皮筋的抖动
Oscillation of the Elastic Medium
SGT 对引力波的解释：波不是源「发射」的信号，而是源剧烈加速时介质来不及同步恢复，应变梯度脱离源区、以本征波速向外传播的弹性波逃逸。
SGT’s picture of gravitational waves: not a signal “emitted” by the source, but elastic strain escaping at the medium’s intrinsic speed when the source accelerates too fast for the medium to keep pace.
类比说明：本演示用二维弹性介质类比空能响应，不是真实引力波观测或 SGT 场方程数值解。演示频率与波速均为教学缩放；真实介质本征波速 ≈ c，辐射临界频段远高于皮筋尺度。
Analogy note: this demo uses a 2D elastic medium as a stand-in for Kong-Neng — not real gravitational-wave data or a numerical SGT solver. Frequencies and wave speeds are pedagogically scaled; the real medium responds at ≈ c, with critical radiative bands far above rubber-band scales.
源在缓慢移动，介质有充足时间同步响应——这是静态引力场的更新。
The source moves slowly; the medium has time to respond in sync — a quasi-static update of the gravitational field.
SGT 引力波图像：缓慢运动 → 介质同步跟随（静场）；剧烈抖动 → 近源形变来不及恢复，波包以恒定本征波速脱离源区传播。波一旦逃逸，不再受源当前运动支配。
皮筋/介质类比 · 非真实引力波 · 频率为教学缩放。
SGT gravitational-wave picture: slow motion → medium follows in sync (static field); violent shaking → near-source strain cannot recover in time, wave packets detach and propagate at constant intrinsic speed. Once escaped, the wave is no longer tied to the source’s instantaneous motion.
Elastic-medium analogy · not real GWs · frequencies pedagogically scaled.