Optimization Design Research On Truss Boom Of Crane

With the rapid development of the world, kinds of large and larger engineering project, such as water conservancy, hydropower, thermal power, nuclear power engineering project, and urban construction need for the lifting altitude and lifting capacity improvemrnt and the crane boom weight decrease. In order to meet the requirements, the crane boom need be optimized. Structural optimization theory has been developed, but most focused on solving a particular issue of structural design. The research results ware difficult to be applied to complexity of the engineering problems and was mastered by designer. Therefore, researching the crane truss structure optimization method, and exploring the structural design of the relevant laws of cranes had a great significance for c lightweight and series design crane.Truss boom of DR1250 tower crane is taken as the research object. The boom structure optimization method is researched in kinds of working conditions, elevations and beams. In order to reduce the design variables and improve the calculation efficency, mathematical calculation and the finite element method ware combined to calculate the dangerous working condition for boom structure optimization. In order to ensure optimal results, the constraint and the optimal algorithm ware taken account during the calculation. Aiming at the rigidity matching problem of the chord member and web member, this paper used finite elememt method to analyze the K-type structure of boom structure, and researched the influences of the changes of web member sizes on the stress and deflection of K-type structure, and then studied the relationship of chord member and web member.APDL is used to build the parameter parametric model of tower crane truss boom, and then to optimite the boom structure, the optimal result meted the requirements. The optimization method meted crane truss boom optimization design requirements on complex working condition, and was easy to quickly master by the project. The APDL program had Good modifiability and could be as the original script. Through the research on the influences of the changes of web member sizes on the stress and deflection of K-type structure, the research result was important to study the rigidity matching problem of the chord member and web member and carrying capacity of the boom structure optimization, and provide a useful reference for designers chosing the sizes of the chords and web members.