如何检验铸件的裂纹，缩孔，缩松？
What inspection functions are performed for the detection of casting cracks, porosity, and shrinks?
利用MATLAB生成几组随机数来模拟参考裂纹尺寸和应力水平不同时的裂纹形成时间(TTCI)值，并以此检验了理论推导的正确性和合理性。
Finally, several groups of random Numbers were produced with MATLAB to simulate TTCI values when cracks propagated, with which correctness and rationality of theoretical deduction were verified.
本文以桥梁仿真分析技术为主线，以整治效果为目标，以荷载试验和长期观测为检验手段，建立了既有钢桥裂纹安全检测评估系统。
Based upon finite element simulation analysis, load tests and long-term observation, a detection and evaluation system for old steel bridge safety was developed in this thesis.
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