本专著面向深海科技发展急需、重大专项和技术领先方向，紧密围绕深海耐压壳装备设计理论与应用技术这个核心主题，针对现有球形结构存在缺陷敏感性高、水动力学特性差、壳内空间利用率低等问题，提出一种新型结构—蛋形耐压壳替代球形耐压壳，从生物学、应用力学、海洋工程学和仿生学角度，全面阐述了深海蛋形耐压壳、蛋形仿生封头、多蛋交接耐压壳研究的*成果。专著内容系统完整，理论创新性明显，技术实用性强，可以直接指导生产实践。专著的出版对全面提升我国深海工程装备自主研发能力具有重要实践意义，也为中国深海耐压装备产业创新发展提供参考和支撑。

Chapter 1Introduction1 1.1Background and significance1 1.2Overview of research status4 1.2.1Externally pressurized spherical shells4 1.2.2Externally pressurized untypical shells5 1.2.3Externally pressurized domed heads5 1.2.4Shell buckling research approaches6 1.2.5Externally pressurized multisegment shells7 1.3Problems and solution8 1.4Structure of the monograph10 References12 Chapter 2Buckling of deep sea spherical pressure hulls18 2.1Buckling analysis of geometrically perfect and imperfect hulls19 2.1.1Geometry and material19 2.1.2Buckling of geometrically perfect hulls20 2.1.3Buckling of geometrically imperfect hulls23 2.2Effect of yield strength on the buckling of hulls26 2.2.1Perfect geometry analysis27 2.2.2Imperfect geometry analysis28 2.3Experimental methodology of spherical shells34 2.3.1Shell manufacturing and testing34 2.3.2Material properties38 2.4Buckling analysis of spherical shells39 2.4.1Experimental and analytical results 40 2.4.2Comparison between experimental and numerical results42 2.4.3Effect of constitutive models45 2.4.4Effect of geometrical imperfections46 2.5Summary49 References51 Chapter 3Bionic design of eggshape pressure hulls54 3.1Geometric properties of goose eggshells55 3.1.1Size of goose eggshells56 3.1.2Surface area and volume of goose eggshells58 3.1.3Symmetry of goose eggshells59 3.1.4Shape function of goose eggshells61 3.1.5Thickness of goose eggshells62 3.2Load carrying capacities of goose eggshells63 3.2.1Experimental results of goose eggshells67 3.2.2Numerical results of goose eggshells71 3.2.3Comparison between experimental and numerical data73 3.3Configuration and size eggshaped pressure hulls75 3.4Strength, stability, and buoyancy of eggshaped pressure hull77 3.4.1Strength and stability of eggshaped pressure hull77 3.4.2Uniform wall thickness analysis of eggshaped pressure hulls78 3.4.3Nonuniform wall thickness analysis of eggshaped pressure hulls80 3.4.4Spherical pressure hulls analysis81 3.**nalytical results of eggshaped and spherical pressure hulls82 3.6Numerical results of eggshaped and spherical pressure hulls85 3.7Evaluation and comparison of main properties for pressure hulls92 3.8Summary93 References95Chapter 4Effect of geometrical parameters on buckling of eggshaped pressure hulls97 4.1Effect of shape index on buckling of eggshaped pressure hulls98 4.1.1Geometry of eggshaped pressure hulls98 4.1.2Capacity and mass of eggshaped pressure hull100 4.1.3Numerical modeling of eggshaped pressure hulls101 4.1.4Linear buckling of eggshaped pressure hulls102 4.1.5Nonlinear buckling of eggshaped pressure hulls104 4.2Effect of wall thickness on buckling of eggshaped pressure hulls107 4.2.1Buckling of geometrically perfect eggshaped pressure hulls107 4.2.2Buckling of geometrically imperfect eggshaped pressure hulls111 4.2.3Comparison between eggshaped and spherical pressure hulls113 4.3Buckling experimentation using CNCmachined eggshaped shells116 4.3.1Experimental buckling of CNCmachined eggshaped shells116 4.3.2Numerical buckling of CNCmachined eggshaped shells120 4.4Buckling experimentation using rapid prototyping eggshaped shells 124 4.4.1Experimental buckling of rapid prototyping eggshaped shells124 4.4.2Numerical buckling of rapid prototyping eggshaped shells130 4.4.3Effects of imperfection shape and size on buckling of eggshaped shells133 4.5Summary134 References136 Chapter 5Enhancement of eggshaped pressure hulls using nonuniform wall thickness139 5.1Design and fabrication of eggshaped pressure hulls140 5.1.1Geometrical design140 5.1.2Sample fabrication141 5.2Measurement and test142 5.2.1Shape scanning of samples142 5.2.2Hydrostatic test of samples144 5.2.3Tensile tests of material147 5.3Experimental analysis of eggshaped pressure hulls148 5.4Numerical analysis of eggshaped pressure hulls150 5.5Summary153 References154 Chapter 6Collapse modes and ultimate strengths of eggshaped shells with corrosion thinning157 6.1Problem definition158 6.2Numerical analysis of eggshaped shells with corrosion thinning160 6.2.1Collapse mechanism analysis162 6.2.2Ultimate strength analysis163 6.3Experimental analysis of eggshaped shells with corrosion thinning165 6.3.1Fabrication and measurement of samples166 6.3.2Externally hydrostatic test of samples169 6.3.3Numerical analysis of fabricated eggshaped shells172 6.4Summary174 References175 Chapter 7Buckling of prolate eggshaped domes under external pressure179 7.1Geometrical and physical properties of eggshaped domes180 7.1.1Geometry of eggshaped domes180 7.1.2Capacity and mass of eggshaped domes182 7.2Manufacture, measurement and test of eggshaped domes183 7.2.1Overview of the manufacturing process183 7.2.2Pretest measurements183 7.2.3Collapse tests185 7.2.4Parent material properties186 7.3Experimental analysis of experimental eggshaped domes187 7.4Numerical analysis and verification of manufactured eggshaped domes187 7.5Buckling of a perfect eggshaped dome190 7.6Summary194 References195 Chapter 8Buckling of multisegment eggshaped pressure hulls197 8.1Geometry of the multisegment eggshaped pressure hull198 8.2Design of rib rings199 8.2.1Analytical prebuckling analysis of the eggshaped pressure hull200 8.2.2Inner radii of rib rings201 8.3Numerical result and discussions202 8.3.1Prebuckling state203 8.3.2Buckling state205 8.3.3Postbuckling state207 8.3.4Verification of numerical approach211 8.4Summary214 References215