Lightweight Design For The Trolley Frame Of ND32/5t Crane

With the automation level of the machinery industry is gradually increased, the application of handling equipments is also increasing. As one of the most commonly used handling equipments, cranes play an important role in the industrial production, including machinery processing, electrical equipment, chemical industry, aviation industry, national defense construction and so on. As a kind of common crane, bridge crane has the characteristics of low height, light weight, reasonable load and high modularization and is widely used in plant production.The metal structure of bridge crane mainly consists of bridge and trolley frame. The bridge includes two end beams, a main beam, a platform, guardrails and an operating room. The trolley has the function of lifting and unloading the goods, and it is the important load bearing structure of the crane. Therefore, the design of a reasonable trolley frame structure is of great significance for the safety, usability, and cost-effectiveness of the crane.In this paper, the crane trolley frame is the research object. Study its structure, establish the parameterized model by ANSYS APDL and then simplify it correspondingly. According to the characteristics of the trolley frame structure, generate the finite element mesh. The assembly relation of the trolley frame is defined by the MPC algorithm, and the solid model of the trolley frame is simulated as accurately as possible. Set up the parameterized model, and describe the geometric model, material properties, finite element mesh, load, stress, deformation, the volume of trolley frame with parameters, which reflect the mechanical model features of the trolley frame.Then, calculate the load combination of the crane trolley frame and study mechanical analysis in two working modes and four operating modes. Compare the finite element calculation results of different load combinations, and analysis optimization design space.Finally, analysis the sensitivity of the volume of the crane trolley frame to main plate thickness and filter design variables. Satisfying strength and stiffness requirements is the constraint condition, and the minimum volume is the objective function. Take size optimal design through the Sub-Problem method and the DV Sweeps method provided by ANSYS, find the optimal design scheme. Study mechanical analysis of the optimal design scheme by ANSYS in the most adverse operating mode and verify the feasibility of the optimal design scheme.