宗智
计算力学，冲击与爆炸力学，船舶与海洋力学，生物力学
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 姓名：宗智
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学术头衔：
博士生导师
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学科领域：
公路运输管理
 研究兴趣：计算力学，冲击与爆炸力学，船舶与海洋力学，生物力学
宗智，1989年毕业于大连理工大学船舶系，1989－1992年在大连理工大学船舶系任助教、讲师，19921995年在日本广岛大学船舶与海洋工程系攻读博士学位，1995－1996年在新加坡国立大学土木系读博士后。曾先后兼任新加坡高性能计算研究院工程师、博士导师，大连理工大学船舶系教授、博士导师。长期从事计算力学，冲击与爆炸力学，船舶与海洋力学，生物力学的科研工作。先后获得国际离岸与基地工程协会 (ISOPE) 1994年最佳论文奖和水下冲击波技术1998年度新加坡国防科技奖。

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3551

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成果数
10
宗智， Z. Zonga， K.Y. Lama and Tessa Ganb
Shock and Vibration 7(2000)321332，0001，（）：
1年11月30日
Biodynamic response of shipboard crew to underwater shock is of a major concern to navies. An underwater shock can produce very high accelerations, resulting in severe human injuries aboard a battleship. Protection of human bodies from underwater shock is implemented by installing onboard isolators. In this paper, the optimal underwater shock isolation to protect human bodies is studied. A simple shockstructureisolatorhuman interaction model is first constructed. The model incorporates the effect of fluidstructure interaction, biodynamic response of human body, isolator influence. Based on this model, the optimum shock isolation is then formulated. The performance index and estriction are defined. Thirdly, GA (genetic algorithm) is employed to solve the formulated optimization problem. GA is a powerful evolutionary optimization scheme suitable for largescale and multivariable optimization problems that are otherwise hard to be solved by conventional methods. Abrief introduction to GA is given in the paper. Finally, the method is applied to an example problem and the limiting performance characteristic is obtained.
Biodynamic response,， underwater shock,， optimal isolation,， GA (， genetic algorithm)，

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【期刊论文】Bayesian estimation of complicated distributions
宗智， Z. Zong*， K.Y. Lam
Structural Safety 22(2000)8195，0001，（）：
1年11月30日
In a previous paper (Zong Z, Lam KY. Estimation of complicated disributions using Bspline functions. Structural safety 1998; 20(4): 32332), we used a linear combination of Bspline functions to approximate complicated distributions. The method works well for large samples. In this paper, we extend the method to small samples. We still use a linear combination of Bspline functions to approximate a complicated probability density function (p.d.f). Strongly in uenced by statistical uctuations, the combination coecients (unknown parameters) estimated from a small sample are highly irregular. Useful information is, however, still contained in these irregularities, and likelihood function is used to pool the information. We then introduce smoothness restriction, based on which the socalled smooth prior distribution is constructed. By combining the sample information (likelihood function) and the smoothness information (smooth prior distribution) in the Bayes' theorem, the in uence of statistical uctuations is effectively removed, and greatly improved estimation, which is close to the true distribution, can be obtained by maximizing the posterior probability. Moreover, an entropy analysis is employed to
Bayesian estimation， Complicated distribution， Small sample， Smooth prior， Entropy analysis

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【期刊论文】A variable order approach to improve differential quadrature accuracy in dynamic analysis
宗智， Z. Zong*
Journal of Sound and Vibration 266(2003)307323，0001，（）：
1年11月30日
Differential quadrature (DQ) is a numerical technique which can produce highly accurate results by using a considerably small number of grid points. When it is applied to dynamic equations, however, DQ may exhibit dynamic numerical instability. The present paper analyzed the sources of dynamic numerical instability through a simple example, and the main finding is that dynamic stability is dominated by the grid points near and on boundaries. Based on this, we propose a variable order approach which is characterized by applying different DQ schemes to the grid points near boundaries and grid points far away from boundaries. Numerical examples of both linear and nonlinear dynamic equations show that the variable order approach presented in this paper may greatly improve dynamic stability, producing convincing results.

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【期刊论文】ProbabilisticRisk Prediction of Submarine Pipelines Subjected to Underwater Explosion Shock
宗智
，0001，（）：
1年11月30日

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【期刊论文】Biodynamic response of shipboard sitting subject to ship shock motion
宗智， Z. Zong*， K.Y. Lam
Journal of Biomechanics 35(2002)3543，0001，（）：
1年11月30日
Underwater shock can produce very high accelerations, resulting in severe human injuries. In this paper, a shockstructurehuman interaction model is proposed to study the biodynamic response of a shipboard sitting subject to ship motion induced by underwater shock (ship shock motion) wherein, the human body is modeled using a lumped parameter system with the parameters obtained from dynamic tensile tests. The results obtained from the human model used in this paper and living human drop test are also compared. Numerical results have revealed the characteristics of human response to ship shock motion. The part in direct contact with the structure (like the pelvis) is much more vulnerable than other parts (like the head). The influences of structural damping and stiffness on the peak loads acting on the human body are investigated. Both damping and stiffness have important influences on the pelvis, but have much less influences on other parts. Injury criteria in the literature are also summarized to facilitate injury assessment.
Biodynamic response， Underwater shock， Sitting subject， Shockstructurehuman interaction， Injury criteria

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宗智， H. Gu*， Z. Zong， K.C. Hung
Finite Elements in Analysis and Design 40(2004)665687，0001，（）：
1年11月30日
For nonlinear problems, it is shown that the accuracy and stability of superconvergent patch recovery (SPR) method can be remarkably improved through the modi!cations introduced in this paper. These modi!cations are (1) use of integration points as sampling points, (2) weighted average procedure and (3) introduction of additional nodes. They are validated through numerical investigations of several large deformation problems. Based on the modi!ed SPR procedure, a new scheme for submodeling !nite element analysis is developed. Comparison of the numerical results obtained from this new scheme and traditional method shows encouraging improvements.
Superconvergence， a posteriori error estimation， Stress recovery， Submodeling analysis， Nonlinear analysis， Finite element method

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【期刊论文】A complex variable boundary collocation method for plane elastic problems
宗智， Z. Zong
，0001，（）：
1年11月30日
Lagrange interpolation is extended to the complex plane in this paper. It turns out to be composed of two parts: polynomial and rational interpolations of an analytical function. Based on Lagrange interpolation in the complex plane, a complex variable boundary collocation approach is constructed. The method is truly meshless and singularity free. It features high accuracy obtained by use of a small number of nodes as well as dimensionality advantage, that is, a twodimensional problem is educed to a onedimensional one. The method is applied to twodimensional problems in the theory of plane elasticity. Numerical examples are in very good agreement with analytical ones. The method is easy to be implemented and capable to be able to give the stress states at any point within the solution domain.
Plane elasticity,， Lagrange interpolation,， Complex variable,， Boundary collocation,， Meshless,， Singularityfree

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【期刊论文】A localized differential quadrature (LDQ) method and its application to the 2D wave equation
宗智， Z. Zong， K. Y. Lam
，0001，（）：
1年11月30日
Differential Quadrature (DQ) is a numerical technique of high accuracy, but it is sensitive to grid distribution and requires that the number of grid points cannot be too large. These two requirements greatly restrict wider applications of DQ method. Through a simplified stability analysis in this paper, it is concluded that these two limitations are due to stability requirements. This analysis leads us to propose to localize differential quadrature to a small neighbourhood so as to keep the balance of accuracy and stability. The derivatives at a grid point are approximated by a weighted sum of the points in its neighbourhood rather than of all grid points. The method is applied to the oneand twodimensional wave equations. Numerical examples show the present method produces very accurate results while maintaining good stability. The proposed method enables us to solve more complicated problems and enhance DQ's flexibility significantly.
Localization,， Differential quadrature,， Stability,， The wave equation

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【期刊论文】Dynamic Plastic Response of a Submarine Oil Pipeline to an Underwater Explosion Bubble
宗智， Z. Zong， K. Y. Lam
Journal of Applied Mechanics DECEMBER 2000, Vol. 67，0001，（）：
1年11月30日
Dynamic plastic response of a submarine oil pipeline to an underwater explosion bubble is studied in this paper. A detailed fluidstructure analysis is given to find the fluid forces acting on the pipeline. Assuming the pipeline is made from rigid, perfectly plastic material, we obtain the hydroplastic equation governing the dynamic plastic deflection of such a pipeline. The equation is analytically solved. Three examples are given to discuss the features of the dynamic plastic response and the applicability range of the present analysis. The relation between the half pipe length and maximum permanent plastic deflection is also given.

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【期刊论文】Dynamic plastic response of a submerged freefree beam to an underwater gas bubble
宗智， Z. Zong， Singapore
Acta Mechanica 161, 179194 (2003)，0001，（）：
1年11月30日
The dynamic plastic response of a submerged freefree beam to an underwater explosion bubble is studied in this paper. A fluidstructure analysis is given to find the fluid force acting on the beam. Assuming that the beam is made from rigid, perfectly plastic material, we obtain the hydroplastic equation governing the dynamic plastic deflection of such a beam. The equation is analytically solved. Examples are given to discuss the features of the dynamic plastic response. It is observed that longer beams sustain larger plastic deformations than shorter beams, but shorter beams undergo larger rigid body motion than longer beams. Most of energy is consumed on plastic deformation rather than on rigid body motion. It is impossible, however, for more than three hinges to form on the beam.

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