Focusing on the defects of the classical modal parameter estimation approach, this paper investigates a novel technique for modal parameter identification of structures under operation conditions.
针对传统模态辨识方法存在的缺陷，研究了工程结构在环境激励下的模态参数的辨识问题。
The method of structural damage assessment based on changes in eigenvalues has some defects. Therefore, this paper presents a method of damage assessment of frame structures based on changes in mode.
针对常规的基于特征值变化进行结构破损评估方法的不足，提出了基于振型变化进行框架结构破损评估的方法。
It has been used in the optimization design of reticulated structures, but its defects make the evolution progress too long and too slowly.
为了加快遗传算法的进化过程，提出了基于遗传算法和满应力准则进行网格结构优化的杂交算法。
The cracks are one of defects often occurred on the concrete structures.
裂纹、裂缝是混凝土结构常见的缺陷之一。
The design of tower structures foundation is more complicated than common structures, and it is difficult to study tower structure mechanical durability and diagnose its defects.
相对一般结构而言，高耸工程结构的基础设计更为复杂，其力学耐久性研究和病害诊断也更显困难。
Besides, he also established the nonlinear bending equations considering the influence of initial geometric defects in the double-deck reticulated shallow shell structures.
另外，还建立了考虑双层网格扁壳结构几何初始缺陷影响的非线性弯曲方程。
As people were gradually aware of the defects of concrete structures and steel high-rise building, more and more hybrid structures were used.
随着人们逐渐对混凝土结构和钢结构高层建筑各自所存在缺陷的认识，越来越多地采用了混合结构。
Ion beam irradiation is usually thought to induce defects and disordered structures in materials and then to destroy the properties of the materials.
离子束辐照通常被认为导致材料产生缺陷，形成无序结构，从而破坏材料的性能。
Conclusions Transplantation of the corresponding structures from the foot results in satisfactory repair of the hand defects, especially composite tissue defect.
结论选择足部相应部位组织瓣修复手部组织缺损，特别是复合性组织缺损，效果满意。
Conclusions Transplantation of the corresponding structures from the foot results in satisfactory repair of the hand defects, especially composite tissue defect.
结论选择足部相应部位组织瓣修复手部组织缺损，特别是复合性组织缺损，效果满意。
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