【简答题】An instrument to
measure the acceleration of gravity on Mars is constructed of a spring
from which is suspended a mass of 0.24(kg). At a place on earth where the
local acceleration of gravity is 9....
【简答题】图示两悬臂梁AB、CD的端面B、C处有空隙 。二梁长度为l,抗弯刚度分别为EI和2EI。1)若在P作用下AB梁B端挠度 ,求此时二梁中的最大弯矩(图(a));2)若将B、C端强行安装在一起后卸去外加载荷,求此二梁中的最大载荷(图(b))。 关键提示 :1)此为一次静不定问题;2)图(a)梁的变形条件为w B -w C =δ,要注意引起w B 和w C 的力;图(b)梁的变形条件为w B +w C ...
【简答题】An instrument to measure the acceleration of gravity on Mars is constructed of a spring from which is suspended a mass of 0.24(kg). At a place on earth where the local acceleration of gravity is 9.80(...