According to the operating mode of the rod string in slant straight Wells, the authors establish a one-dimensional dampedwaveequation for the rod string.
根据斜直井抽油杆柱工况特点，建立了斜直井抽油杆柱的一维有阻尼波动方程。
2
Studying the equation of motion of damped simple pendulum, the shock wave solution is found.
研究和分析有阻尼单摆的运动方程，应用近似法方程时发现存在冲击波解并精确求解。
3
Pseudospectral method is used to solve the driven -damped 1-d nonlinear drift -waveequation. Some problems in the computation are discussed.