A Tolerance Allocation Optimization Method of Multifunctional Integrated Composite Exterior Wall Panel Driuen by Comprehensive Cost Coefficient

Aiming at the complex problems of tolerance allocation in the manufacture， embedded parts of the main structure of multifunctional integrated composite exterior wall panel， combined with the improved genetic algorithm， a tolerance allocation optimization method driven by comprehensive cost coefficient was proposed. A two-dimensional chain analysis model including longitudinal joints， transverse joints， and diagonal lines between wallboards was established based on the synergistic effect of various tolerances in the horizontal and vertical directions. An optimization function was constructed to minimize the sum of comprehensive cost coefficients， and the constraints of tolerance and dimensional chain models were determined. Different tolerance levels were encoded as chromosomes， and the initial population was randomly generated. The selection， crossover and mutation operations were carried out by calculating the fitness of each individual （the reciprocal of the optimization function）， and the elitism principle was introduced. Finally， the optimal tolerance allocation scheme satisfying the constraint conditions was obtained iteratively. Through the comparison and analysis of specific examples， the allocation scheme determined by this method can reduce the comprehensive cost coefficient by 11.25% ，compared with the traditional genetic algorithm method， and provide theoretical support for the tolerance allocation of multifunctional integrated composite exterior wall panels.