对利用人工地震增加采油量的机理作了探讨。研究了振动对含油层的影响，探讨了制约非均匀裂隙多孔介质中渗流的三个基本因素：含油层应力梯度、渗透率和动力粘滞系数，分析了超低频振动对三个基本因素的影响，以及可控震源工作时弹性波的传播特性，并对含油层在振动时的响应特性以及不同震源距的响应作了实验研究。

建立了在高频情况下一维构件的波传播模型，针对工程中常见的螺栓连接梁结构，讨论了波在其中传播的特性及能量耗散问题，提出了一种简化的非线性接头模型。分析与实验结果表明这种非线性模型更能接近实际。波通过梁的螺栓连接时，存在着能量耗散。螺栓松紧程度对能量耗散有较大的影响。在共振频率处，连接部分发生较大的折射。

This paper describes a new approach for non-destructive evaluation and the structural health monitoring with a high frequency impedance-based technique and wave propagation measurement. This new technique utilizes the direct and the converse electromechanical properties of piezoceramic (PZT) patches which are used as actuator-sensors to provided a low-power driven constant voltage dynamic excitation, and to record the modulated current flow through the structure. Elastic wave can be generated in structure by using PZT transducers. Therefore, it relies on tracking the electrical point impedance to identify incipient level damage. The wave may be used to obtain fundamental properties of the structural or to locate flaws. The advantage of this new approach compared with other NDE techniques are discussed. The most advantage of this technique over other NDE techniques is that it can perform continuous monitoring of the structure using non-intrusive small transducer that could be remotely interrogated in an automated mode. In addition, the experimental example is used to show the measurement method and the results.

A dynamic impedance-based structural health monitoring technique is introduced. According to the direct and the converse piezoelectric property of piezoelectric materials, the piezoceramic ( PZT ) can be used as an actuator and a sensor synchronously. If damage like cracks, holes, debonding, or loose connections are presented in the structure, the physical variations of the structure will cause the mechanical impedance modified. On the basis of introducing the principle and the theory, the experiment and the analysis on some damages of the structure are studied by means of the dynamic impedance technique. On the view of experiment, kinds of structural damages are evaluated by the information of dynamic impedance in order to validate the feasibility of the method.

建立了在高频情况下，一维构件的波传播模型，针对工程中常见的螺栓连接梁结构，讨论了波在这种情况中传播的特性及能量耗散问题，提出了一种简化的非线性接头模型。分析与实践结果表明这种非线性模型更能接近实际，波通过梁的螺栓接部时，存在着能量耗散。螺栓松紧程度对能量耗散有较大的影响。在共振频率处，连接部分发生较大的折射。