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arXiv 2610.14741math.AP
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三维中拉梅参数的唯一确定

Unique Determination of the Lamé Parameters in Three Dimensions

Jilin University(吉林大学);Bukhara State University(布哈拉国立大学)

Huaian Diao, Umidjon Durdiev

AI总结:

该研究在三维有界光滑凸区域中,利用弹性力学狄利克雷-纽曼映射,通过复几何光学解与输运刚性,唯一确定静态各向同性弹性体的两个拉梅参数,未施加额外限制性假设。

摘要:

我们证明,在\boldsymbol{\text{R}}^3的有界光滑区域内,当满足强凸性条件时,静态各向同性弹性力学的全狄利克雷-纽曼映射可唯一确定所有光滑拉梅参数。该证明采用精确的四分量拉普拉斯型约化,但其关键恒等式源自物理弹性解。约化系统的特征商秩为3,而主导物理伴随提升仅提供两个方向。我们从该提升核中约化振幅的首个非零修正项构造缺失的极化,结合固定的原始与伴随商标架,所得复几何光学解通过物理贝蒂恒等式生成完整的全纯加权3×3矩阵矩量族。柯西-普莱姆利分解将这些矩量转换为在公共外部归一化的可逆相对输运。对投影零方向的全纯依赖性及输运刚性,进而确定材料比与剪切模量,即两个拉梅参数。本研究未施加小性、对称性、可分性或解析性假设。

英文摘要:

We prove that the full Dirichlet-to-Neumann map for static isotropic elasticity uniquely determines both smooth Lamé parameters in a bounded smooth domain of \(\mathbb R^3\) under strong convexity. The proof uses an exact four-component Laplace-type reduction, but its decisive identities are obtained from physical elastic solutions. The characteristic quotient of the reduced system has rank three, whereas the leading physical adjoint lift supplies only two directions. We construct the missing polarization from the first nonvanishing correction of a reduced amplitude in the kernel of that lift. Paired with fixed primal and adjoint quotient frames, the resulting complex geometrical optics solutions yield a complete family of holomorphically weighted \(3\times3\) matrix moments through the physical Betti identity. Cauchy--Plemelj factorization converts these moments into an invertible relative transport normalized in the common exterior. Holomorphic dependence on the projective null direction and transport rigidity then determine a material ratio and the shear modulus, hence both Lamé parameters. No smallness, symmetry, separability, or analyticity hypothesis is imposed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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