Design Of QTZ40Tower Crane And Its Performance Analysis

With the building and its height increases, there will be more and more tower cranesare used, so the rational design of the tower crane will be directly related to the its safetyperformance, efficiency and economy. At present, some researchers in domestic investigatethe tower crane with static analysis and modal analysis by the finite element analysissoftware, while some researchers with transient dynamics analysis, harmonic responseanalysis by the software ANSYS. Few people use software ADAMS to investigate the towercrane with rigid-flexible coupling dynamics simulation analysis. Dynamic analysis can bevery effective way of the dynamic performance of the tower crane by software ADAMS; itcan better simulate the actual work state of the tower crane. This research has a betterguidance for the future design of the tower crane, there can be reduce the development cycleand cost savings of the tower crane by using the software to assist in the design and analysisof the tower crane.This article is based on the design of tower crane QTZ40, the finite element analysissoftware ANSYS,3D modeling software UG and mechanical system dynamics analysissoftware ADAMS were used for the analysis of the tower crane. There are several aspects ofthe article as following:1. The background，the develop current situation and development trend of the towercrane were briefly described and some basic theories were given. The design parameters andcriteria of the tower crane QTZ40were listed; the overall program design of the tower craneQTZ40was completed.2. The finite element modeling of the tower crane was built by the finite elementanalysis software ANSYS, and its two typical conditions of static analysis was investigated.The maximum stress location and the maximum displacement value under two conditionswere obtained, The results shows the maximum stress of the tower crane less than theallowable stress, meet the requirements of the strength of the tower crane, and there is acertain amount of material remaining.3. Modal analysis of the towered crane was investigated, the modal natural frequenciesand modes figure certificated that tower crane for low-frequency vibration system. Ordervibration mode diagram were summarized and analyzed.4. The interface between UG and ADAMS was used to build the virtual prototype model of the tower crane; the modal neutral file of the crane boom was generated withANSYS and then imported to ADAMS to replace the file of the virtual prototype model ofthe lifting boom rigid body.5. The simulation under two lifting conditions of the rigid-flexible coupling model wasanalyzed, the lifting dynamic load curve could be obtained, and The lifting dynamic loadimpact on the tower crane when it is working were analyzed in the end.