Flow-induced loads and Strouhal frequencies of secondary hyperboloid reflector which is located at top of the central tower of a proposed solar power plant are investigated. Initially for validation, flow-induced vibration characteristics of 3-D rectangular cylinder are studied and found in good agreement with previously published results. After the validation of the present numerical procedure, the force coefficients and the Strouhal frequencies of solar secondary hyperboloid reflector are determined for operational and survival wind speeds. Influences of various numerical parameters are investigated through the statistical values of the drag and the lift coefficients, Strouhal number, and pressure distribution. Finite element analysis has also been done to find out the deflections and stresses due to dead weight, imposed loads and wind loads and to optimize the design of hyperboloid and towers.