According to the characteristic and the boundary conditions, the cavity roof is respectively simplified as two kinds of mechanical models (round model and ellipse model).
同时根据溶洞顶板的特征和边界条件，将其简化为椭圆形和圆形顶板两种力学模型。
2
By qualitative analysis, it has been proved that the motion of the Combustion zone boundary and the enlargement of the dimensions of the cavity with time would balance the acoustic energy growth.
定性的证明了燃烧区边界的运动和燃烧中空间随时间的扩大对声能的增长起抵销作用。
3
Based on the potential theory, an expanding contracting virtual boundary element method (ECVBEM) is presented to solve the vibration and sound radiation from a cavity with an arbitrary shape.