关键词: statically indeterminate truss, adjusting bar-length, good working state, optimum design, optimum construction

Abstract: The minimum weight of sandwich construction which is regarded as objective function has been discussed Under given constraint condition of the strength or the stiffness, the four optimum parameters of sandwich construction with honeycomb core thickness of the face t_f. thickness of the honeycomb core h_c. thickness of the honeycomb wall t_s. side length of the honeycomb cell c, are evaluated. By using constraint condition of the strength, a equation of high degree is finally solved. In the constraint condition of the stiffness, the constraint optimization problem is treated as inconstraint optimization problem with the method of obtaining extreme value solution by undetermined parameter multiplication. Also, the results are discussed.

Key words: statically indeterminate truss, adjusting bar-length, good working state, optimum design, optimum construction