Applying classical wave theory, a concept of equivalent elastic modulus on propagation speed modification of guided wave through "variable cross-section" of metal bar embeded layer was put forward.
运用波动的经典理论，提出了导波在金属杆嵌入层“变截面”传播时波速改变的“等效弹性模量”的概念。
Based on the stress wave theory, stress wave model of lead screw cold roll-beating is built, stress wave transfer rule is obtained and the speed of stress wave is calculated.
以应力波理论为基础，建立了丝杠冷滚打的应力波模型，获得了滚打过程中应力波的传播规律及传播速度。
In addition, with the appearance of large-capacity and high-speed computer, it is feasible that time domain theory is applied for numerical simulation of ship motions and wave loads.
另外，随着大容量和高速度计算机的出现，对于时域耐波性理论研究有了数值计算实现的条件。
According to the theory of wave crack, the variation rules of wave speed and amplitude, by use of the compressional-wave probe, the polarizing wave speed of rock with large plane is obtained.
根据横观各向同性介质波动理论，结合波速、波幅的变化规律分析，通过纵波探头平测法，测试了有较大平面的岩块横波在层理面内的偏振波速。
According to the theory of wave crack, the variation rules of wave speed and amplitude, by use of the compressional-wave probe, the polarizing wave speed of rock with large plane is obtained.
根据横观各向同性介质波动理论，结合波速、波幅的变化规律分析，通过纵波探头平测法，测试了有较大平面的岩块横波在层理面内的偏振波速。
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