Expressions of velocities and accelerations in usual coordinates are simply derived by means of the composition formulae of velocity and acceleration in special rotation reference systems.
2
用数学方法证明牵连运动为转动时点的加速度合成定理。
The mathematical method is used to prove composition theorem of acceleration of a particle when the carrier motion is rotation.
Synthetic translational and rocking accelerograms have been generated using the data on local geology and soil in the bay area, and the recorded motions at selected stations.