mass if m = 0.5 kg at a distance of e = 0.15m from the axis of rotation, as shown in Fig.3.55.
The tail section has a length of 4 m, a mass of 240 kg, a flexural stiffness (EI) of 2.5 MN-m2, and a damping ratio of 0.15. The mass of the tail rotor blade, including their drive system, is 20 kg.
Determine the forced response of the tail section then the blades rotate at 1500 rpm.
탈수통의 기울임각과 stiffness
탈수기의 진동을 다루기 위해 탈수통을 바닥에 damper와 spring으로 고정되어 있다고 가정하였다. damper는 회전축과 동일선상에 위치해있고, spring은 탈수기의 중심에서 만큼 떨어진 곳에 위치해있다. 이 때 탈수기의 불평형 질량에 의해 탈수기 전체가 중심축을 기준으로
represents a rotating leader and a core group, making
everyone a leader. Every member will be eager to make opinions,
and are more likely to find better, creative solutions than Kraft food.
§ Also Kraft food may seek for outside advisers like the colleague in
Orpheus group. Creative external advises can be a good guideline
for such a stiff organization like Kraft Food.
1. Chain Microstructure
Stiffness: Chin flexibility, 분자 사이의 거리, Side chain의 flexibility 등의 영향
Chain Flexibility
single chain에서의 rotation이 결정한다. 입체장애로 인하여 Chain flexibility가 낮아지면 Tg는 증가한다.
Flexible side group
Side group에 의하여 분자간의 거리가 증가할 경우 free volume이 증가하고
stiff and
grotesque.
MORAN lurches back in shock as the raveling net LIFTS from
the waters surface...
...the face of Carl Heine. Turned to the sun.
Moran reels away as his young deputy, ABEL MARTINSON, turns
to throw up over the gunnel behind him.
CUT TO:
INT. CORONERS LAB - DAY
The face of HORACE WHALEY, coroner, gazing down. A shading
of regret behind the professional mask. Carls face is
reflec