Stress analysis and evaluation of spherical tanks
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1. Many people perform analytical calculations for spherical tanks without including tie rods; they say this is a conservative approach. Well, I guess I just want to ask what exactly constitutes this conservative method? Could you tell me, but he can’t say it. 2. Some people actually made the pull rod into a spring – who taught them to do that? I said it was wrong, and he was very unhappy. Why is it wrong? Because the principle isn’t understood. 3. There are numerous companies in China that specialize in manufacturing spherical tanks; it can be said that this technology is now widespread, and sophisticated calculations are no longer necessary. Yet, most people around us still do not know how to design spherical tanks, with some only handling conventional designs. I started working on spherical tanks in 2012, while the experts at Hefei General Machinery Research Institute had already been doing this for a long time – they truly are pioneers in this field. When we first started working on spherical tanks, we also referred to their methods and studied many of their research papers; they didn’t make the tie rods into springs. 4. Some grid divisions are particularly fine; in fact, some high-stress areas do require finer segmentation, while there are areas where such fine division is not necessary. 5. It was found that the seismic loads were not clearly defined, and this is not the fault of our analysts; the main issue is that domestic standards are much more general compared to foreign standards, and they also overlook certain aspects and lack detail. If you study the ASCE 7-22 standard, you will understand how the actual loads should be applied. 6. Some do not conduct pressure tests for evaluation, and even when evaluation is carried out, the method used is incorrect. 7. We are still in the development stage, still on the path to progress. While it’s important to make the spherical tanks look attractive so that laypeople perceive them as impressive, the most crucial thing is to ensure the accuracy of the calculations. Safety comes first; after all, if a spherical tank fails, it can lead to serious consequences. If we can’t handle spherical tanks with capacities of 1500 cubic meters, 2000 cubic meters, or 3000 cubic meters, then we certainly won’t be able to manage ones with a capacity of 20,000 cubic meters.
1. He might be called “conservative” because the ball tank design without tie rods is safer, as tie rods can pose uncertain risks in some extreme situations. However, the specific conservation methods still need to be considered based on the particular design and usage environment. 2. Making the pull rod into a spring may be due to certain specific design considerations, but it is not applicable in all cases. To address this issue, understanding the principles of design is of primary importance. 3. The design and manufacturing of spherical tanks are relatively mature and widespread in China, but there are not many people who truly understand and can carry out such designs effectively. This may be related to factors such as knowledge accumulation and experience transmission within the industry. 4. The level of detail in grid division should be determined based on the requirements of stress analysis. Excessively fine grid division may increase computational complexity and time, which is unnecessary. 5. The calculation and application of seismic loads are not detailed in domestic standards and codes, which may affect the safety and stability of the design. 6. Hydrostatic testing is an important part of sphere tank design, but it is not carried out or is not done accurately in some design evaluations. 7. We should always prioritize safety as the top principle, and continuously improve our design capabilities and technical skills to ensure that the design of each spherical tank meets the required standards. Only in this way can we demonstrate better capabilities in larger projects. .