Structure reconstruction of anchor winch drum based on parameterized surrogate model with lightweight design

To improve the operational stability of the anchor winch, parametric reconstruction of the winch drum structure was conducted based on surrogate model technology. With the stress peak value and natural frequency as constraint conditions, lightweight design of the overall structure was implemented, effectively achieving energy conservation and consumption reduction. A parametric model coupling strength and modal characteristics of the winch drum was established using the finite element method. Taking the stress peak value, first-order natural frequency, and mass as objective functions, a response surface was fitted according to the mapping relationship with discretized parameter dimensions, and error verification was conducted. An optimization mathematical model of the winch drum was constructed, and the sequential quadratic programming (SQP) algorithm was adopted to solve the extremum of the model under different constraint conditions. Research indicates that the proxy model exhibits high accuracy. Under conditions of 1 time and 1.5 times the peak stress, the weight of the anchor drum can be reduced by 17.4 % and 27.6 %, respectively, with the natural frequencies remaining no lower than the initial values. The research method can significantly improve the cost-effectiveness of mechanical design and achieve good energy-saving and consumption reducing effects.