Main reasons are abnormal complexity and strong coupling in the boiling sugar crystallization process.

作者认为其主要原因是煮糖结晶过程异常复杂，耦合性又比较强。

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Obvious vibration occurred in a new triose producing building in the process of boiling sugar. After reinforcement, the vibration of the building had been reduced, yet, the result was not satisfied.

某丙糖煮糖楼在建成投产后，在煮糖过程中发生明显的振动，经过结构加固，虽振感减轻，但仍然不能达到令人满意的效果。

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