel and materials inthe construction operations.Builder’s hoist has not been a major breakthrough in themechanical structure, the overall installation program, parts calculation and analysis of themechanical properties though it development of many years.So corporate R&D investmentis not enough. Introduced finite element analysis and virtual prototyping in the developmentprocess of the builder’s hoist. and analysis of dynamic and static mechanical properties of themain structure. The use of output parameters and results of calculation and simulation toverify the calculation of the strength of checking construction lifts state and stiffness thenprovide a reference for the structural design and improved. The main work done as follows:1. Combining of analytical and finite element techniques, suggest a method for calculatingthe checking builder’s hoist rail rack anti-tipping stability. Use of the method for solving themaximum reaction forces attached to the wall frame wall, thus calculated checking boltstrength through the wall which is the inheritance of the traditional torque method; Problemssolved simultaneously rail frame and attached to the wall frame maximum stress, and railframe deformation amount calculated checking rail frame strength and stiffness, solvedifficult mechanical model to simplify using traditional analytical method, stress, straincalculation error. Finally, the size of the reaction forces, anti-tipping stability method tosimplify the calculation of rail frame, provides a good theoretical basis for the high-riseconstruction lift rail frame erection.2. A method for computing hoists the strength and stiffness of the structure to establish asteel mechanical model construction elevator cage, the cage structure of a particular model ofstrength and stiffness were calculated checking, to verify the calculation checkingmethodcorrectness, and the cage structure local improvements; modal analysis of the steelstructure of the cage, made clear its starting, braking, and vibration characteristics in normalconditions, the cage structure dampingtheoretical basis; Finally, the problems of the existingcage structure design, manufacturing, process analysis, by the overall improvement to avoidmanufacturing and workmanship defects.3. Proposed a rack contact analysis method based on virtual prototyping technology and finite element analysis. Establish the construction elevator virtual prototype model, simulation,and evaluate the transmission gear in normal operating conditions alternating load curves andvariable torque curve. Sampling and fitting curve data, sorted out a mathematical expressionfor fatigue life analysis provides the raw data for reference; simulation results combined withthe finite element techniques to solve a gear in the alternating load stress curve relative to theconstant-torque gear rack the contact analysis this is a breakthrough, new ideas and methodsfor the calculation of the rack checking.The research of this paper provides scientific basis and theoretical reference for the designand analysis of builder’s hoist. |
