Study Of Hoisted Mechanics Model And CAD Application Based On Derrick

The integrated installation technique of mast-crane, as a wide used installation technique in the civil engineer filed, is one of the ten latest technologies of extended and applied emphatically in civil engineer put forward by the Ministry of Construction. However, the hoisted design of mast-crane is generally taken by hand at present, and moreover, the reliability and security is lacked in the design bases on the old mechanics model. Therefore, the dissertation emphasizes on the study of the hoisted system of mast-crane of steel framework applied widely, researches and amends the old mechanics model, and develops a hoisted CAD system of mast-crane of steel framework named WGCAD 1.0 to meet the need of design in civil engineer.This dissertation introduces the development of the mast-crane of steel framework in the civil engineer filed and the application of CAD technology in the hoisted engineer field, and introduces two tools: a Visual Basic 6.0 development environment and a Access database development environment, used in the development of the hoisted CAD system of mast-crane of steel framework. This paper describes the method of developing the hoisted CAD system of mast-crane of steel framework in detail.From the point of view of systems engineering, this dissertation regards the hoisted system of mast-crane of steel framework as a whole system in the course of research, considers the influence of many factors included the nonlinear of hawser, the second-order analysis of mast-crane, the wind-induced-vibration response and the standardization of the non-normal equipments to mechanics performance of main body of mast-crane and amends the illogical factors of the old mechanics model of mast-crane. At the same time, from the point of view of optimization of system design, this dissertation analyzes mutual influences between the main body and secondary body in the system of mast-crane, put forward a logical mechanics model of mast-crane, meets the demand for the optimal design of the hoisted system of mast-crane.From the point of view of the designer of the hoisted system of mast-crane, this paper makes use of the new mechanics model to develop the hoisted CAD system of mast-crane of steel framework (WGCAD 1.0). This software is that adopts a Visual Basic 6.0 development environment and Access database development environment as two development tools and simulates the idea of designer can be applied in civil engineer conveniently.