Dynamic response and lightweight design of winding drum based on CAE technology

Abstract

To enhance the rationality of the anchor winch drum structure design and reduce costs and energy consumption, a lightweight design scheme was put forward based on multi-objective optimization technology. According to the working principle, load characteristics, and composition of the anchor winch, a parameterized coupled model of modal and strength was established using the finite element method, from which the stress, deformation, natural frequency, and mode shapes characteristics of the drum part were obtained. Under the premise of not changing the assembly dimensions and not causing structural interference, the dimensions of the cylinder, side panels, and ribs were determined as design variables, and corresponding sensitivity analysis was derived. The maximum stress, first-order equivalent stiffness, and mass were set as the optimization targets, and the Kriging model was used as an approximating function in the construction of mathematical model. The standard criteria for evaluating the precision of the response surface model were chosen as the coefficient of determination, adjusted coefficient of determination, and root mean square error. Under the condition of maintaining equivalent stiffness without degradation, two lightweight design schemes were obtained under the conditions of no less than the initial stress peak value and 1.5 times the stress peak value. The results show that it is possible to achieve a weight reduction rate of 14.1 % without increasing the stress peak value and without reducing the equivalent stiffness, effectively achieving the design goal of energy saving and cost reduction