div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentbd3-12-a-the-second-moment-of-an-area-e-denotes-the-internal-damping-coefficienthtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: bd3 12 — the second moment of an area E* denotes the internal damping coefficient of aluminum and c is the external damping coefficient of air The value P = F + F + F + loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader030fdocumentsnetreader030viewer20220403035e8d2c52c84a2145970abd86html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentbd3-12-a-the-second-moment-of-an-area-e-denotes-the-internal-damping-coefficienthtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: bd3 12 — the second moment of an area E* denotes the internal damping coefficient of aluminum and c is the external damping coefficient of air The value P = F + F + F + loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader030fdocumentsnetreader030viewer20220403035e8d2c52c84a2145970abd86html5thumbnails2jpg width=140 height=200 divdiv