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Dynamic Chladni resonance transitions across multi-modal acoustic plate modes. Acoustic radiation pressure ejects deterministic granular sediment from vibration antinodes, accumulating dense sand ridges along morphing nodal zero-lines.
Under the seventh terrace, the bedrock vibrates at a sustained modal harmonic. The ash here is not soil—it is dry granular silica ejected outward by standing waves until it settles into quiet ridges. 振动把细粉推离腹点，只在静止的零线上堆叠出白色的骨架。
Continuous interpolation across modal indices $(m_1, n_1) o (m_2, n_2)$ under square plate boundary conditions. Particle drift follows acoustic radiation force $\mathbf{F} \propto - abla \langle p^2 angle$. Mode bifurcation transitions smoothly without teleporting mass; granular velocity damping near $\psi \approx 0$ preserves sharp ridge contrast (74% baseline dot field, dense glyphs condensed along zero-crossings). 节线裂变时没有发生相空间撕裂，颗粒像潮汐退去一样在新的干涉谷底重新结晶。