Free Vibration Analysis of Rotating Pretwisted Functionally Graded Sandwich Blades

<div>Nondimensional frequency parameters for the first six modes of the FG sandwich blade with varying nondimensional rotation velocities (<span class="nowrap"><svg height="12.7569pt" id="M294" style="vertical-align:-0.2063999pt" version="1.1" viewbox="-0.0498162 -12.5505 24.7964 12.7569" width="24.7964pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><rect height="0.65243" width="3.51009" x="0" y="-11.8482"></rect><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M238 681C243 705 239 712 230 712C217 712 156 682 75 674L70 648H105C148 648 153 641 144 598L39 110C18 11 35 -12 55 -12C90 -12 166 36 221 103L205 125C174 93 130 65 118 65C112 65 108 68 114 96L238 681Z" id="g113-109"></path></g><g transform="matrix(.013,0,0,-0.013,7.142,0)"><path d="M535 323V373H52V323H535ZM535 138V188H52V138H535Z" id="g117-34"></path></g><g transform="matrix(.013,0,0,-0.013,18.405,0)"><path d="M285 378C315 398 338 416 353 432C373 451 384 474 384 503C384 579 325 635 236 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International Journal of Aerospace Engineering

tab11

Table 11

Table 11: Free Vibration Analysis of Rotating Pretwisted Functionally Graded Sandwich Blades 