Lightweight design of forklift frame based on guide weight method

Abstract

The integrated optimization method combining the guide weight method and the sensitivity calculation was used to lightweight design the gantry structure of a certain type of internal combustion forklift aiming at the large margin of large-scale mechanical design. The multi-state constraints such as strength and stiffness were derived. The single-objective and multi-sex constraint optimization model of the guide weight method was established. The Kuhn-Tucker multiplier was solved by Lamker algorithm. The semi-analytic method with classical error correction term (ESA) was used to calculate sensitivity, and the unit error correction term was introduced to eliminate the error caused by the rotational displacement of the rigid body. The problem that the bulk density and the guided weight are difficult to solve was solved combined with the guide weight method. The finite element method was used to check the strength and stiffness of the optimized gantry structure. Results show that the integrated optimization method combined with the guide weight method and the sensitivity calculation has a significant effect, which makes the quality of the forklift gantry reduced by 18.21%. The optimized gantry strength and stiffness meet the design requirements.