AVIC Xi'an Aircraft Industry Group applies for patents related to water tank damage calculation, providing methods and processes for equivalent impact damage assessment of water tanks

April 2 News, the State Intellectual Property Office information shows that China Aviation Xi’an Aircraft Industry Group Co., Ltd. has applied for a patent titled “An Equivalent Calculation Method and Device for Water Tank Impact Damage.” The application publication number is CN121766004A, the application number is CN202511804930.7, the publication date is March 31, 2026, the application date is December 3, 2025, inventors are Li Jianping, Luo Pengfei, Chi Fujian, the patent agency is China Aviation Patent Center, patent agent Wei Yuanyuan, classification numbers G06F30/23, G06F30/28, G06T17/20, G06F119/14, G06F119/12, G06F119/02, G06F111/04.

The patent abstract indicates that this application provides an equivalent calculation method and device for water tank impact damage, including: Step 1, establishing a detailed finite element model of the water tank; Step 2, calculating the initial collision velocity V of the foreign object impacting the water tank cylinder based on the drop height H; Step 3, calculating the separation velocity VL of the foreign object after collision; Step 4, using finite element method in the detailed finite element model of the water tank to compute the relationship between collision load and normal displacement at the collision point, applying a unit normal load P to obtain the normal displacement W; Step 5, calculating the unknown coefficient x based on the unit load P and displacement W; Step 6, using the formula with x to determine the peak load F generated during impact; Step 7, calculating the impact damage of the cylinder using static solution methods based on the peak load.

China Aviation Xi’an Aircraft Industry Group was established on June 18, 1997, listed on the Shenzhen Stock Exchange on June 26, 1997, with its registered and office location in Xi’an, Shaanxi Province. It is an important enterprise in China’s aerospace industry, focusing on military and civil aviation products, with full industry chain advantages, highlighting investment value.

Its main business covers research, production, sales, maintenance, and services of military and civil aviation components such as large and medium-sized aircraft complete machines, landing gear, and wheel brake systems. It also involves the production and sales of products related to transportation equipment industry, building materials industry, and other fields. The company’s industry classification is National Defense Military Industry - Aerospace Equipment II - Aerospace Equipment III, with concept sectors including AVIC Group, AVIC system, and Airbus concepts.

In 2025, China Aviation Xi’an’s operating revenue was 41.01B yuan, ranking third among 21 industry companies, below AVIC Power (46.33B yuan) and AVIC Shenyang Aircraft (44.66B yuan), far above the industry average of 11.47B yuan and median of 3.7B yuan. In main business, aerospace product revenue was 40.55B yuan, accounting for 98.86%, with other businesses generating 466M yuan, accounting for 1.14%. Net profit in 2025 was 1.15B yuan, ranking third in the industry, below AVIC Shenyang Aircraft’s 3.54B yuan and AVIC Avionics’ 1.34B yuan, but above the industry average of 532 million yuan and median of 252 million yuan.

Recent patent information for China Aviation Xi’an Aircraft Industry Group Co., Ltd. is as follows:

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