论文标题
球形对称散射器的精确散射溶液的概括和稳定
Generalization and stabilization of exact scattering solutions for spherical symmetric scatterers
论文作者
论文摘要
在先前的工作中，作者描述了一种快速的高保真计算机模型，用于来自多层弹性球的声学散射。现在，通过缩放策略扩展了这项工作，可以显着减轻溢出问题，从而扩大模型的有用频率范围。此外，实施了新的边界条件和负载。最重要的是流体流体和固体固体耦合，这些耦合允许散射对象的完全综合分层。固体和流体分别实现了声音硬和柔软的边界条件。除了现有的声音激发外，还实施了点兴奋和表面激发形式的机械激发。还包括以滞后阻尼以及粘性液层形式的衰减。包括几个数值示例，目的是针对现有参考解决方案验证代码。示例包括气泡，涂层钢壳和点式钢壳。
In a previous work the authors described a fast high-fidelity computer model for acoustic scattering from multi-layered elastic spheres. This work is now extended with a scaling strategy significantly mitigating the problem of overflow and thus expanding the useful frequency range of the model. Moreover, new boundary conditions and loads are implemented. Most important are the fluid-fluid and solid-solid couplings, which allow a completely general layering of the scattering object. Sound hard and sound soft boundary conditions are implemented for solids and fluids respectively. In addition to the existing acoustic excitation, mechanical excitation in the form of point-excitation and surface excitation are implemented. Attenuation in the form of hysteresis damping as well as viscous fluid layers are also included. Several numerical examples are included, with the purpose of validating the code against existing reference solutions. The examples include air bubbles, a coated steel shell and a point-exited steel shell.
