According to the computed result , the structure of NEEC is safe , but its safety margin is small, so the safety of the product should also be ensured through the design.
计算结果表明，该喷管出口锥与延伸锥结构是安全的，但考虑到材料性能的波动，安全余量较小，应从设计上保证产品的可靠性。
A vibration failure mode of structural system was presented according to engineering design criterion. The safety margin equation of the vibration failure mode was developed.
从工程上常用的振动设计准则出发，定义了振动问题的破坏模式，给出了以结构自振频率和外载频率为基本随机变量的安全边界方程。
As the awareness and demand of safety increasing, the concept of safety margin appears more and more in engineering design and People's Daily life.
随着人们对安全认识和需求的不断提高，安全裕度的概念越来越多受到工程设计界及人们日常生活的关注。
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