申論題

2. A cantilever beam of length 2L is loaded by a uniformly distributed load as shown below and supported at the mid-point of the beam B by a linearly elastic rotational spring with stiffness k_Ｒ = 2EI/L. The relationship between the moment provides by the spring (M_Ｂ) and the rotational angle at B (θ_B) is M_B =k_Ｒθ_B. (25%)

2) Compute the rotational angle of the beam at point B.