对软梁-硬半空间系统，梁的剪切波速和压缩波速也是临界速度；

For soft beam-stiff half space system, wave speeds in beams are also critical velocities.

youdao

对软梁-硬半空间系统，梁的剪切波速和压缩波速也是临界速度；

For soft beam-stiff half space system, wave speeds in beams are also critical velocities.

youdao