通过改变机体表面局部刚度，对减小机体表面振动响应的几种方法进行了探讨。
Several methods to reduce block surface vibration response by changing the local stiffness of the block are discussed.
又通过发动机机体表面振动加速度，确定活塞敲击噪声产生的根源在于活塞与缸套的碰撞冲击。
It has also been clear that the source of piston knock noise is the impact between piston and cylinder sleeve by the vibration acceleration of the engine's body surface.
方案一采用介质微带缝隙天线的形式，简便起见，简化机体表面模型为一倾斜放置的超大金属平面。
Planar slot antenna is proposed firstly, simplifying the surface of the airplane to be a large mental plane which inclines against the ground plane.
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