研制了一种新型直线超声波电动机，电机采用面内振动的形式。
The motor based on the vibration in plane of the rectangular plate.
建立了用来检测微机电系统谐振器面内运动的激光差动多普勒系统，测量了谐振器的振动速度。
A differential laser Doppler system is built to measure the in-plane movement of micro-electro-mechanical systems (MEMS), and the vibration of a MEMS resonator has been measured.
对圆弧拱面内自由振动的频率和非线性内共振现象进行了研究。
The in-plane free vibration frequencies and nonlinear internal resonance of circular arches were studied.
对一类轴对称圆环的面内弯曲振动进行了分析计算，给出了圆环面内弯曲振动固有频率表达式。
The flexural vibration of a circular ring that is of axis symmetry is analyzed and calculated, the solid frequency expression of the flexural vibration is obtained.
利用地面和车载测试系统，对列车车体表面、车厢内部、隧道壁面空气压力变化、隧道内列车风、隧道口微气压波和隧道壁面振动加速度等参数进行测试。
Using the ground and vehicular test systems, many parameters such as pressure change, wind caused by train, micro-pressure wave and vibration acceleration of the wall of tunnel were tested.
当体积源向壁面传播与边界层作用，会在边界层内产生局部振动。
The sources interacte with the boundary and produce local disturbance in the boundary.
利用面内弯曲振动法测得的动态杨氏模量值小于面外弯曲振动法测得的结果。
The dynamic Young's moduli measured by in-plane flexural vibration test were less than those measured by out-plane flexural vibration test.
利用面内弯曲振动法测得的动态杨氏模量值小于面外弯曲振动法测得的结果。
The dynamic Young's moduli measured by in-plane flexural vibration test were less than those measured by out-plane flexural vibration test.
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