Abstract
The problem of designing a structure with multiple frequency constraints by using an optimality criterion method was investigated. The frequency constraints include the condition that the frequencies are equal or separated by a specified interval with a preselected vibration mode associated with the fundamental frequency. Three different scaling procedures are discussed to make the fundamental or any other frequency equal to the desired value. A 38 member truss structure with different constraint conditions and two distributions of nonstructural masses was optimized.
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