At present, in the design of reticulated shells, the initial deformation of the first buckling mode(the dimension is L/300) of the structure is introduced as initial imperfection.
目前在网壳结构设计中，初始缺陷是按照第一阶屈曲模态的L/300（L为结构跨度），对结构施加初始变形。
Meanwhile, by temporal analysis method, the author calculates the relationship between T-type and L-type torsion and local deformation of plane irregular house structure arrangement.
同时用时程分析方法，计算分析了T型、L型平面非规则布置房屋结构的扭转和局部变形的关系。
Preload condition, the cylinder head bolt-hole depth of deformation of the cylinder sets a great impact on the proper cylinder head bolt hole depth Shen cylinder l.
预紧工况下，缸盖螺栓沉孔深度对气缸套变形影响很大，适当的缸盖螺栓沉孔深度有利于减小气缸套变形。
Preload condition, the cylinder head bolt-hole depth of deformation of the cylinder sets a great impact on the proper cylinder head bolt hole depth Shen cylinder l.
预紧工况下，缸盖螺栓沉孔深度对气缸套变形影响很大，适当的缸盖螺栓沉孔深度有利于减小气缸套变形。
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