Abstract This is the 16th paper in the "Spacetime Substantivalism (Constitutive Spacetime Dynamics, CSSD) " series (Papers 0-16). The core of this research is founded on the empirical verdict of gravitational waves, which reveals that spacetime is not a vacuum void but a physical entity with extreme rigidity and internal homogeneity. By treating gravitational wave data as a direct probe of spacetime's constitutive properties, we have derived the "Substantive Lattice" model. This framework successfully provides a physical restoration of the light-speed postulate and the Lorentz transformation, reinterpreting them as dynamic responses to "Electromagnetic Load" within the lattice. In this work, we present a unified observational constraints analysis of the CSSD effective spacetime propagation framework. We parameterize deviations from general relativity (GR) through two leading-order effective coefficients: a cosmological propagation parameter (alpha₀) and a gravitational-wave dispersion parameter (beta). Using the GWTC-3 catalog and standard cosmological distance-redshift data, we perform a joint hierarchical Bayesian inference. Our results confirm that current datasets are fully compatible with the GR baseline, yielding a 95% bound of |beta| < 9e-23. This work establishes CSSD as a rigorous, falsifiable extension of GR, demonstrating that while spacetime exhibits constitutive cumulative effects on cosmological scales, it reproduces GR as an emergent infrared effective limit within current observational sensitivity. 本文是“实体时空论 (实体时空动力学, CSSD) ”系列研究的第16篇。本项研究的核心逻辑出发点是由引力波探测实验所证实的物理事实: 引力波的传播特性揭示了时空并非抽象的几何背景, 而是一个具有极高刚性、内部均匀性的物理实体。通过将引力波数据视为探测时空本构属性的直接探针, 我们推导出了“实体点阵”模型。该框架成功实现了对光速不变假设和洛伦茨变换的物理还原, 将其重新阐释为物质在点阵介质中运动时的“电磁负载”响应。 在本篇研究中, 我们提出了 CSSD 有效时空传播框架的统一观测约束分析。我们通过两个领先阶有效系数对偏离广义相对论 (GR) 的程度进行了参数化: 宇宙学传播参数 (alpha₀) 与引力波色散参数 (beta) 。利用 GWTC-3 目录及标准宇宙学距离-红移数据, 我们进行了联合分层贝叶斯推理。研究结果证实, 当前的观测数据与广义相对论完全兼容, 并给出了 beta < 9e-23 (95% 置信度) 的严苛约束。本项工作将 CSSD 确立为广义相对论的一个严谨、可证伪的扩展框架, 证明了尽管时空在宇宙学尺度上表现出本构累积效应, 但在当前观测灵敏度内, 它作为涌现的红外有效极限回归了广义相对论。
Hugang Cui (Wed,) studied this question.