| 1. | Piezoelectric elements were pasted on / under the cantilever beam where stress was the maximum or sub - maximum as actuators to control the vibration of the cantilever beam
在悬臂梁振动时应力最大或次最大处的上、下表面同位元配置压电片，作为抑制悬臂梁振动的致动器。 |
| 2. | Negative mode velocity feedback was adopted and the control voltage applied to each piezoelectric element acting as actuator was calculated to control the vibration of the beam
采用模态速度负反馈进行回馈控制，以此计算出各个作为致动器的压电片的控制电压，以抑制悬臂梁的振动。 |
| 3. | The influence of the bonding layer thickness and material properties , piezoelectric layer thickness , placements and feed - back control parameters on the vibration suppression are investigated
分析了粘弹层、压电层厚度和压电片位置等结构参数变化以及材料参数变化对控制效果及结构频率的影响。 |
| 4. | Numerical simulations were performed and results show that significant attenuation of radiated acoustic power can be obtained , and sound radiation cancellation performance becomes better in low and medium frequencies
进行了数值仿真，仿真结果表明，应用压电片能有效地抑制声呐设备中障板声辐射，抑制中低频的声辐射效果更好。 |
| 5. | Simulation results show that the vibration of the beam can be suppressed rapidly by applying voltage to the piezoelectric patches displaced in this way , and single mode vibration and multi - mode vibration can be controlled simultaneously
通过算例进行数值仿真，结果表明，以此方法布置压电片和输人控制电压，能迅速抑制悬臂梁的振动，可单独或同时控制几阶模态振动。 |
| 6. | The actuating and sensing abilities for the embedded piezoceramics are discussed in details . consequently , the actuating equations , when piezoceramics work as actuators , and sensing equations , when piezoceramics work as sensors , are derived
对其作动能力和传感能力进行了详细的推导，得到了埋入复合材料梁和板结构中压电片的压电作动弯矩方程和压电传感方程。 |
| 7. | First , the finite element dynamic models of the cantilever intact and damaged laminated composite cylindrical shells are established . the piezoelectric smart materials bonded on the laminated composite shell are used as both actuator and sensor
首先，建立表面粘贴有压电片材料的悬臂完好复合材料层合壳体及损伤复合材料层合壳体的有限元动力学模型，并求出其动力响应。 |
| 8. | Piezoelectric elements were bonded on the plate as actuators and the input voltage of each actuator was determined by the velocity of its position and volume velocity of the plate was made zero , through which the sound radiation from the plate could be controlled
在简支薄板表面粘贴压电片作为致动器，根据所处位置的速度确定输入控制电压，并使平板的体积速度为零，从而达到控制声辐射的目的。 |
| 9. | The main research works done and conclusions extracted are listed as follows . ( 1 ) . based on the piezoelectric equation , the strain and stress distribution are analyzed for the composite material structures with piezoelectric materials embedded inside
从压电材料的压电方程出发，针对埋入式压电片，分析埋入式压电片在和结构一起发生变形时基体结构材料和压电材料的应力应变的分布规律和关系。 |
| 10. | After analyzing the sense principles and calculation expression for piezoelectricity , we compose a sense network , compare the difference between the voltage amplifier and charge amplifier , give out the electric circuit of piezoelectric sensor for measure system
在分析了压电片对动态应变的传感原理和计算表达式后，该系统采用压电传感器组建了一个传感器网络。并且对比了电压放大器和电荷放大器的差异。 |
