Multiobjective integrated optimization of structural topology and control for piezoelectric smart trusses with interval parameters based on possibility degree
Multiobjective integrated optimization of piezoelectric smart truss with interval parameters is investigated.The mass density, elastic modulus and cross-sectional areas of common metallic connected bars and piezoelectric stack, allowable stress of common truss elements and maximum voltage of piezoelectric actuator stack are regarded as interval parameters.Based on the quadratic optimal control in the coupling modal space and interval possibility degree, the integrated optimization model with stress and voltage constraints of piezoelectric smart truss is constructed, where the upper bounds of structure weight and quadratic index are taken as objective functions and cross sectional areas of bars, nodal topological design variable, positions and number of actuator and control gain are regarded as independent design variables.Through Taylor expansion and interval extension of function, the interval values of the objective functions and the constraint functions can be obtained.Individual validity examination, structural stability examination, controllability examination are introduced to Pareto CMOPGA(constrained multi-objective optimization genetic algorithm) on the basis of individual ranking to solve the constraint multiobjective optimization problem.A example show that the proposed method is effective and reasonable.
piezoelectric smart truss possibility degree integrated topology optimization multiobjective optimization genetic algorithm
Xu Bin Jin Yujia
Institute of vibration engineering,School of Mechanics,Civil Engineering & Architecture,Northwestern Department of Engineering Mechanics,Chang’an University,xi’an 710064
国际会议
黄山
英文
1-10
2012-06-18（万方平台首次上网日期，不代表论文的发表时间）