This paper is concerned with the optimum design and sensitivityanalysis methods of piezo- electric intelligent trusses on thestructural stiffness and free-vibration frequency. On the basis ofthe finite el- ement emtho...This paper is concerned with the optimum design and sensitivityanalysis methods of piezo- electric intelligent trusses on thestructural stiffness and free-vibration frequency. On the basis ofthe finite el- ement emthod and taking into account themechanical-electric coupling effect under electric load and me-chanical load, the computational formula of sensitivities ofstructural displacement and free -vibration frequen- cy with respectto the size and shape design variables are proposed.展开更多
A continuous variable optimization method and a topological optimization method are proposed for the vibration control of piezoelectric truss structures by means of the optimal placements of active bars. In this optim...A continuous variable optimization method and a topological optimization method are proposed for the vibration control of piezoelectric truss structures by means of the optimal placements of active bars. In this optimization model, a zero-one discrete variable is defined in order to solve the optimal placement of piezoelectric active bars. At the same time, the feedback gains are also optimized as continuous design variables. A two-phase procedure is proposed to solve the optimization problem. The sequential linear programming algorithm is used to solve optimization problem and the sensitivity analysis is carried out for objective and constraint functions to make linear approximations. On the basis of the Newmark time integration of structural transient dynamic responses, a new sensitivity analysis method is developed in this paper for the vibration control problem of piezoelectric truss structures with respect to various kinds of design variables. Numerical examples are given in the paper to demonstrate the effectiveness of the methods.展开更多
基金the Special Funds for National Key Basic Research of China (No.G1999032805)the Foundation for University Key Teachers by the Ministry of Education of China
文摘This paper is concerned with the optimum design and sensitivityanalysis methods of piezo- electric intelligent trusses on thestructural stiffness and free-vibration frequency. On the basis ofthe finite el- ement emthod and taking into account themechanical-electric coupling effect under electric load and me-chanical load, the computational formula of sensitivities ofstructural displacement and free -vibration frequen- cy with respectto the size and shape design variables are proposed.
基金the National Natural Science Foundation of China (10772038,10302006 and 10421202)
文摘A continuous variable optimization method and a topological optimization method are proposed for the vibration control of piezoelectric truss structures by means of the optimal placements of active bars. In this optimization model, a zero-one discrete variable is defined in order to solve the optimal placement of piezoelectric active bars. At the same time, the feedback gains are also optimized as continuous design variables. A two-phase procedure is proposed to solve the optimization problem. The sequential linear programming algorithm is used to solve optimization problem and the sensitivity analysis is carried out for objective and constraint functions to make linear approximations. On the basis of the Newmark time integration of structural transient dynamic responses, a new sensitivity analysis method is developed in this paper for the vibration control problem of piezoelectric truss structures with respect to various kinds of design variables. Numerical examples are given in the paper to demonstrate the effectiveness of the methods.
