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In the course of ship structural strength experiment, it is difficult to obtain the full field deformation data of a structure by the traditional discrete point deformation measuring technique. Therefore, the progressive destruction process of a structure cannot be effectively revealed on the base of the method. In this paper, the deformation field measuring technique of a ship grillage structure was established based on the principle of digital image correlation and 3D laser scanning. The displacement shape function and correlation criterion of subset were proposed for deformation measurement of the ship grillage structure. Moreover, a digital speckle making tool was developed in order to obtain a quantitative and controllable digital speckle field. Based on a portable 3D laser scanning system, a method for measuring the geometry of ship grillage structure was presented. An experiment was carried out to verify the deformation field measuring technique of ship grillage structure. The structural deformation field of the model under longitudinal compression load was obtained by the experiment, and the failure evolution behavior was found before and after the critical state of the model structure. Through the above experiment, the space-time evolution law of deformation field for the ship grillage structure was revealed. A basic measuring technique for failure mode recognition of real ship structures was provided in this paper.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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