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1·The radiation damping matrix of the infinite element is derived.

推导了辐射无限元的辐射阻尼矩阵。

2·The estimations of maximum norm of damping matrix are also considered.

研究了阻尼矩阵的最大模估计。

3·The proof of its unconditionally stable requires no damping matrix to satisfying the condition of the orthogonality of modes.

法的无条件稳定性的证明，可不要求阻尼矩阵满足振型正交条件。

4·It is detailed derived from theory analysis to differential equation, and its damping matrix, rigidity matrix and quality matrix are given.

从理论分析到微分方程的建立做了详细的推导，并写出了刚度矩阵、阻尼矩阵和质量矩阵。

5·The equation has asymmetric mass matrix, asymmetric stiffness matrix and nonclassical damping matrix, and the direct solving format is given in this paper.

针对所得方程为非对称质量、非对称刚度、非经典阻尼的情况，本文给出了使用直接法求解的格式。

6·The complex modal analysis method is generalized to the cases in which stiffness matrix may be singular and mass matrix, damping matrix and stiffness may be nonsymmetric.

把复模态分析法推广到刚度矩阵可以奇导且质量矩阵、阻尼矩阵和刚度矩阵均不必为对称的情形。

7·Dynamics theory and the mass-spring-dashpot system model were used to develop an equilibrium equation. The mass matrix, elasticity matrix and damping matrix were given.

从机械系统动力学理论出发，参照振动系统的“质量弹簧阻尼”模型，分析推导了系统动力学平衡方程，得到了质量矩阵、弹性矩阵及阻尼矩阵的具体表达式。

8·Based on the story model of spatial member, the supplemental damping matrix, dynamic balance equation and relative energy balance equation of structures with viscous dampers are derived.

基于结构空间杆系-层模型，推导了粘滞阻尼器减震结构的附加阻尼矩阵、动力平衡方程和相对能量方程。

9·When a structure vibrates in water, large amount of computation will be unavoidable if the fluid finite element method is used to calculate the added water mass matrix and damping matrix.

当结构在静水中振动时，如采用流体有限元来计算流体的附加质量和附加阻尼，势必导致解题规模过大。

10·Since the damping matrix in the motion equation of damped blade is no longer decoupled as Rayleigh damping, so the complex mode theory is introduced in this paper to overcome the difficulty.

由于带阻尼围带或凸肩叶片(以下简称阻尼叶片)的运动方程中的阻尼矩阵是非解耦的矩阵，只有引入复模态理论才能圆满解决其特征问题的求解。